CN111796715B - Detection method and detection device for touch control light film - Google Patents
Detection method and detection device for touch control light film Download PDFInfo
- Publication number
- CN111796715B CN111796715B CN202010595212.4A CN202010595212A CN111796715B CN 111796715 B CN111796715 B CN 111796715B CN 202010595212 A CN202010595212 A CN 202010595212A CN 111796715 B CN111796715 B CN 111796715B
- Authority
- CN
- China
- Prior art keywords
- projection
- touch
- image
- light film
- light
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 29
- 239000010408 film Substances 0.000 claims abstract description 191
- 239000012788 optical film Substances 0.000 claims abstract description 24
- 238000000034 method Methods 0.000 claims description 23
- 238000002310 reflectometry Methods 0.000 claims description 19
- 238000012545 processing Methods 0.000 claims description 15
- 230000000875 corresponding effect Effects 0.000 description 9
- 230000008859 change Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000001502 supplementing effect Effects 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000001360 synchronised effect Effects 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
- G06F3/0418—Control or interface arrangements specially adapted for digitisers for error correction or compensation, e.g. based on parallax, calibration or alignment
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Position Input By Displaying (AREA)
Abstract
The invention discloses a detection method and a detection device for a touch control optical film, wherein the detection method comprises the following steps: acquiring a reference image of a projection plane of a projection light curtain, and acquiring a reference coordinate of a reference line according to the reference image; wherein the projection surface is provided with a reference line; acquiring a projection image of a touch light film on a projection surface of the projection light curtain, and acquiring projection coordinates of the touch light film according to the projection image; and combining the actual size of the reference line and the reference coordinate with the projection coordinate to determine the projection parameter of the touch control light film. The technical scheme of the invention can effectively detect the projection parameters of the touch control optical film.
Description
Technical Field
The invention relates to the technical field of light detection, in particular to a detection method and a detection device for a touch light film.
Background
The projection light film is used as a new touch input mode, and the application field is gradually expanded due to flexible setting. The projected touch light film has a certain effective touch area range, and parameters of the touch light film in the effective touch area need to be detected, so that the projected touch light film is ensured to be qualified. However, there is no effective solution for detecting a touch light film.
The foregoing is provided merely for the purpose of facilitating understanding of the technical solutions of the present application and is not intended to represent an admission that the foregoing is prior art.
Disclosure of Invention
Based on the above, a method and a device for detecting the touch optical film are provided for solving the problem that the scheme for effectively detecting the parameters of the touch optical film is lacking at present, and the method and the device aim to effectively detect the parameters of the touch optical film.
In order to achieve the above objective, the present invention provides a method for detecting a touch light film, which obtains a reference image of a projection plane of a projection light curtain, and obtains a reference coordinate of a reference line according to the reference image; wherein the projection surface is provided with a reference line;
Acquiring a projection image of a touch light film on a projection surface of the projection light curtain, and acquiring projection coordinates of the touch light film according to the projection image;
and combining the actual size of the reference line and the reference coordinate with the projection coordinate to determine the projection parameter of the touch control light film.
Optionally, before the step of acquiring the reference image of the projection surface of the projection light curtain, the method includes:
acquiring an effective touch range of a touch light film, and determining a touch near end and a touch far end of the projection light curtain from a light film generator according to the effective touch range; the optical film generator is used for emitting a touch optical film;
the step of obtaining the reference image of the projection light curtain projection surface and obtaining the reference coordinate of the reference line according to the reference image comprises the following steps:
moving the projection light curtain to the touch near end, acquiring a first reference image of a projection surface of the projection light curtain, and acquiring a first reference coordinate of a reference line according to the first reference image; wherein the reference image comprises a first reference image, the reference coordinates comprising first reference coordinates;
The step of obtaining the projection image of the touch light film on the projection surface of the projection light curtain and obtaining the projection coordinate of the touch light film according to the projection image comprises the following steps:
acquiring a first projection image of a touch light film on a projection surface of the projection light curtain, and acquiring a first projection coordinate according to the first projection image; wherein the projection image comprises a first projection image and the projection coordinates comprise first projection coordinates.
Optionally, the reflectivity of the reference line and the projection surface are different;
the step of acquiring the first reference coordinate of the reference line according to the first reference image includes:
Acquiring the reference brightness of the first reference image, and performing binarization processing on the reference brightness of the first reference image;
And determining a first reference coordinate of the reference line according to the binarized bright-dark position.
Optionally, the step of acquiring the first projection coordinates according to the first projection image includes:
Acquiring the projection brightness of the first projection image, and performing binarization processing on the projection brightness of the first projection image;
And determining a first projection coordinate of the first projection image according to the light and dark positions after binarization processing.
Optionally, the reference line includes a longitudinal edge perpendicular to the touch light film and a transverse edge parallel to the touch light film, the longitudinal edge length is a, the transverse edge length is B, the longitudinal coordinate of the first reference coordinate includes L 0 and L 1 at two longitudinal ends, the longitudinal coordinate of the first projection coordinate includes L 0 'and L 1' at two longitudinal ends, a touch reference plane is disposed below the touch light film, and the projection parameter includes a first distance C 0 between a center point of the first projection image in the longitudinal direction and the touch reference plane
C0＝[((L1`+L0`)/2)－((L1+L0)/2)]×[A/(L1－L0)]。
Optionally, the step of acquiring a reference image of the projection surface of the projection light curtain, and acquiring the reference coordinates of the reference line according to the reference image includes:
Moving the projection light curtain to the touch remote end, acquiring a second reference image of a projection surface of the projection light curtain, and acquiring a second reference coordinate of a reference line according to the second reference image; wherein the reference image further comprises a second reference image, the reference coordinates further comprising second reference coordinates;
The step of obtaining the projection image of the touch light film on the projection surface of the projection light curtain and obtaining the projection coordinate of the touch light film according to the projection image comprises the following steps:
Acquiring a second projection image of the projection light curtain projection surface, and acquiring second projection coordinates of the touch light film according to the second projection image; wherein the projection image further comprises a second projection image, and the projection coordinates further comprise second projection coordinates.
Optionally, the projection parameters further include a second distance C 1 between a center point of the second projection image in the longitudinal direction and the touch reference plane, and C 1 is determined according to the second reference coordinate and the second projection coordinate;
The projection parameters further include the tilt angle delta of the touch light film
Wherein, F 0 is the distance between the touch near end and the light film generator, F 1 is the distance between the touch far end and the light film generator.
Optionally, the reference line includes a longitudinal edge perpendicular to the touch light film and a transverse edge parallel to the touch light film, the longitudinal edge has a length a, the transverse edge has a length B, the longitudinal coordinate of the first reference coordinate includes L 0 and L 1 at two longitudinal ends, the longitudinal coordinate of the first projection coordinate includes L 0 'and L 1' at two longitudinal ends, the projection parameter includes a touch light film thickness H, then
H＝[(L1`－L0`)/(L1－L0)]×A。
Optionally, the projection parameter further includes a brightness uniformity value of the touch light film, and the detection method further includes:
acquiring brightness information of all pixel points of the first projection image, and calculating a brightness average value according to the brightness information;
calculating the brightness uniformity value of the touch control light film according to the brightness average value;
Wherein the brightness information is Di, and the brightness average value N is the number of pixels, then
The brightness uniformity value sigma of the touch light film
In addition, in order to achieve the above object, the present invention further provides a detection device for a touch light film, the detection device including:
The acquisition module is used for acquiring a reference image of a projection plane of the projection light curtain and acquiring a reference coordinate of a reference line according to the reference image; wherein the projection surface is provided with a reference line;
the acquisition module is also used for acquiring a projection image of the touch control light film on the projection surface of the projection light curtain and acquiring the projection coordinate of the touch control light film according to the projection image;
And the control module is used for combining the actual size of the reference line and the reference coordinate with the projection coordinate to determine the projection parameter of the touch control light film.
In the technical scheme provided by the invention, a reference line is arranged on a projection surface of a projection light curtain, a reference image with the reference line is obtained, and the reference coordinate of the reference line is determined according to the reference image, and it can be understood that the actual size of the reference line and the reference coordinate have a corresponding relation. And acquiring a projection image of the touch control light film on a projection plane of the projection light curtain, acquiring projection coordinates of the touch control light film according to the projection image, and determining projection parameters of the touch control light film by combining the actual size of the reference line with the reference coordinates and the projection coordinates by utilizing the corresponding relation between the actual size of the reference line and the reference coordinates. According to the technical scheme, the projection parameters of the touch control light film are effectively calculated according to the reference line arranged on the projection surface of the projection light curtain.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flowchart of a touch light film detection method according to a first embodiment of the present invention;
FIG. 2 is a flowchart of a touch light film detection method according to a second embodiment of the present invention;
FIG. 3 is a flowchart of a third embodiment of a touch light film detection method according to the present invention;
FIG. 4 is a flowchart of a fourth embodiment of a touch light film detection method according to the present invention;
FIG. 5 is a flowchart of a touch light film detection method according to a sixth embodiment of the present invention;
FIG. 6 is a flowchart of a touch light film detection method according to a ninth embodiment of the present invention;
FIG. 7 is a schematic diagram of a touch light film detection device according to the present invention;
fig. 8 is a schematic diagram of a projection plane of a projection light curtain in the touch light film detection device of the present invention.
Reference numerals illustrate:
| Reference numerals | Name of the name | Reference numerals | Name of the name |
| 01 | Acquisition module | 20 | Light film generator |
| 02 | Control module | 210 | Touch control light film |
| 10 | Projection light curtain | 30 | Fixed platform |
| 110 | Touch proximal end | 310 | Touch reference plane |
| 120 | Touch remote end | 40 | Support frame |
| 130 | Reference line | 50 | Infrared light supplementing lamp |
| 131 | Longitudinal edge | 60 | Infrared camera |
| 132 | Transverse edge | 70 | Control terminal |
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In addition, the technical solutions of the embodiments of the present invention may be combined with each other, but it is necessary to be based on the fact that those skilled in the art can implement the technical solutions, and when the technical solutions are contradictory or cannot be implemented, the combination of the technical solutions should be considered as not existing, and not falling within the scope of protection claimed by the present invention.
Referring to fig. 1, in a first embodiment of the present invention, a touch principle of a touch light film is to project a layer of light film on a touch plane, and then shoot a finger through a camera to block the position of the light film, so as to determine an input command. The touch light film is emitted by a light film generator, which typically includes a grating assembly, that is, the touch light film may be striped with alternating light and dark. After being emitted by the optical film generator, the touch optical film generally diverges along with the change of the distance, the thickness also changes, and the writing changes directly influence the touch feedback effect. Therefore, it is necessary to detect the projection parameters of the touch light film, and further determine whether the touch light film can meet the touch requirements. In addition, in order to avoid the influence of the touch control light film on a user, the light wavelength of the touch control light film is set in an infrared wavelength band, so that human eyes cannot recognize the touch control light film, and the use experience of the user is further prevented from being influenced. The detection method comprises the following steps:
Step S10, obtaining a reference image of a projection plane of a projection light curtain, and obtaining a reference coordinate of a reference line according to the reference image; wherein the projection surface is provided with a reference line.
Specifically, the camera is fixedly arranged on one side of the projection surface of the projection light curtain, the shooting surface of the camera faces the projection surface of the projection light curtain, and a reference image is obtained through shooting by the camera, wherein a reference line is arranged on the projection surface of the projection light curtain, and the reference image also has an image of the reference line. Reference coordinates of the reference line are determined from the reference image, the reference coordinates including pixel coordinates. The reference line is arranged on the projection surface of the projection light curtain, the actual size of the reference line can be measured, and the actual size value of the reference line is stored. The camera may include an infrared camera that is capable of effectively capturing infrared light reflected by an object to form an image.
Step S20, a projection image of the touch light film on a projection surface of the projection light curtain is obtained, and projection coordinates of the touch light film are obtained according to the projection image.
Specifically, the light film generator is also arranged on one side of the projection surface of the projection light curtain, the light film generator is started, the touch light film is projected on the projection surface of the projection light curtain, and a projection image of the touch light film is obtained through shooting by the camera. And determining the projection coordinates of the touch light film according to the position of the image of the touch light film in the projection image, wherein the projection coordinates comprise pixel coordinates. The pixel coordinates refer to the position of the image on the pixel point array, the number of rows and the number of columns. The pixel coordinates are typically marked (0, 0) with the pixel point at the sitting angle as the starting point.
And step S30, combining the actual size of the reference line and the reference coordinate with the projection coordinate to determine the projection parameters of the touch light film.
Specifically, the actual size of the reference line can be derived by pre-measurement. The actual size of the reference line directly affects the reference coordinates of the reference line, for example, if the reference line becomes longer, the reference coordinate values of the reference line also change, i.e., the lateral range values of the reference coordinates become larger. If the reference line becomes thicker, the longitudinal extent of the reference line also becomes larger. It follows that there is a corresponding synchronous relationship between the actual size of the reference line and the reference coordinates. According to the synchronous change relation, the projection parameters of the touch control optical film can be calculated by combining the actual size of the reference line, the reference coordinate and the projection coordinate. The projection parameters may include a distance of a center point of the longitudinal direction of the touch light film from the touch reference surface, an inclination angle of the touch light film, a thickness of the touch light film, and a brightness uniformity value of the touch light film.
In the technical scheme provided by the embodiment, a reference line is set on a projection plane of a projection light curtain, a reference image with the reference line is obtained, and a reference coordinate of the reference line is determined according to the reference image, and it can be understood that the actual size of the reference line has a corresponding relation with the reference coordinate. And acquiring a projection image of the touch control light film on a projection plane of the projection light curtain, acquiring projection coordinates of the touch control light film according to the projection image, and determining projection parameters of the touch control light film by combining the actual size of the reference line with the reference coordinates and the projection coordinates by utilizing the corresponding relation between the actual size of the reference line and the reference coordinates. According to the technical scheme of the embodiment, the projection parameters of the touch control light film are effectively calculated according to the reference line arranged on the projection surface of the projection light curtain.
Referring to fig. 2, on the basis of the first embodiment of the present invention, a second embodiment of the present invention is provided, comprising, before the step of acquiring a reference image of a projection surface of a projection light curtain:
Step S40, acquiring an effective touch range of the touch light film, and determining a touch near end and a touch far end of the projection light curtain from the light film generator according to the effective touch range; the optical film generator is used for emitting a touch optical film; specifically, the touch light film emitted by the light film generator has an effective touch range, for example, the touch light film is gradually diverged after being emitted by the light film generator, so that the thickness of the touch light film is gradually thickened, the thickness of the touch light film is excessively thick, the touch light film may cross with the touch reference plane, and the touch light film is blocked, so that the judgment of the touch position is affected. In addition, the thickness of the touch light film is too thin, and when the finger shields the corresponding position, the quantity of reflected light is small, so that the judgment of the touch position is also affected. Therefore, the touch light film is provided with an effective touch range. And determining the distance between the light film generator and the effective touch range of the touch light film through the effective touch range, namely obtaining the distance between the light film generator and the touch near end and the distance between the light film generator and the touch far end. The projection optical films are respectively arranged at the touch near end and the touch far end, so that projection parameters of the touch optical films under two conditions are obtained.
The step of obtaining a reference image of a projection plane of the projection light curtain and obtaining a reference coordinate of a reference line according to the reference image comprises the following steps:
Step S110, moving a projection light curtain to a touch near end, acquiring a first reference image of a projection surface of the projection light curtain, and acquiring a first reference coordinate of a reference line according to the first reference image; wherein the reference image comprises a first reference image and the reference coordinates comprise first reference coordinates.
Specifically, the optical film generator is arranged on the surface of the fixed platform, and the surface of the fixed platform is a touch reference surface. The touch light film emitted by the light film generator propagates along the touch reference plane to the projection light curtain, and in order to ensure that the projection image obtained by shooting and the reference image can be effectively correlated and compared, the projection plane of the projection light curtain and the touch reference plane of the fixed platform are vertically arranged. The projection light curtain is arranged on the support in a moving mode, the support is fixedly connected with the fixing platform, the synchronous change positions of the light film generator arranged on the fixing platform and the projection light curtain arranged on the support are further guaranteed, and the touch control reference plane of the projection light curtain and the perpendicular of the projection light curtain are always kept. In addition, be provided with the slide rail on the support, projection light curtain can follow the slide rail and remove, is close to or keeps away from the light membrane generator. After the projection light curtain moves to the touch near end along the support, a projection surface of the projection light curtain is shot by the camera, a first reference image is obtained, the image including a reference line in the first reference image can be known, and a first reference coordinate is obtained according to the position of the reference line in the first reference image.
The method for acquiring the projection image of the touch light film on the projection surface of the projection light curtain comprises the following steps of:
Step S210, a first projection image of the touch light film on a projection surface of a projection light curtain is obtained, and a first projection coordinate is obtained according to the first projection image; the projection image comprises a first projection image, and the projection coordinates comprise first projection coordinates.
Specifically, the light film generator is started, the touch light film is projected on the projection surface of the projection light curtain, the projection light curtain is arranged at the touch near end position, and a projection image of the touch light film, namely a first projection image, is obtained through shooting by the camera. And determining a first projection coordinate of the touch light film according to the position of the image of the touch light film in the first projection image. From this, the first reference coordinates and the first projection coordinates are obtained through step S110 and step S210. The actual size of the reference line is pre-stored, the actual size is extracted, and the projection parameters of the touch control optical film are determined through the combination of the actual size of the reference line and the first reference coordinate and the first projection coordinate.
Referring to fig. 3, a third embodiment of the present invention is proposed on the basis of the second embodiment of the present invention, in which a reference line is provided on a projection surface of a projection light curtain, and the reflectivity of the reference line and the projection surface are different; the reflectivity of the reference line may be lower than the reflectivity of the projection surface, or the reflectivity of the reference line may be higher than the reflectivity of the projection surface. By the difference of the reflectivities, the light brightness positions obtained by shooting by the cameras are different, and the positions of the reference lines are determined. In addition, before shooting the reference image, light is emitted to the projection light curtain through the light supplementing lamp, the light supplementing lamp can be an infrared light supplementing lamp, the camera is an infrared camera, and the infrared light cannot be observed by human eyes, so that adverse effects of the light on the human eyes can be avoided.
The step of obtaining a first reference coordinate of a reference line from a first reference image comprises:
Step S111, obtaining the reference brightness of the first reference image, and performing binarization processing on the reference brightness of the first reference image. Specifically, the luminance from dark to bright may be represented by a numerical value, for example, 0 represents dark, 255 represents bright, and 0 to 255 gradually increase in luminance. The more light the camera acquires, the higher the brightness at the corresponding location. The compensation lamp emits compensation light to the projection screen, and the position of the reference line can be judged by the amount of light acquired because the reflectivity of the reference line and the reflectivity of the projection surface are different. Further, in order to make the boundary between the reference line and the projection plane clearer, a first threshold is set, and binarization processing is performed on the reference brightness of the first reference image according to the first threshold. The luminance points below the first threshold are all set to 0, and the luminance points above the first threshold are all set to 255, whereby the bright-dark position of the first reference image is clear, with no intermediate over-luminance pixel points.
Step S112, determining a first reference coordinate of the reference line according to the binarized bright-dark position.
Since the shading value of the first reference image has only a value of 0 representing dark and a value of 255 representing bright, there is no value between 0 and 255, so that the shading position of the first reference image is clear. With such a clear light-dark boundary, it is easier to determine the position of the reference line and thus the first reference coordinate.
Referring to fig. 4, on the basis of the third embodiment of the present invention, a fourth embodiment of the present invention is provided, wherein the step of acquiring the first projection coordinates according to the first projection image includes:
Step S211, obtaining the projection brightness of the first projection image, and performing binarization processing on the projection brightness of the first projection image; before step S211, the compensation lamp is turned off. Meanwhile, the touch control optical film is also infrared light, so that the influence of external light on the detection of the touch control optical film is avoided. For example, when the light film generator is opened in an opaque closed space, the touch light film extends along the touch reference plane of the surface of the fixed platform and images on the projection plane of the projection light curtain, it is understood that the touch light film is also perpendicular to the surface of the projection light curtain, and a strip-shaped light bar is formed on the projection plane of the projection light curtain, and the light bar has a length and a thickness. And controlling the camera to shoot a projection picture, obtaining a first projection image of the light bar, and obtaining the projection brightness of the first projection image. The same binarization processing is performed on the projection brightness of the first projection image. Specifically, a second threshold is set, and the projection brightness of the first projection image is binarized according to the second threshold. The luminance points below the second threshold are all set to 0, and the luminance points above the second threshold are all set to 255, whereby the bright-dark position of the first projected image is clear, with no intermediate over-luminance pixel points.
Step S212, determining the first projection coordinates of the first projection image according to the binarized bright-dark position.
Since the first projection image has a bright-dark value of 0 and a bright value of 255, and has no value between 0 and 255, the first projection image has a clear bright-dark position. Through the clear light and shade boundary, the imaging position of the projection light film is easier to determine, and then the first projection coordinate is determined.
On the basis of the fourth embodiment of the present invention, a fifth embodiment of the present invention is presented, wherein the reference line includes a longitudinal edge perpendicular to the touch light film and a transverse edge parallel to the touch light film, the longitudinal edge has a length a, the transverse edge has a length B, the longitudinal coordinates of the first reference coordinate include L 0 and L 1 at two longitudinal ends, the longitudinal coordinates of the first projection coordinate include L 0 'and L 1' at two longitudinal ends, a touch reference plane is disposed under the touch light film, and the projection parameter includes a first distance C 0 from the center point of the longitudinal direction of the first projection image to the touch reference plane
C0＝[((L1`+L0`)/2)－((L1+L0)/2)]×[A/(L1－L0)]。
The first distance C 0 can be effectively calculated by the above formula. It will be appreciated that the longitudinal edge length a and the first reference coordinate vary synchronously. For example, referring to fig. 8, the longitudinal coordinates include L 0 and L 1, the reference line has a left end point of L 0 and a right end point of L 1, and the two are different by a difference value. The ratio of the longitudinal coordinate difference to the longitudinal edge length a is fixed, i.e. a/(L 1－L0) is a fixed value. And generally, the longitudinal midpoint of the reference line and the touch reference plane are in the same plane, that is, the first distance C 0 between the center point of the first projection image in the longitudinal direction and the touch reference plane is equal to the distance between the center point of the first projection image in the longitudinal direction and the center point of the reference line.
Referring to fig. 5, a sixth embodiment of the present invention is provided based on the fifth embodiment of the present invention, wherein the step of acquiring a reference image of a projection surface of a projection light curtain and acquiring a reference coordinate of a reference line according to the reference image includes:
Step S120, moving the projection light curtain to a touch remote end, obtaining a second reference image of a projection surface of the projection light curtain, and obtaining a second reference coordinate of a reference line according to the second reference image; wherein the reference image further comprises a second reference image, and the reference coordinates further comprise second reference coordinates; the projection light curtain moves along the sliding rail of the bracket and is far away from the light film generator. After the projection light curtain moves to the touch remote end along the support, a projection surface of the projection light curtain is shot by the camera, a second reference image is obtained, the image including a reference line in the second reference image can be known, and a second reference coordinate is obtained according to the position of the reference line in the second reference image.
The method for acquiring the projection image of the touch light film on the projection surface of the projection light curtain comprises the following steps of:
Step S220, a second projection image of a projection light curtain projection surface is obtained, and second projection coordinates of the touch light film are obtained according to the second projection image; the projection image further comprises a second projection image, and the projection coordinates further comprise second projection coordinates. Specifically, the light film generator is started, the touch light film is projected on the projection surface of the projection light curtain, the projection light curtain is arranged at the touch distal end position, and a projection image of the touch light film, namely a second projection image, is obtained through shooting by the camera. And determining a second projection coordinate of the touch light film according to the position of the image of the touch light film in the second projection image. From this, the second reference coordinates and the second projection coordinates are obtained through step S120 and step S220. The actual size of the reference line is pre-stored, the actual size is extracted, and the projection parameters of the touch control optical film are determined through the combination of the actual size of the reference line and the second reference coordinate and the second projection coordinate.
In the above embodiment, the projected light curtain is moved to the touch distal end, and the obtained second reference image and second projected image are also subjected to the binarization processing of the brightness. Specifically, the compensation lamp emits compensation light to the projection screen, and the position of the reference line can be determined by the amount of light acquired because the reflectivity of the reference line and the reflectivity of the projection surface are different. And acquiring the reference brightness of the second reference image, and performing binarization processing on the reference brightness of the second reference image. Further, in order to make the boundary between the reference line and the projection plane clearer, a third threshold is set, and binarization processing is performed on the reference brightness of the second reference image according to the third threshold. The luminance points below the third threshold are all set to 0, and the luminance points above the third threshold are all set to 255, whereby the bright-dark position of the second reference image is clear, with no intermediate over-luminance pixel points. Since the shading value of the second reference image has only a value of 0 representing dark and a value of 255 representing bright, there is no value between 0 and 255, so that the shading position of the second reference image is clear. With such a clear light-dark boundary, it is easier to determine the position of the reference line and thus the second reference coordinate. Since the projected light curtain moves to the far touch end, the first threshold value and the third threshold value are usually different, and of course, the first threshold value and the third threshold value can be the same.
Further, the compensation lamp is turned off. As the touch light curtain moves to the touch far end, the touch light film diverges to generate an inclined angle. Likewise, an elongated light bar is formed on the projection surface of the projection light curtain, the light bar having a length and a thickness. And controlling the camera to shoot a projection picture, obtaining a second projection image of the light bar, and obtaining the projection brightness of the second projection image. And carrying out binarization processing on the projection brightness of the second projection image. Setting a fourth threshold value, and performing binarization processing on the projection brightness of the second projection image according to the fourth threshold value. The luminance points below the second threshold are all set to 0, and the luminance points above the second threshold are all set to 255, whereby the bright-dark position of the second projection image is clear, with no intermediate over-luminance pixel points. Since the second projection image has a bright-dark value of 0 and a bright value of 255, and has no value between 0 and 255, the second projection image has a clear bright-dark position. Through the clear light and shade boundary, the imaging position of the projection light film is easier to determine, and then the second projection coordinate is determined.
Based on the sixth embodiment of the present invention, a seventh embodiment of the present invention is provided, where the projection parameters further include a second distance C 1 between the center point of the second projection image in the longitudinal direction and the touch reference plane, and C 1 is determined according to the second reference coordinate and the second projection coordinate; the process of calculating C 1 refers to the fifth embodiment of the present invention.
The projection parameters also include the tilt angle delta of the touch light film, then
Wherein, F 0 is the distance between the touch near end of the projection light curtain and the light film generator, and F 1 is the distance between the touch far end of the projection light curtain and the light film generator. The inclined angle refers to the divergence angle of the touch light film after being emitted by the light film generator. By the above embodiment, a standard inclination angle range meeting the requirements can be set, and whether the inclination angle delta obtained by comparison calculation is within the standard inclination angle range can be judged.
On the basis of the fourth embodiment of the present invention, an eighth embodiment of the present invention is presented, wherein the reference line includes a longitudinal edge perpendicular to the touch light film and a transverse edge parallel to the touch light film, the longitudinal edge has a length a, the transverse edge has a length B, the longitudinal coordinate of the first reference coordinate includes L 0 and L 1 at both longitudinal ends, the longitudinal coordinate of the first projection coordinate includes L 0 'and L 1' at both longitudinal ends, and the projection parameter includes the touch light film thickness H, then
H＝[(L1`－L0`)/(L1－L0)]×A。
Through the embodiment, the standard touch light film thickness range meeting the requirement can be set, and whether the touch light film thickness H obtained through comparison calculation is within the standard touch light film thickness range is judged.
Referring to fig. 6, a ninth embodiment of the present invention is provided based on the fourth embodiment of the present invention, where the projection parameters further include luminance uniformity values of the touch light film, and the detection method further includes:
step S50, obtaining brightness information of all pixel points of the first projection image, and calculating a brightness average value according to the brightness information;
Step S60, calculating the brightness uniformity value of the touch control optical film according to the brightness average value;
Wherein the brightness information is Di, and the brightness average value N is the number of pixels, then
The brightness uniformity value sigma of the touch light film
Likewise, the above embodiment can set the standard brightness average range meeting the requirement and judge the brightness average value obtained by comparison calculationWhether within the standard luminance average. The standard brightness uniformity value range meeting the requirement can also be set, and whether the brightness uniformity value sigma obtained by contrast calculation is in the standard brightness uniformity value range is judged.
Referring to fig. 7 and 8, the invention further provides a detection device for a touch light film, which comprises an acquisition module 01 and a control module 02. The acquisition module 01 is used for acquiring a reference image of a projection plane of the projection light curtain and acquiring a reference coordinate of a reference line according to the reference image; wherein the projection surface is provided with a reference line; the acquisition module 01 is also used for acquiring a projection image of the touch control light film on the projection surface of the projection light curtain and acquiring the projection coordinate of the touch control light film according to the projection image;
the control module 02 is configured to combine the actual size of the reference line and the reference coordinate with the projection coordinate to determine a projection parameter of the touch light film.
The acquisition module 01 includes: the projection light curtain 10, the light film generator 20, the fixed platform 30, the bracket 40, the infrared light supplement lamp 50 and the infrared camera 60. The control module 02 includes a control terminal 70, where the control terminal 70 is used to control the projection light curtain 10 to slide on the support 40, and the control terminal 70 is also used to control the light film generator 20 to emit the touch light film 210. The control terminal 70 is also used for controlling the infrared light supplement lamp 50 and the infrared camera 60 to be turned on, operated and turned off. The control terminal 70 may be a computer.
A reference line 130 is arranged on the projection surface of the projection light curtain 10, and the reflectivity of the reference line 130 is different from that of the projection surface; the reflectivity of the reference line 130 may be lower than the reflectivity of the projection surface, or the reflectivity of the reference line 130 may be higher than the reflectivity of the projection surface. By such a difference in reflectivity, the light and shade positions obtained by the camera photographing are different, and the position of the reference line 130 is determined. The reference line 130 further has a longitudinal edge 131 perpendicular to the touch reference plane 310 and a transverse edge 132 parallel to the touch reference plane 310. It will be appreciated that the reference lines 130 form a rectangular pattern.
The light film generator 20 is disposed facing the projection surface of the projection light curtain 10, and the light film generator 20 is configured to emit a touch light film 210; wherein, the touch light film 210 is an infrared light film; the touch light film 210 emitted from the light film generator 20 propagates toward the projection light curtain 10 along the touch reference plane 310, and forms a strip of light having a length and a thickness on the projection plane of the projection light curtain 10.
The fixed platform 30 has a touch reference surface 310, and the light film generator 20 is disposed on the touch reference surface 310; the touch light film 210 has a touch active area, and the touch active area is located above the touch reference plane 310.
The projected light curtain 10 may be closer to or farther from the light film generator 20 along the support 40, the support 40 being configured to enable the projected light curtain 10 to be perpendicular to the touch reference plane 310. The touch active area of the touch light film 210 includes a touch proximal end 110 that is closer to the light film generator 20 and a touch distal end 120 that is farther from the light film generator 20.
The infrared light filling 50 lamp is used for emitting infrared compensation light to the projection surface of the projection light curtain 1010; the infrared light compensating lamp 50 is used for providing brightness for shooting a reference image, and meanwhile, infrared light can avoid adverse effects of light on human eyes.
The infrared camera 60 is disposed facing the projection light curtain 10, and the infrared camera 60 is configured to acquire an image of a projection surface of the projection light curtain 10. The infrared camera 60 can receive infrared light, and the infrared camera 60 can accurately shoot and obtain reference images and projection images.
In this embodiment, a reference line 130 is disposed on the projection plane of the projection light curtain 10, the infrared light compensating lamp is turned on, a reference image with the reference line 130 is obtained by the infrared camera 60, the reference coordinates of the reference line 130 are determined according to the reference image, and a corresponding correspondence exists between the actual size of the reference line 130 and the reference coordinates. The infrared camera 60 obtains a projection image of the touch light film 210 on the projection surface of the projection light curtain 10, obtains projection coordinates of the touch light film 210 according to the projection image, and utilizes the corresponding relation between the actual size of the reference line 130 and the reference coordinates to combine the actual size of the reference line 130 and the reference coordinates with the projection coordinates to determine projection parameters of the touch light film 210. According to the technical scheme of the embodiment, the control terminal 70 effectively calculates the projection parameters of the touch control optical film 210 according to the reference line 130 arranged on the projection surface of the projection optical curtain 10.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The foregoing embodiment numbers of the present invention are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.
From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) as described above, comprising instructions for causing a terminal device (which may be a mobile phone, a computer, a server, or a network device, etc.) to perform the method according to the embodiments of the present invention.
The foregoing description of the preferred embodiments of the present invention should not be construed as limiting the scope of the invention, but rather should be understood to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the following description and drawings or any application directly or indirectly to other relevant art(s).
Claims (8)
1. The detection method of the touch control optical film is characterized by comprising the following steps of:
acquiring a reference image of a projection plane of a projection light curtain, and acquiring a reference coordinate of a reference line according to the reference image; wherein the projection surface is provided with a reference line;
Acquiring a projection image of a touch light film on a projection surface of the projection light curtain, and acquiring projection coordinates of the touch light film according to the projection image;
combining the actual size of the reference line and the reference coordinate with the projection coordinate to determine the projection parameter of the touch control light film;
before the step of obtaining the reference image of the projection surface of the projection light curtain, the method comprises the following steps:
acquiring an effective touch range of a touch light film, and determining a touch near end and a touch far end of the projection light curtain from a light film generator according to the effective touch range; the optical film generator is used for emitting a touch optical film;
the step of obtaining the reference image of the projection light curtain projection surface and obtaining the reference coordinate of the reference line according to the reference image comprises the following steps:
moving the projection light curtain to the touch near end, acquiring a first reference image of a projection surface of the projection light curtain, and acquiring a first reference coordinate of a reference line according to the first reference image; wherein the reference image comprises a first reference image, the reference coordinates comprising first reference coordinates;
The step of obtaining the projection image of the touch light film on the projection surface of the projection light curtain and obtaining the projection coordinate of the touch light film according to the projection image comprises the following steps:
Acquiring a first projection image of a touch light film on a projection surface of the projection light curtain, and acquiring a first projection coordinate according to the first projection image; wherein the projection image comprises a first projection image, and the projection coordinates comprise first projection coordinates;
The reference line comprises a longitudinal edge perpendicular to the touch light film and a transverse edge parallel to the touch light film, the length of the longitudinal edge is A, the length of the transverse edge is B, and a touch reference surface is arranged below the touch light film in the longitudinal direction; the longitudinal coordinates of the first reference coordinate include L 0 and L 1 at two longitudinal ends, the longitudinal coordinates of the first projection coordinate include L 0 'and L 1' at two longitudinal ends, and the projection parameter includes a first distance C 0 between the center point of the first projection image in the longitudinal direction and the touch reference plane, then
C0＝[((L1`+L0`)/2)－((L1+L0)/2)]×[A/(L1－L0)]。
2. The method for detecting a touch light film according to claim 1, wherein the reflectivity of the reference line and the reflectivity of the projection surface are different;
the step of acquiring the first reference coordinate of the reference line according to the first reference image includes:
Acquiring the reference brightness of the first reference image, and performing binarization processing on the reference brightness of the first reference image;
And determining a first reference coordinate of the reference line according to the binarized bright-dark position.
3. The method for detecting a touch light film according to claim 2, wherein the step of obtaining the first projection coordinates according to the first projection image comprises:
Acquiring the projection brightness of the first projection image, and performing binarization processing on the projection brightness of the first projection image;
And determining a first projection coordinate of the first projection image according to the light and dark positions after binarization processing.
4. The method for detecting a touch light film according to claim 3, wherein the step of obtaining a reference image of a projection surface of the projection light curtain and obtaining a reference coordinate of a reference line according to the reference image comprises:
Moving the projection light curtain to the touch remote end, acquiring a second reference image of a projection surface of the projection light curtain, and acquiring a second reference coordinate of a reference line according to the second reference image; wherein the reference image further comprises a second reference image, the reference coordinates further comprising second reference coordinates;
The step of obtaining the projection image of the touch light film on the projection surface of the projection light curtain and obtaining the projection coordinate of the touch light film according to the projection image comprises the following steps:
Acquiring a second projection image of the projection light curtain projection surface, and acquiring second projection coordinates of the touch light film according to the second projection image; wherein the projection image further comprises a second projection image, and the projection coordinates further comprise second projection coordinates.
5. The method for detecting a touch light film according to claim 4, wherein the projection parameters further include a second distance C 1 between a center point of the second projected image in the longitudinal direction and the touch reference plane, and C 1 is determined according to the second reference coordinate and the second projected coordinate;
The projection parameters further include the tilt angle delta of the touch light film
Wherein, F 0 is the distance between the touch near end and the light film generator, F 1 is the distance between the touch far end and the light film generator.
6. The method of claim 3, wherein the reference line includes a longitudinal edge perpendicular to the touch light film and a transverse edge parallel to the touch light film, the longitudinal edge has a length a, the transverse edge has a length B, the longitudinal coordinates of the first reference coordinate include L 0 and L 1 at two longitudinal ends, the longitudinal coordinates of the first projection coordinate include L 0 'and L 1' at two longitudinal ends, and the projection parameter includes a touch light film thickness H, then
H＝[(L1`－L0`)/(L1－L0)]×A。
7. The method for detecting a touch light film according to claim 3, wherein the projection parameters further include a luminance uniformity value of the touch light film, the method further comprising:
acquiring brightness information of all pixel points of the first projection image, and calculating a brightness average value according to the brightness information;
calculating the brightness uniformity value of the touch control light film according to the brightness average value;
Wherein the brightness information is Di, and the brightness average value N is the number of pixels, then
The brightness uniformity value sigma of the touch light film
8. A detection apparatus for a touch light film, applying the detection method according to any one of claims 1 to 7, characterized in that the detection apparatus comprises:
The acquisition module is used for acquiring a reference image of a projection plane of the projection light curtain and acquiring a reference coordinate of a reference line according to the reference image; wherein the projection surface is provided with a reference line;
the acquisition module is also used for acquiring a projection image of the touch control light film on the projection surface of the projection light curtain and acquiring the projection coordinate of the touch control light film according to the projection image;
And the control module is used for combining the actual size of the reference line and the reference coordinate with the projection coordinate to determine the projection parameter of the touch control light film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010595212.4A CN111796715B (en) | 2020-06-24 | 2020-06-24 | Detection method and detection device for touch control light film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010595212.4A CN111796715B (en) | 2020-06-24 | 2020-06-24 | Detection method and detection device for touch control light film |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111796715A CN111796715A (en) | 2020-10-20 |
| CN111796715B true CN111796715B (en) | 2024-06-04 |
Family
ID=72803177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010595212.4A Active CN111796715B (en) | 2020-06-24 | 2020-06-24 | Detection method and detection device for touch control light film |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111796715B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109254481B (en) * | 2018-09-21 | 2021-07-13 | 上海易视计算机科技股份有限公司 | Optical film adjusting method and device, terminal and storage medium |
| CN116668653A (en) * | 2022-12-09 | 2023-08-29 | 吉猪信息科技(深圳)有限公司 | Interactive projection method, system and device for moving objects |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101149658A (en) * | 2007-11-05 | 2008-03-26 | 天津大学 | Photoelectric touch-screen |
| CN101815928A (en) * | 2007-10-02 | 2010-08-25 | 电子地图有限公司 | Method of capturing linear features along a reference-line across a surface for use in a map database |
| GB201110156D0 (en) * | 2011-06-16 | 2011-07-27 | Light Blue Optics Ltd | Touch-sensitive display devices |
| CN103135860A (en) * | 2011-12-02 | 2013-06-05 | 纬创资通股份有限公司 | Method for correcting rotation angle of optical touch module and optical touch module |
| CN103226411A (en) * | 2013-04-10 | 2013-07-31 | 苏州佳世达光电有限公司 | Interactive projection system and touch control interactive method thereof |
| CN106598361A (en) * | 2016-12-27 | 2017-04-26 | 美的智慧家居科技有限公司 | Projection touch device and domestic appliance |
| CN106780615A (en) * | 2016-11-23 | 2017-05-31 | 安徽慧视金瞳科技有限公司 | A kind of Projection surveying method based on intensive sampling |
| CN107085493A (en) * | 2016-02-16 | 2017-08-22 | 中强光电股份有限公司 | The method of adjustment of touch control projection system and its touch-control sensitivity |
| CN107390955A (en) * | 2017-07-19 | 2017-11-24 | 广东美的制冷设备有限公司 | Household electrical appliance and its control system and method and infrared laser multi-point touch control apparatus |
| CN108958614A (en) * | 2018-07-04 | 2018-12-07 | 维沃移动通信有限公司 | A kind of display control method and terminal |
| CN109002219A (en) * | 2018-08-03 | 2018-12-14 | 合肥联宝信息技术有限公司 | A kind of interaction positioning correction method and device |
| CN109975989A (en) * | 2019-03-27 | 2019-07-05 | 武汉华星光电技术有限公司 | Display device |
| CN110310336A (en) * | 2019-06-10 | 2019-10-08 | 青岛小鸟看看科技有限公司 | A kind of touch control projection system and image processing method |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140354602A1 (en) * | 2013-04-12 | 2014-12-04 | Impression.Pi, Inc. | Interactive input system and method |
| TWI534687B (en) * | 2014-01-24 | 2016-05-21 | 原相科技股份有限公司 | Optical touch detection system and object analyzation method thereof |
| TWI653563B (en) * | 2016-05-24 | 2019-03-11 | 仁寶電腦工業股份有限公司 | Projection touch image selection method |
-
2020
- 2020-06-24 CN CN202010595212.4A patent/CN111796715B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101815928A (en) * | 2007-10-02 | 2010-08-25 | 电子地图有限公司 | Method of capturing linear features along a reference-line across a surface for use in a map database |
| CN101149658A (en) * | 2007-11-05 | 2008-03-26 | 天津大学 | Photoelectric touch-screen |
| GB201110156D0 (en) * | 2011-06-16 | 2011-07-27 | Light Blue Optics Ltd | Touch-sensitive display devices |
| CN103135860A (en) * | 2011-12-02 | 2013-06-05 | 纬创资通股份有限公司 | Method for correcting rotation angle of optical touch module and optical touch module |
| CN103226411A (en) * | 2013-04-10 | 2013-07-31 | 苏州佳世达光电有限公司 | Interactive projection system and touch control interactive method thereof |
| CN107085493A (en) * | 2016-02-16 | 2017-08-22 | 中强光电股份有限公司 | The method of adjustment of touch control projection system and its touch-control sensitivity |
| CN106780615A (en) * | 2016-11-23 | 2017-05-31 | 安徽慧视金瞳科技有限公司 | A kind of Projection surveying method based on intensive sampling |
| CN106598361A (en) * | 2016-12-27 | 2017-04-26 | 美的智慧家居科技有限公司 | Projection touch device and domestic appliance |
| CN107390955A (en) * | 2017-07-19 | 2017-11-24 | 广东美的制冷设备有限公司 | Household electrical appliance and its control system and method and infrared laser multi-point touch control apparatus |
| CN108958614A (en) * | 2018-07-04 | 2018-12-07 | 维沃移动通信有限公司 | A kind of display control method and terminal |
| CN109002219A (en) * | 2018-08-03 | 2018-12-14 | 合肥联宝信息技术有限公司 | A kind of interaction positioning correction method and device |
| CN109975989A (en) * | 2019-03-27 | 2019-07-05 | 武汉华星光电技术有限公司 | Display device |
| CN110310336A (en) * | 2019-06-10 | 2019-10-08 | 青岛小鸟看看科技有限公司 | A kind of touch control projection system and image processing method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111796715A (en) | 2020-10-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11145038B2 (en) | Image processing method and device for adjusting saturation based on depth of field information | |
| US9172931B2 (en) | Projection display device, information processing device, projection display system, and program | |
| US10755417B2 (en) | Detection system | |
| US9759548B2 (en) | Image processing apparatus, projector and projector system including image processing apparatus, image processing method | |
| CN106851123B (en) | Exposure control method, exposure control device and electronic device | |
| JP6353289B2 (en) | Ranging correction device | |
| CN111796715B (en) | Detection method and detection device for touch control light film | |
| WO2015125298A1 (en) | Local location computation device and local location computation method | |
| US20110304746A1 (en) | Image capturing device, operator monitoring device, method for measuring distance to face, and program | |
| JP6237875B2 (en) | Self-position calculation device and self-position calculation method | |
| US10205928B2 (en) | Image processing apparatus that estimates distance information, method of controlling the same, and storage medium | |
| JPWO2009110082A1 (en) | Image photographing apparatus, image photographing method, and image photographing program | |
| CN110736610B (en) | Method and device for measuring optical center deviation, storage medium and depth camera | |
| CN107728410B (en) | Image distortion correction method for laser projector and laser projector | |
| WO2015125301A1 (en) | Local location computation device and local location computation method | |
| WO2015125296A1 (en) | Local location computation device and local location computation method | |
| JP2015130555A (en) | image processing apparatus, image processing method, and image projection apparatus | |
| JP2016178608A5 (en) | ||
| JP6214867B2 (en) | Measuring device, method and program | |
| JP2010286995A (en) | Image processing system for vehicle | |
| CN111127537A (en) | Method and apparatus for detecting shadows in a head mounted device | |
| KR101818104B1 (en) | Camera and camera calibration method | |
| JP6552230B2 (en) | Measuring device | |
| KR102306486B1 (en) | A method and apparatus for detecting wrinkle of skin using optical coherence tomography | |
| CN113484852B (en) | Distance measurement method and system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |