CN111836441A - Control method and system for light during projection - Google Patents
Control method and system for light during projection Download PDFInfo
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- CN111836441A CN111836441A CN201910249691.1A CN201910249691A CN111836441A CN 111836441 A CN111836441 A CN 111836441A CN 201910249691 A CN201910249691 A CN 201910249691A CN 111836441 A CN111836441 A CN 111836441A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3179—Video signal processing therefor
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3179—Video signal processing therefor
- H04N9/3182—Colour adjustment, e.g. white balance, shading or gamut
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Abstract
The invention relates to the field of light control, in particular to a method and a system for controlling light during projection. The control method of the light during projection comprises the following steps: carrying out projection; in the illuminable region, the illumination brightness of an overlapping region, which is an overlapping portion of the illuminable region and the first projection region, is reduced for illumination. The illumination brightness of the overlapped part of the illuminable area and the first projection area is reduced, and the illumination brightness of other parts of the illuminable area is kept, so that personalized processing is realized, and the reading of physical materials by students and the watching of projection contents by students are not influenced.
Description
Technical Field
The invention relates to the field of light control, in particular to a method and a system for controlling light during projection.
Background
With the popularization of online remote teaching, more and more people choose to study online courses at home, and in order to give lessons to teachers as they are personally on the scene, more and more families use projectors to project teaching contents on mobile phones to a desktop for learning, however, students need to use some books to take notes and the like while listening to lessons in the learning process, so that in the whole process, if a fixed peripheral light source brightness irradiates the learning desktop of the students, the projection contents and the presentation of real objects (such as books, books and the like) can not achieve a better effect.
Such as: the student looks over the projection broadcast of relevant data through the projection, and the in-process of watching wants to use this to do some notes, need open the illumination unit, and because the luminance of illumination unit is fixed and its luminance is brighter for letting the student can clearly read the paper material, opens the illumination unit this moment and must influence the projection effect, and if do not open the illumination unit, the student can't clearly read the paper material again or do the note etc. will harm student's eyesight.
Disclosure of Invention
Therefore, it is necessary to provide a method for controlling light during projection, so as to solve the problem that the brightness of the light source cannot be timely and specifically adjusted by the peripheral light source according to the use state of the projection of the user. The specific technical scheme is as follows:
a control method of light during projection comprises the following steps:
carrying out projection;
in the illuminable region, the illumination brightness of an overlapping region, which is an overlapping portion of the illuminable region and the first projection region, is reduced for illumination.
Further, the "reducing the illumination brightness of the overlapping area for illumination" further includes the steps of: the illumination brightness of the non-overlapping area is kept unchanged.
Further, the first projection area is equal to the total projection area;
or the first projection area is equal to the projection area with the image;
or the first projection area is equal to a designated projection area.
Further, the "reducing the illumination brightness of the overlapping area for illumination" further includes the steps of:
reducing the partial illumination brightness of the overlapping area, or reducing the illumination brightness of the overlapping area to zero.
Further, the illuminable area is illuminated by the matrix light source;
in the illuminable region, the illumination brightness of the overlapping region is reduced by partially or fully turning off the matrix light source of the overlapping region.
Further, the "reducing the illumination brightness of the overlapping area for illumination" further includes the steps of:
and judging whether the illumination of the ambient light source exists, and if so, adjusting the illumination brightness of the overlapped area by combining the matrix light source and the ambient light source.
Further, the "reducing the illumination brightness of the overlapping area for illumination" further includes the steps of:
judging whether the attributes of the projected images meet preset conditions, and if so, keeping the illumination brightness of the overlapped area unchanged;
and if the attribute of the projected image does not meet the preset condition, reducing the illumination brightness of the overlapping area according to a preset rule.
Further, the method also comprises the following steps:
and projecting, shooting a projected image in the illuminable area, and defining the overlapping area according to the brightness of the projected image.
Further, the method also comprises the following steps:
and acquiring the parameters of the ambient light source, and adjusting the projection parameters according to the parameters of the ambient light source.
Further, the gray value of the ambient light source is calculated through an automatic white balance algorithm, gain coefficients of R, G, B three channels are further calculated, and the color saturation of the projected image is adjusted according to the related gain coefficients.
Further, before the "performing projection", the method further comprises the steps of:
calibrating the positions of the illumination area and the projection area to generate a mapping relation;
the calibrated illumination area is the illumination area.
Further, the "calibrating the illumination area and the projection area to generate a mapping relationship" further includes the steps of:
the illumination area and the projection area are calibrated to the same coordinate system.
In order to solve the technical problem, the control system of the light during projection is also provided, and the specific technical scheme is as follows:
a system for controlling light during projection, comprising: a projector, an illumination array and a control unit;
the illumination array is to: illuminating the illuminable area;
the projector is used for: projecting;
the control unit is used for: in the illuminable region, the illumination brightness of an overlapping region, which is an overlapping portion of the illuminable region and the first projection region, is reduced for illumination.
Further, the control unit is further configured to: the illumination brightness of the non-overlapping area is kept unchanged.
Further, the first projection area is equal to the total projection area;
or the first projection area is equal to the projection area with the image;
or the first projection area is equal to a designated projection area.
Further, the control unit is further configured to: reducing the partial illumination brightness of the overlapping area, or reducing the illumination brightness of the overlapping area to zero.
Further, the illumination array is a matrix light source;
the control unit is further configured to: in the illuminable region, the illumination brightness of the overlapping region is reduced by partially or fully turning off the matrix light source of the overlapping region.
Further, the control unit is further configured to: and judging whether the illumination of the ambient light source exists, and if so, adjusting the illumination brightness of the overlapped area by combining the matrix light source and the ambient light source.
Further, the control unit is further configured to: judging whether the attributes of the projected images meet preset conditions, and if so, keeping the illumination brightness of the overlapped area unchanged; and if the attribute of the projected image does not meet the preset condition, reducing the illumination brightness of the overlapping area according to a preset rule.
Further, the method also comprises the following steps: an image camera;
the image photographer is to: when projection is carried out, a projection image in an illuminable area is shot, and the projection image is sent to a control unit;
the control unit is used for: a projected image within the illuminable region is received and the overlap region is delineated based on the brightness of the projected image.
Further, the method also comprises the following steps: an image camera;
the image photographer is to: acquiring an environment light source parameter and sending the environment light source parameter to a control unit;
the control unit is further configured to: and receiving the ambient light source parameters, and adjusting the projection parameters according to the ambient light source parameters.
Further, the control unit is further configured to: and calculating the gray value of the ambient light source through an automatic white balance algorithm, further calculating R, G, B gain coefficients of three channels, and adjusting the chroma of the projected image according to the related gain coefficients.
Further, the control unit is further configured to: calibrating the positions of the illumination area and the projection area to generate a mapping relation; the calibrated illumination area is the illumination area.
Further, the control unit is further configured to: the illumination area and the projection area are calibrated to the same coordinate system.
The invention has the beneficial effects that: the illumination brightness of the overlapped part of the illuminable area and the first projection area is reduced, and the illumination brightness of other parts of the illuminable area is kept, so that personalized processing is realized, and the reading of physical materials by students and the watching of projection contents by students are not influenced.
Drawings
Fig. 1 is a flowchart illustrating a method for controlling light during projection according to an embodiment;
FIG. 2 is a schematic illustration of an embodiment of the overlap region of FIG. 1;
FIG. 3 is a schematic illustration of an embodiment of the overlap region 2;
FIG. 4 is a schematic illustration 3 of an overlap region according to an embodiment;
fig. 5 is a block diagram of a control system for light during projection according to an embodiment.
Description of reference numerals:
500. a control system of light in projection,
501. a projector,
502. the array is illuminated by light from a source,
503. a control unit.
Detailed Description
To explain technical contents, structural features, and objects and effects of the technical solutions in detail, the following detailed description is given with reference to the accompanying drawings in conjunction with the embodiments.
In this embodiment, a method for controlling light during projection may be applied to a system for controlling light during projection, where the system for controlling light during projection includes: the projector, the illumination array, the image shooting device and the control unit, in this embodiment, the illumination array is preferably a matrix light source, the image shooting device is preferably a camera, in other embodiments, the illumination array may also be composed of independent small illumination arrays which can be mechanically rotated (i.e. each small illumination array can be mechanically rotated to project light sources in different directions), and the image shooting device may also be other sensor elements which can shoot images.
Some terms in the present embodiment are explained first as follows:
an ambient light source: in particular, light sources other than the light source emitted by the illumination array mentioned in this embodiment are as follows: light source emitted by a household fluorescent lamp, and the like.
Referring to fig. 1, in this embodiment, a method for controlling light during projection is implemented as follows:
step S101: and (5) performing projection.
Step S102: in the illuminable region, the illumination brightness of an overlapping region, which is an overlapping portion of the illuminable region and the first projection region, is reduced for illumination.
In the present embodiment, the illumination brightness of the non-overlapping region is kept constant.
The following explains the above technical solution through a specific practical use scenario:
before the step S101 "performing projection", the method further includes the steps of:
calibrating the positions of the illumination area and the projection area to generate a mapping relation; the calibrated illumination area is the illumination area. The following specific embodiments can be adopted for the step: opening the illumination array to display alternately light and dark lattices, checking the projector to display alternately light and dark lattices in the same image, adjusting the position of the projector or the illumination array to overlap the light and dark lattices, acquiring the overlapped image by the camera, and establishing a position mapping relationship between the two images. In the present embodiment, the light and dark lattices are alternately displayed, but in other embodiments, different patterns such as circles and triangles may be alternately displayed.
After the position relation between the illumination area and the projection area is established, the illumination array is opened, and the area which can be illuminated by light is as follows: the illuminable area.
In the present embodiment, the first projection area may have the following three cases:
1. the first projection area is equal to the total projection area;
2. the first projection area is equal to the projection area with the image;
3. the first projection area is equal to the designated projection area.
The above three cases are exemplified as follows:
case 1, please refer to fig. 2, wherein a is an illuminable region, B is a projection region, B is a first projection region, and a portion where a and B overlap, in this case, B, i.e., B is also an overlap region.
In case 2, referring to fig. 3, a is an illuminable region, B is a projection region, and only a region C where an image is actually projected, and no image exists in a portion of the region B other than the region C, then C in this case is a first projection region, and a portion where a and C overlap is an overlap region, that is, C is an overlap region. In this case, the delineation of the overlapping regions may be as follows: the brightness of the projected content is obtained, the part with high brightness (namely the part with the projected content) is defined, and the defined part is the overlapping area.
In case 3, referring to fig. 4, a is an illuminable region, B is a designated projection region (in other embodiments, different projection regions may be pre-designated according to different requirements of a user), then B is a first projection region, and a portion where a and B overlap is an overlap region, then B is an overlap region.
It should be noted that, although the above three cases are exemplified in which the illuminable region includes the first projection region, in actual cases, there may be cases in which the illuminable region and the first projection region only partially overlap, or the first projection region is larger and the illuminable region is included, and these cases are not limited in the present invention.
In this embodiment, the step "calibrating the illumination area and the projection area to generate the mapping relationship" is preferably: the illumination area and the projection area are calibrated to the same coordinate system.
After the position mapping relationship between the illuminable area and the projection area is established, projection is performed, and in the illuminable area, the illumination brightness of the overlapping area is reduced to perform illumination (it should be noted that, at this time, the illumination unit may already be turned on and then projection is performed, or projection may be performed first, and then the illumination unit is turned on, and in any case, when the illumination unit and the projection unit operate simultaneously, the illumination brightness of the overlapping area is reduced to perform illumination), and the overlapping area is the overlapping portion of the illuminable area and the first projection area.
The following method can be specifically adopted: when projection is carried out, the camera acquires a projection image in an illuminable area in real time and sends the projection image to the control unit, the control unit receives the projection image and defines an overlapping area according to the brightness of the projection image (the brightness of a part with projection content is larger than that of a part without the projection content, so that the overlapping area can be preferably defined according to the brightness), the control unit sends an instruction for reducing the illumination brightness of the overlapping area according to the defined overlapping area, and the illumination array receives a corresponding instruction and executes the instruction. Wherein "reducing the illumination brightness of the overlapping region" may be reducing the illumination brightness of a portion of the overlapping region, or reducing the illumination brightness of the overlapping region to zero. In summary, the final effect is to make the overall brightness of the superposition of the illumination light source and the projection light source inside and outside the overlap region consistent.
Further, in this embodiment, the "reducing the illumination brightness of the overlapping area" further includes: and judging whether the illumination of the ambient light source exists, and if so, adjusting the illumination brightness of the overlapped area by combining the matrix light source and the ambient light source.
The above may be specifically as follows:
in a use scene, an image in an illuminable area is shot through a camera, the shot image is sent to a control unit, the control unit judges whether other ambient light sources such as fluorescent lamps in a room exist besides an illumination array or not through the image, if the ambient light sources exist, the overall light source brightness (namely the superposition of the illumination array brightness and the ambient light source brightness) adjacent outside an overlapping area (in the embodiment, five centimeters are preferred outside the overlapping area) is used as reference brightness, if the reference brightness exceeds a preset threshold, the partial illumination brightness of the overlapping area is reduced, and if the reference brightness does not exceed the preset threshold, the illumination brightness of the overlapping area is reduced to zero.
Or if the environment light source exists, calculating the brightness difference of the light source inside and outside the overlapping area, if the brightness difference exceeds a preset threshold, reducing the partial illumination brightness of the overlapping area, and if the brightness difference does not exceed the preset threshold, reducing the illumination brightness of the overlapping area to zero.
Through the mode, the illumination brightness of the overlapping area is reduced adaptively along with different intensities of the ambient light sources when the ambient light sources exist, and the effect that the illumination brightness inside and outside the overlapping area is generally consistent is achieved.
Further, the "reducing the illumination brightness of the overlapped region therein" further includes the steps of: judging whether the attributes of the projected images meet preset conditions, and if so, keeping the illumination brightness of the overlapped area unchanged; and if the attribute of the projected image does not meet the preset condition, reducing the illumination brightness of the overlapping area according to a preset rule.
The above may be specifically as follows:
the camera shoots a projected image and sends the projected image to the control unit, the control unit judges the attributes of the projected image (wherein the attributes of the projected image comprise image brightness, image color saturation, line definition and the like) and judges whether the attributes meet preset conditions, and if the attributes of the projected image meet the preset conditions (which indicates that the presentation effect of the projected image is good), the illumination brightness of an overlapped area is kept unchanged; if the attributes of the projected images do not meet the preset conditions, whether the brightness difference value between the overlapped area and the non-overlapped area exceeds a preset threshold value or not is calculated, if the brightness difference value between the overlapped area and the non-overlapped area exceeds the preset threshold value, the illumination brightness of the overlapped area is reduced to zero, and if the brightness difference value between the overlapped area and the non-overlapped area does not exceed the preset threshold value, the partial illumination brightness of the overlapped area is reduced.
Through the mode, according to different projection image attributes, the illumination brightness of the overlapping area is reduced adaptively, and a better projection effect is achieved.
In this embodiment, the illumination array is preferably a matrix light source, and the illumination brightness of the overlapping region can be reduced by partially or fully turning off the matrix light source corresponding to the overlapping region.
In other embodiments, the illumination brightness of the overlapping region may also be reduced by partially or completely rotating the light source illuminating the overlapping region away from the direction of the overlapping region.
In this embodiment, when there is an ambient light source, such as a fluorescent lamp, the method may further include the steps of: and acquiring the parameters of the ambient light source, and adjusting the projection parameters according to the parameters of the ambient light source. In the step, the influence of the chromaticity is mainly considered, so that the chromaticity of the environment light source is obtained through the camera, and the projection brightness is adjusted according to the chromaticity of the environment light source (specifically, when the chromaticity of the environment light source is darker, the projection brightness is properly adjusted to be higher, and when the chromaticity of the environment light source is brighter, the projection brightness is properly adjusted to be lower). Furthermore, the chroma of the projected image can be adjusted according to the chroma of the environment light source (specifically, the gray value of the environment light source is calculated through an automatic white balance algorithm, then the gain coefficients of R, G, B three channels are calculated, and the chroma of the projected image is adjusted according to the related gain coefficients). Through the steps, the bidirectional linkage adjustment of the projector and the illumination array can be realized, and a better effect of projecting and reading solid materials is achieved.
The specific application scenarios of all the steps can be as follows: a student starts an illumination unit to start homework or read a book, and when the student encounters some incomprehensible problems in the process, the student needs to use a mobile phone or other electronic products to look up some data or learn some online courses, the contents are projected through a projection unit, and after the projection is opened, the illumination brightness of the overlapped area part of an illuminable area and a projection content area is automatically reduced, so that the final lighting effect does not influence the student to continuously read paper materials or influence the projection effect.
Or
A student uses a mobile phone or other electronic products to look up some data or learn some online courses, projects the contents through a projection unit, and in the projection process, some notes need to be taken, then an illumination unit is started, and after the illumination unit is started, in an illumination area, the illumination brightness of an overlapped area is reduced for illumination, so that the final light effect does not influence the student to continue reading paper materials, and the projection effect is not influenced.
The illumination brightness of the overlapped part of the illuminable area and the first projection area is reduced, and the illumination brightness of other parts of the illuminable area is kept, so that personalized processing is realized, and the reading of paper plate materials by students and the watching of projection contents by the students are not influenced.
Referring to fig. 5, in this embodiment, a specific embodiment of a system 500 for controlling light during projection is as follows:
a system 500 for controlling light during projection, comprising: a projector 501, an illumination array 502, and a control unit 503; the illumination array 502 is configured to: illuminating the illuminable area; the projector 501 is configured to: projecting; the control unit 503 is configured to: in the illuminable region, the illumination brightness of an overlapping region, which is an overlapping portion of the illuminable region and the first projection region, is reduced for illumination.
Further, the control unit 503 is further configured to: the illumination brightness of the non-overlapping area is kept unchanged.
Further, the control unit 503 is further configured to: calibrating the positions of the illumination area and the projection area to generate a mapping relation; the calibrated illumination area is the illumination area. The following embodiments can be specifically adopted: opening the illumination array 502 to display alternately light and dark lattices, clicking the projector 501 to display alternately light and dark lattices in the image projected by the projector, overlapping the light and dark lattices in the projector 501 or the illumination array 502 by adjusting the position of the projector, acquiring the overlapped image by a camera, and establishing a position mapping relationship between the two images. In the present embodiment, the light and dark lattices are alternately displayed, but in other embodiments, different patterns such as circles and triangles may be alternately displayed.
After the positional relationship between the illumination area and the projection area is established, the illumination array 502 is turned on, and the area that can be illuminated by the illumination array is: the illuminable area.
In the present embodiment, the first projection area may have the following three cases:
1. the first projection area is equal to the total projection area;
2. the first projection area is equal to the projection area with the image;
3. the first projection area is equal to the designated projection area.
The above three cases are exemplified as follows:
case 1, please refer to fig. 2, wherein a is an illuminable region, B is a projection region, B is a first projection region, and a portion where a and B overlap, in this case, B, i.e., B is also an overlap region.
In case 2, referring to fig. 3, a is an illuminable region, B is a projection region, and only a region C where an image is actually projected, and no image exists in a portion of the region B other than the region C, then C in this case is a first projection region, and a portion where a and C overlap is an overlap region, that is, C is an overlap region. In this case, the delineation of the overlapping regions may be as follows: the brightness of the projected content is obtained, the part with high brightness (namely the part with the projected content) is defined, and the defined part is the overlapping area.
In case 3, please refer to fig. 4, a is an illuminable region, B is a projection region, C is a designated projection region (in other embodiments, different projection regions may be pre-designated according to different requirements of a user, and a plurality of projection regions may be designated), then C is a first projection region, and a portion where a and C overlap is an overlap region, then C is an overlap region.
It should be noted that, although the above three cases are exemplified in which the illuminable region includes the first projection region, in actual cases, there may be cases in which the illuminable region and the first projection region only partially overlap, or the first projection region is larger and the illuminable region is included, and these cases are not limited in the present invention.
In this embodiment, preferably, the control unit 503 is further configured to: the illumination area and the projection area are calibrated to the same coordinate system.
Further, the control unit 503 is further configured to: reducing the partial illumination brightness of the overlapping area, or reducing the illumination brightness of the overlapping area to zero. The following method can be specifically adopted: when projection is performed, the camera acquires a projection image in an illuminable area in real time and sends the projection image to the control unit 503, the control unit 503 receives the projection image and defines an overlapping area according to the brightness of the projection image (the brightness of a part with projection content is larger than that of a part without projection content, so that the overlapping area can be preferably defined according to the brightness), the control unit 503 sends an instruction for reducing the illumination brightness of the overlapping area according to the defined overlapping area, and the illumination array 502 receives a corresponding instruction and executes the instruction. Wherein "reducing the illumination brightness of the overlapping region" may be reducing the illumination brightness of a portion of the overlapping region, or reducing the illumination brightness of the overlapping region to zero. In summary, the final effect is to make the overall brightness of the superposition of the illumination light source and the projection light source inside and outside the overlap region consistent.
Further, the illumination array 502 is a matrix light source; the control unit 503 is further configured to: in the illuminable region, the illumination brightness of the overlapping region is reduced by partially or fully turning off the matrix light source of the overlapping region.
Further, the control unit 503 is further configured to: and judging whether the illumination of the ambient light source exists, and if so, adjusting the illumination brightness of the overlapped area by combining the matrix light source and the ambient light source. The method can be specifically as follows:
in a use scene, an image in an illuminable area is shot through a camera, the shot image is sent to a control unit 503, the control unit 503 judges whether other ambient light sources, such as fluorescent lamps in a room, exist besides the illumination array 502 through the image, if the ambient light sources exist, the brightness of the light sources outside the overlapping area is used as reference brightness, if the reference brightness exceeds a preset threshold, the partial illumination brightness of the overlapping area is reduced, and if the reference brightness does not exceed the preset threshold, the illumination brightness of the overlapping area is reduced to zero.
Through the mode, the illumination brightness of the overlapping area is reduced adaptively along with different intensities of the ambient light sources when the ambient light sources exist, and the effect that the illumination brightness inside and outside the overlapping area is generally consistent is achieved.
Further, the control unit 503 is further configured to: judging whether the attributes of the projected images meet preset conditions, and if so, keeping the illumination brightness of the overlapped area unchanged; and if the attribute of the projected image does not meet the preset condition, reducing the illumination brightness of the overlapping area according to a preset rule. The above may be specifically as follows:
the camera shoots a projected image and sends the projected image to the control unit 503, the control unit 503 judges the attributes of the projected image (wherein the attributes of the projected image include image brightness, image color saturation, line definition, and the like) and judges whether the attributes meet preset conditions, and if the attributes of the projected image meet the preset conditions (which indicates that the rendering effect of the projected image is good), the illumination brightness of the overlapped area is kept unchanged; if the attributes of the projected images do not meet the preset conditions, whether the brightness difference value between the overlapped area and the non-overlapped area exceeds a preset threshold value or not is calculated, if the brightness difference value between the overlapped area and the non-overlapped area exceeds the preset threshold value, the illumination brightness of the overlapped area is reduced to zero, and if the brightness difference value between the overlapped area and the non-overlapped area does not exceed the preset threshold value, the partial illumination brightness of the overlapped area is reduced.
Through the mode, according to different projection image attributes, the illumination brightness of the overlapping area is reduced adaptively, and a better projection effect is achieved.
Further, the method also comprises the following steps: an image camera; the image photographer is to: when performing projection, a projection image in an illuminable area is captured, and the projection image is transmitted to the control unit 503; the control unit 503 is configured to: a projected image within the illuminable region is received and the overlap region is delineated based on the brightness of the projected image.
Further, the method also comprises the following steps: an image camera; the image photographer is to: acquiring an ambient light source parameter, and sending the ambient light source parameter to the control unit 503; the control unit 503 is further configured to: and receiving the ambient light source parameters, and adjusting the projection parameters according to the ambient light source parameters.
Further, the control unit 503 is further configured to: and calculating the gray value of the ambient light source through an automatic white balance algorithm, further calculating R, G, B gain coefficients of three channels, and adjusting the chroma of the projected image according to the related gain coefficients.
The control unit 503 in the light control system 500 for projection reduces the illumination brightness of the overlapped region of the illuminable region and the first projection region, and maintains the illumination brightness of the other parts of the illuminable region, so as to achieve personalized processing, and not affect the students to read the material, nor view the projection content.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal 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 terminal. Without further limitation, an element defined by the phrases "comprising … …" or "comprising … …" does not exclude the presence of additional elements in a process, method, article, or terminal that comprises the element. Further, herein, "greater than," "less than," "more than," and the like are understood to exclude the present numbers; the terms "above", "below", "within" and the like are to be understood as including the number.
It should be noted that, although the above embodiments have been described herein, the invention is not limited thereto. Therefore, based on the innovative concepts of the present invention, the technical solutions of the present invention can be directly or indirectly applied to other related technical fields by making changes and modifications to the embodiments described herein, or by using equivalent structures or equivalent processes performed in the content of the present specification and the attached drawings, which are included in the scope of the present invention.
Claims (24)
1. A control method of light during projection is characterized by comprising the following steps:
carrying out projection;
in the illuminable region, the illumination brightness of an overlapping region, which is an overlapping portion of the illuminable region and the first projection region, is reduced for illumination.
2. A method for controlling light during projection according to claim 1,
the method for reducing the illumination brightness of the overlapped area for illumination further comprises the following steps: the illumination brightness of the non-overlapping area is kept unchanged.
3. A method for controlling light during projection according to claim 1,
the first projection area is equal to the total projection area;
or the first projection area is equal to the projection area with the image;
or the first projection area is equal to a designated projection area.
4. A method for controlling light during projection according to claim 1,
the method for reducing the illumination brightness of the overlapped area for illumination further comprises the following steps:
reducing the partial illumination brightness of the overlapping area, or reducing the illumination brightness of the overlapping area to zero.
5. A method for controlling light during projection according to claim 4,
illuminating the illuminable area by the matrix light source;
in the illuminable region, the illumination brightness of the overlapping region is reduced by partially or fully turning off the matrix light source of the overlapping region.
6. A method for controlling light during projection according to claim 4,
the method for reducing the illumination brightness of the overlapped area for illumination further comprises the following steps:
and judging whether the illumination of the ambient light source exists, and if so, adjusting the illumination brightness of the overlapped area by combining the matrix light source and the ambient light source.
7. A method for controlling light during projection according to claim 4,
the method for reducing the illumination brightness of the overlapped area for illumination further comprises the following steps:
judging whether the attributes of the projected images meet preset conditions, and if so, keeping the illumination brightness of the overlapped area unchanged;
and if the attribute of the projected image does not meet the preset condition, reducing the illumination brightness of the overlapping area according to a preset rule.
8. A method for controlling light during projection according to claim 1, further comprising the steps of:
and projecting, shooting a projected image in the illuminable area, and defining the overlapping area according to the brightness of the projected image.
9. A method for controlling light during projection according to claim 1, further comprising the steps of:
and acquiring the parameters of the ambient light source, and adjusting the projection parameters according to the parameters of the ambient light source.
10. The method for controlling light during projection according to claim 9,
and calculating the gray value of the ambient light source through an automatic white balance algorithm, further calculating R, G, B gain coefficients of three channels, and adjusting the chroma of the projected image according to the related gain coefficients.
11. The method for controlling light during projection according to any one of claims 1 to 10,
before the projection, the method also comprises the following steps:
calibrating the positions of the illumination area and the projection area to generate a mapping relation;
the calibrated illumination area is the illumination area.
12. The method for controlling light during projection according to claim 11,
the step of calibrating the illumination area and the projection area to generate a mapping relation between the illumination area and the projection area further comprises the following steps:
the illumination area and the projection area are calibrated to the same coordinate system.
13. A control system of light during projection, characterized by comprising: a projector, an illumination array and a control unit;
the illumination array is to: illuminating the illuminable area;
the projector is used for: projecting;
the control unit is used for: in the illuminable region, the illumination brightness of an overlapping region, which is an overlapping portion of the illuminable region and the first projection region, is reduced for illumination.
14. A control system for light during projection as claimed in claim 13,
the control unit is further configured to: the illumination brightness of the non-overlapping area is kept unchanged.
15. A control system of light during projection as claimed in claim 13,
the first projection area is equal to the total projection area;
or the first projection area is equal to the projection area with the image;
or the first projection area is equal to a designated projection area.
16. A control system of light during projection as claimed in claim 13,
the control unit is further configured to: reducing the partial illumination brightness of the overlapping area, or reducing the illumination brightness of the overlapping area to zero.
17. A control system of light during projection as claimed in claim 16,
the illumination array is a matrix light source;
the control unit is further configured to: in the illuminable region, the illumination brightness of the overlapping region is reduced by partially or fully turning off the matrix light source of the overlapping region.
18. A control system of light during projection as claimed in claim 16,
the control unit is further configured to: and judging whether the illumination of the ambient light source exists, and if so, adjusting the illumination brightness of the overlapped area by combining the matrix light source and the ambient light source.
19. A control system of light during projection as claimed in claim 16,
the control unit is further configured to: judging whether the attributes of the projected images meet preset conditions, and if so, keeping the illumination brightness of the overlapped area unchanged; and if the attribute of the projected image does not meet the preset condition, reducing the illumination brightness of the overlapping area according to a preset rule.
20. A control system for lighting during projection as claimed in claim 13, further comprising: an image camera;
the image photographer is to: when projection is carried out, a projection image in an illuminable area is shot, and the projection image is sent to a control unit;
the control unit is used for: a projected image within the illuminable region is received and the overlap region is delineated based on the brightness of the projected image.
21. A control system for lighting during projection as claimed in claim 13, further comprising: an image camera;
the image photographer is to: acquiring an environment light source parameter and sending the environment light source parameter to a control unit;
the control unit is further configured to: and receiving the ambient light source parameters, and adjusting the projection parameters according to the ambient light source parameters.
22. A control system for light during projection as claimed in claim 21,
the control unit is further configured to: and calculating the gray value of the ambient light source through an automatic white balance algorithm, further calculating R, G, B gain coefficients of three channels, and adjusting the chroma of the projected image according to the related gain coefficients.
23. A control system for light during projection according to any one of claims 13 to 22,
the control unit is further configured to: calibrating the positions of the illumination area and the projection area to generate a mapping relation; the calibrated illumination area is the illumination area.
24. A control system for light during projection as claimed in claim 23,
the control unit is further configured to: the illumination area and the projection area are calibrated to the same coordinate system.
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