CN108282645A - A kind of projection touches the method, apparatus and smart projector of calibration and keystone - Google Patents
A kind of projection touches the method, apparatus and smart projector of calibration and keystone Download PDFInfo
- Publication number
- CN108282645A CN108282645A CN201810068561.3A CN201810068561A CN108282645A CN 108282645 A CN108282645 A CN 108282645A CN 201810068561 A CN201810068561 A CN 201810068561A CN 108282645 A CN108282645 A CN 108282645A
- Authority
- CN
- China
- Prior art keywords
- control point
- point
- touch
- control
- keystone
- 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.)
- Granted
Links
Classifications
-
- 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
- H04N9/3185—Geometric adjustment, e.g. keystone or convergence
-
- 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
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/10—Segmentation; Edge detection
- G06T7/13—Edge detection
-
- 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]
- H04N9/3141—Constructional details thereof
- H04N9/3173—Constructional details thereof wherein the projection device is specially adapted for enhanced portability
- H04N9/3176—Constructional details thereof wherein the projection device is specially adapted for enhanced portability wherein the projection device is incorporated in a camera
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/048—Indexing scheme relating to G06F3/048
- G06F2203/04808—Several contacts: gestures triggering a specific function, e.g. scrolling, zooming, right-click, when the user establishes several contacts with the surface simultaneously; e.g. using several fingers or a combination of fingers and pen
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/10—Image acquisition modality
- G06T2207/10004—Still image; Photographic image
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- General Engineering & Computer Science (AREA)
- Human Computer Interaction (AREA)
- Geometry (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Projection Apparatus (AREA)
- Transforming Electric Information Into Light Information (AREA)
- Position Input By Displaying (AREA)
Abstract
The invention discloses method, apparatus and smart projector that a kind of projection touches calibration and keystone, this method includes：Four control points are projected on target projection face using projection arrangement；First kind control point and the second class control point are divided into four control points by the coordinate information that four control points are obtained using video camera module according to the coordinate information at four control points；The control point for judging to be touched using video camera module starts keystone algorithm and carries out keystone when first kind control point is touched, and then starts touch calibration algorithm and carries out touch calibration；When the second class control point is touched, starts touch calibration algorithm and carry out touch calibration, and keep the optical projection ratio at the second class control point and optical shift amount constant when carrying out touch calibration；After four control points are touched, the touch calibration on target end perspective plane and keystone, while realizing keystone and touching and calibrating, simplify calibration flow, save the time, promotes user experience.
Description
Technical field
The present invention relates to smart projector field, more particularly to a kind of projection touches the method for calibration and keystone, dress
It sets and smart projector.
Background technology
In the routine use of projecting apparatus, the position of projecting apparatus will just can guarantee projection at a right angle with projection screen as far as possible
Effect, if can not ensure the vertical of the two, picture just will produce trapezoidal.Keystone usually has two kinds of methods:Optics is trapezoidal
Correction and digital keystone, optics keystone refer to adjusting trapezoidal mesh by adjusting the physical location of camera lens to reach
, another number keystone is to realize keystone by the method for software, current almost all of projecting apparatus manufacturer
All use digital keystone technology.It can be touched in addition, projecting apparatus launches the screen come, because touch screen is inevitably deposited
It in reasons such as certain errors, such as rotates, translation needs to carry out touch calibration to screen in use.
Smart projector currently on the market is all first to realize to touch calibration, then realizes the keystone of projecting apparatus again,
After will result in keystone in this way, since optics throws the change of ratio, the change of optical shift, touch calibration is insensitive, again
The problem of touching calibration.
Invention content
A kind of projection provided by the invention touches the method, apparatus and smart projector of calibration and keystone, to solve
Or part solves the problem above-mentioned.
According to an aspect of the invention, there is provided a kind of method that projection touches calibration and keystone, the method
Including：
Four control points are projected on target projection face using projection arrangement；
The coordinate information that four control points are obtained using video camera module is believed according to the coordinate at four control points
First kind control point and the second class control point are divided into four control points by breath；
The control point for judging to be touched using video camera module starts keystone when first kind control point is touched
Algorithm carries out keystone, when the first kind control point is corrected into rectangle, further starts touch calibration algorithm and is touched
Touch calibration；When the second class control point is touched, starts touch calibration algorithm and carry out touch calibration, and when carrying out touching calibration
Keep optical projection ratio and the optical shift amount at the second class control point constant；
After four control points are touched, terminate touch calibration and the keystone in the target projection face.
Optionally, first kind control is divided into four control points by the coordinate information according to four control points
System point and the second class control point include：
The relative distance that two adjacent control points two-by-two are calculated according to the coordinate information at four control points, according to every
The relative distance at a control point and its front and back two adjacent control point calculates each control point and its front and back two adjacent control
The angle that system point is formed, then divides into first kind control point, if acute angle then by the control point area if obtuse angle by the control point
It is divided into the second class control point.
Optionally, described to judge that the control point touched includes using video camera module：
The touch point coordinate information of touch point is obtained using video camera module；
According to the coordinate information of the touch point coordinate information and four control points, calculate the touch point with it is described
Minimum range between four control points,
If the minimum range is less than distance threshold, start timing, and judge when timing time reaches time threshold
The corresponding control point of the minimum range is touched；
If the minimum range is not up to time threshold not less than distance threshold or the timing time, user is prompted
Mobile touch point is simultaneously rejudged using video camera module.
Optionally, rectangular coordinate system is established on the target projection face, described four obtained using video camera module
The coordinate information at control point, and using video camera module obtain the touch point coordinate information be in the rectangular co-ordinate
The coordinate information fastened.
Optionally, the method further includes：After four control points are touched, the target projection face is detected
Testing result is included in the target projection face and popping up dialog box prompt user continuation or end by picture edge characteristic,
Determine whether to terminate touch calibration and the keystone in the target projection face according to the user's choice.
According to another aspect of the present invention, a kind of device of projection touch calibration and keystone, the dress are provided
Set including：
Projecting unit is configured as projecting four control points on target projection face using projection arrangement；
Control point discrimination unit is configured as obtaining the coordinate information at four control points, root using video camera module
First kind control point and the second class control point are divided into four control points according to the coordinate information at four control points；
Touch point judging unit is configured as judging the control point touched using video camera module；
Calibration and trapezoidal correction unit are touched, is configured as when first kind control point is touched, starts keystone and calculates
Method carries out keystone, when the first kind control point is corrected into rectangle, further starts touch calibration algorithm and is touched
Calibration；When the second class control point is touched, starts touch calibration algorithm and carry out touch calibration, and protected when carrying out touch calibration
Optical projection ratio and the optical shift amount for holding the second class control point are constant；
End unit is configured as after four control points are touched, terminating the touch in the target projection face
Calibration and keystone.
Optionally, the control point discrimination unit is specifically configured to：According to the coordinate information meter at four control points
The relative distance for calculating two adjacent control points two-by-two, it is opposite with its front and back two adjacent control point according to each control point
Distance calculates the angle that each control point is formed with its front and back two adjacent control point, if obtuse angle then by the control point area
It is divided into first kind control point, the second class control point then is divided into at the control point if acute angle.
Optionally, the touch point judging unit is specifically configured to：
Using video camera module obtain touch point touch point coordinate information, according to the touch point coordinate information with it is described
The coordinate information at four control points calculates the minimum range between the touch point and four control points, if the minimum
Distance is less than distance threshold, then starts timing, and judge that the minimum range is corresponding when timing time reaches time threshold
Control point is touched；If the minimum range is not up to time threshold not less than distance threshold or the timing time, carry
Show that user is moved touch point and rejudged using video camera module；
Wherein, rectangular coordinate system is established on the target projection face, four controls obtained using video camera module
Make point coordinate information, and using video camera module obtain the touch point coordinate information be in the rectangular coordinate system
On coordinate information.
Optionally, described device further includes：Display unit is detected, is configured as when four control points are touched
Afterwards, testing result is included in the target projection face and popping up dialogue by the picture edge characteristic for detecting the target projection face
Frame prompts user to continue or terminate, and determines whether the touch calibration for terminating the target projection face and ladder according to the user's choice
Shape corrects.
According to a further aspect of the invention, provide a kind of smart projector, including projection arrangement, video camera module,
Memory and processor, the memory are stored with keystone algorithm, touch calibration algorithm and control algolithm, and the control is calculated
Method can realize that above-mentioned projection touches the method and step of calibration and keystone when being executed by the processor.
The advantageous effect of the embodiment of the present invention is：Four control points are projected on target projection face using projection arrangement；Profit
The coordinate information that four control points are obtained with video camera module, distinguishes four control points according to the coordinate information at four control points
For first kind control point and the second class control point；The control point for judging to be touched using video camera module, at first kind control point
When being touched, starts keystone algorithm progress keystone and further opened when the first kind control point is corrected into rectangle
The dynamic calibration algorithm that touches carries out touch calibration；When the second class control point is touched, starts touch calibration algorithm and carry out touch school
Standard, and keep the optical projection ratio at the second class control point and optical shift amount constant when carrying out touch calibration；When four controls
After system point is touched, the touch calibration on target end perspective plane and keystone.This method provides be both to touch calibration
It is the control point of keystone, in the case where keeping optical projection ratio optical shift constant, realizes complete while keystone
It is calibrated at touching, without carrying out touch calibration again after carrying out keystone, simplifies calibration flow, save the time, carry
User experience is risen.
Description of the drawings
Fig. 1 is the method flow diagram that a kind of projection provided in an embodiment of the present invention touches calibration and keystone；
Fig. 2 is establishment of coordinate system schematic diagram；
Fig. 3 is perspective plane trapezoidal distortion schematic diagram；
Fig. 4 is the installation drawing that a kind of projection provided in an embodiment of the present invention touches calibration and keystone；
Fig. 5 is a kind of smart projector schematic diagram provided in an embodiment of the present invention.
Specific implementation mode
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention
Formula is described in further detail.Embodiment described in following exemplary embodiment does not represent consistent with the application
All embodiments.On the contrary, they are only and some aspects phase one as detailed in the attached claim, the application
The example of the device and method of cause.It is purpose rather than purport only merely for description specific embodiment in term used in this application
In limitation the application.In the application and "an" of singulative used in the attached claims, " described " and "the"
It is also intended to including most forms, unless context clearly shows that other meanings.
Fig. 1 is the method flow diagram that a kind of projection provided in an embodiment of the present invention touches calibration and keystone, such as Fig. 1 institutes
Show, this approach includes the following steps：
Step S11：Four control points are projected on target projection face using projection arrangement；
Step S12：The coordinate information that four control points are obtained using video camera module is believed according to the coordinate at four control points
First kind control point and the second class control point are divided into four control points by breath；Specially according to the coordinate information at four control points
The relative distance for calculating two adjacent control points two-by-two, according to the phase at each control point and its front and back two adjacent control point
It adjusts the distance, the angle that each control point is formed with its front and back two adjacent control point is calculated, if obtuse angle then by the control point
First kind control point is divided into, the second class control point then is divided into at the control point if acute angle.
Step S13：The control point for judging to be touched using video camera module starts when first kind control point is touched
Keystone algorithm carries out keystone, when the first kind control point is corrected into rectangle, further starts to touch to calibrate and calculate
Method carries out touch calibration；When the second class control point is touched, starts touch calibration algorithm and carry out touch calibration, and touched
It touches and keeps the optical projection ratio at the second class control point and optical shift amount constant when calibration；
Step S14：After four control points are touched, the touch calibration on target end perspective plane and keystone.
Wherein, judge that the control point touched is specially using video camera module in step S13：It is obtained using video camera module
Take the touch point coordinate information of touch point；According to the coordinate information of touch point coordinate information and four control points, touch point is calculated
Start timing, and reach in timing time if minimum range is less than distance threshold with the minimum range between four control points
Judge that the corresponding control point of minimum range is touched when time threshold；If minimum range is not less than distance threshold or timing time
Not up to time threshold is then prompted user to move touch point and is rejudged using video camera module.
Rectangular coordinate system is established on target projection face, the coordinate at four control points obtained using video camera module is believed
Breath, and using video camera module obtain touch point coordinate information be the coordinate information fastened in rectangular co-ordinate.
This method further includes：After four control points are touched, the picture edge characteristic in detection target projection face will be examined
It surveys result and is shown in target projection face and pops up dialog box prompt user and continue or terminate, determine whether according to the user's choice
The touch calibration on target end perspective plane and keystone.
For projection arrangement by taking projecting apparatus as an example, target projection face is desktop.Projector first is to desktop, shape on the table
At perspective plane, then projecting apparatus projects four control points on the perspective plane；It is provided with video camera module in projecting apparatus, utilizes this
Video camera module obtains four control points, and rectangular coordinate system is established as coordinate origin using one of control point, to obtain four
The coordinate information at a control point, as shown in Fig. 2, Fig. 2, which is rectangular coordinate system, establishes schematic diagram, wherein 201,202,203,204 are
Four control points, 203 be coordinate origin.The relative distance for calculating two adjacent control points successively, according to each control point with
The relative distance at its front and back two adjacent control point calculates what each control point was formed with its front and back two adjacent control point
Angle, then first kind control point is divided into if obtuse angle by the control point, and the second class then is divided at the control point if acute angle
Control point.Fig. 3 is perspective plane trapezoidal distortion schematic diagram, as shown in Fig. 2 left figures, is located at 201 He of the first control point in obtuse angle region
202 in trapezoidal top half, is located at the second control point 203 and 204 of acute angular areas in trapezoidal lower half portion, at this time happens is that
Upper trapezoid distorts, and as shown in Fig. 3 right figures, is located at first control point 301 and 302 in obtuse angle region in trapezoidal lower half portion, is located at
Second control point of acute angular areas 303 and 304 is in trapezoidal top half, at this time happens is that lower trapezoid distorts.It touches successively first
The first control point 201 and 202 or 301 and 302 is touched, starts keystone algorithm and carries out keystone, when the first kind control point
After 201 and 202 or 301 and 302 are corrected into rectangle, start and touch calibration algorithm pair the first control point 201 and 202 or 301 Hes
302 carry out touch calibration；Then the second control point 203 and 204 or 303 and 304 is touched successively, is started and is touched calibration algorithm progress
Touch calibration, touch calibration when keep the optical projection ratio and optical shift amount at the second class control point 203 and 204
It is constant.
When touch control point, coordinate information of the touch point in rectangular coordinate system is obtained using video camera module, is denoted as tactile
Point coordinates information is touched, according to the coordinate information of obtained touch point coordinate information and four control points, calculates touch point and four
Minimum range between control point starts timing, when timing time reaches this moment if minimum range is less than preset distance threshold
Judge that the corresponding control point of minimum range is effectively touched when preset time threshold；If minimum range is not less than preset distance
Threshold value illustrates that control point is not touched or timing time is not up to preset time threshold, illustrates that control point is touched
The time touched is too short, and display reminding meeting prompt user re-calibrates or calibrates on the projection surface this moment, when user touches again
It is rejudged using video camera module when control point.After four control points are effectively touched, the image side on perspective plane is detected
Edge feature illustrates to be completed at the same time keystone and touched to calibrate when the picture edge characteristic on perspective plane meets rectangular characteristic,
Then keystone is completed and touches in perspective plane pop-up dialog box prompt user and calibrates；When perspective plane picture edge characteristic not
When meeting rectangular characteristic, illustrate keystone and touch calibration deviation occur, then in perspective plane pop-up dialog box prompt user's weight
It is new to carry out keystone and trapezoidal calibration, the touch calibration for terminating perspective plane and trapezoidal is then determined whether according to the user's choice
Correction.
Fig. 4 is the installation drawing that a kind of projection provided in an embodiment of the present invention touches calibration and keystone, as shown in figure 3,
The device 40 includes：
Projecting unit 401 is configured as projecting four control points on target projection face using projection arrangement；
Control point discrimination unit 402 is configured as obtaining the coordinate information at four control points using video camera module,
First kind control point and the second class control point are divided into four control points according to the coordinate information at four control points；Specifically by with
It is set to：The relative distance that two adjacent control points two-by-two are calculated according to the coordinate information at four control points, according to each
The relative distance at control point and its front and back two adjacent control point calculates each control point and its front and back two adjacent control
The angle that point is formed, then divides into first kind control point by the control point if obtuse angle, then distinguishes the control point if acute angle
For the second class control point.
Touch point judging unit 403 is configured as judging the control point touched using video camera module；Specifically it is configured
For：The touch point coordinate information that touch point is obtained using video camera module, according to touch point coordinate information and four control points
Coordinate information calculates the minimum range between touch point and four control points, if minimum range is less than distance threshold, starts meter
When, and judge that the corresponding control point of minimum range is touched when timing time reaches time threshold；If minimum range is not less than
Distance threshold or timing time are not up to time threshold, then prompt user to move touch point and sentenced again using video camera module
It is disconnected；Wherein, rectangular coordinate system is established on target projection face, the coordinate at four control points obtained using video camera module is believed
Breath, and using video camera module obtain touch point coordinate information be the coordinate information fastened in rectangular co-ordinate.
Calibration and trapezoidal correction unit 404 are touched, is configured as when first kind control point is touched, keystone is started
Algorithm carries out keystone, when the first kind control point is corrected into rectangle, further starts touch calibration algorithm and is touched
Touch calibration；When the second class control point is touched, starts touch calibration algorithm and carry out touch calibration, and when carrying out touching calibration
Keep optical projection ratio and the optical shift amount at the second class control point constant；
End unit 405 is configured as after four control points are touched, the touch on target end perspective plane calibration and
Keystone.
The device further includes：Display unit is detected, is configured as after four control points are touched, target projection is detected
Testing result is included in target projection face and popping up dialog box prompt user continuation or end by the picture edge characteristic in face,
Touch calibration and the keystone on target end perspective plane are determined whether according to the user's choice.
Fig. 5 is a kind of smart projector schematic diagram provided in an embodiment of the present invention, as shown in figure 4, the smart projector 50
Including projection arrangement 501, video camera module 502, memory 503 and processor 504, wherein processor 504 and projection arrangement
501,502 three of video camera module constitutes a closed-loop control, and memory 503 is stored with keystone algorithm, touches calibration calculation
Method and control algolithm, wherein control algolithm can realize that above-mentioned projection touches calibration and trapezoidal school when being executed by processor 504
Positive method and step, this method have been elaborated in the embodiment that Fig. 1 is provided, and details are not described herein.
In various embodiments, memory 503 can be memory or nonvolatile memory.It is wherein non-volatile to deposit
Reservoir can be：Memory driver (such as hard disk drive), solid state disk, any kind of storage dish (such as CD, DVD),
Either similar storage medium or combination thereof.Memory can be：RAM (Radom Access Memory, arbitrary access
Memory), volatile memory, nonvolatile memory, flash memory.Further, nonvolatile memory and memory can as machine
Storage medium is read, the computer program executed by processor 404 can be stored thereon.
For device embodiments, since it corresponds essentially to embodiment of the method, so related place is referring to method reality
Apply the part explanation of example.The apparatus embodiments described above are merely exemplary, can select according to the actual needs
Some or all of module therein is selected to achieve the purpose of the solution of this embodiment.Those of ordinary skill in the art are not paying wound
In the case that the property made is worked, you can to understand and implement.
In conclusion projecting four control points on target projection face using projection arrangement；It is obtained using video camera module
The coordinate information at four control points, according to the coordinate information at four control points by four control points divide into first kind control point and
Second class control point；The control point for judging to be touched using video camera module starts trapezoidal when first kind control point is touched
Correcting algorithm carry out keystone, when the first kind control point is corrected into rectangle, further start touch calibration algorithm into
Row touches calibration；When the second class control point is touched, starts touch calibration algorithm and carry out touch calibration, and carrying out touch school
Keep optical projection ratio and the optical shift amount at the second class control point constant on time；After four control points are touched, inspection
The picture edge characteristic in target projection face is surveyed, and includes being according to user instruction determination on target projection face by testing result
The touch calibration on no target end perspective plane and keystone.This method provides be both the control for touching calibration and keystone
It is processed, in the case where keeping optical projection ratio optical shift constant, complete to touch calibration, nothing while realizing keystone
Touch calibration need to be carried out again after carrying out keystone, simplify calibration flow, save the time, the user experience is improved.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the scope of the present invention.It is all
Any modification, equivalent replacement, improvement and so within the spirit and principles in the present invention, are all contained in protection scope of the present invention
It is interior.
Claims (10)
1. a kind of method that projection touches calibration and keystone, which is characterized in that the method includes：
Four control points are projected on target projection face using projection arrangement；
The coordinate information that four control points are obtained using video camera module, will according to the coordinate information at four control points
First kind control point and the second class control point are divided into four control points；
The control point for judging to be touched using video camera module starts keystone algorithm when first kind control point is touched
Keystone is carried out, when the first kind control point is corrected into rectangle, further starts touch calibration algorithm and carries out touch school
It is accurate；When the second class control point is touched, starts touch calibration algorithm and carry out touch calibration, and kept when carrying out touch calibration
The optical projection ratio and optical shift amount at the second class control point are constant；
After four control points are touched, terminate touch calibration and the keystone in the target projection face.
2. the method as described in claim 1, which is characterized in that the coordinate information according to four control points will be described
First kind control point and the second class control point are divided into four control points：
The relative distance that two adjacent control points two-by-two are calculated according to the coordinate information at four control points, according to each control
The relative distance of system point and its front and back two adjacent control point calculates each control point and its front and back two adjacent control point
The angle of formation, then first kind control point is divided into if obtuse angle by the control point, then divides into the control point if acute angle
Second class control point.
3. the method as described in claim 1, which is characterized in that described to judge that the control point touched is wrapped using video camera module
It includes：
The touch point coordinate information of touch point is obtained using video camera module；
According to the coordinate information of the touch point coordinate information and four control points, the touch point and described four are calculated
Minimum range between control point,
If the minimum range is less than distance threshold, start timing, and when timing time reaches time threshold described in judgement
The corresponding control point of minimum range is touched；
If the minimum range is not up to time threshold not less than distance threshold or the timing time, user is prompted to move
Touch point is simultaneously rejudged using video camera module.
4. method as claimed in claim 3, which is characterized in that establish rectangular coordinate system on the target projection face, utilize
The coordinate information at four control points that video camera module obtains, and sat using the touch point that video camera module obtains
It is the coordinate information fastened in the rectangular co-ordinate to mark information.
5. the method as described in claim 1, which is characterized in that the method further includes：When four control points are touched
After touching, the picture edge characteristic in the target projection face is detected, includes in the target projection face and pop-up pair by testing result
Frame prompt user is talked about to continue or terminate, determine whether to terminate according to the user's choice the target projection face touch calibration and
Keystone.
6. a kind of projection touches the device of calibration and keystone, which is characterized in that described device includes：
Projecting unit is configured as projecting four control points on target projection face using projection arrangement；
Control point discrimination unit is configured as obtaining the coordinate information at four control points using video camera module, according to institute
First kind control point and the second class control point are divided into four control points by the coordinate information for stating four control points；
Touch point judging unit is configured as judging the control point touched using video camera module；
Touch calibration and trapezoidal correction unit, be configured as when first kind control point is touched, start keystone algorithm into
Row keystone further starts touch calibration algorithm and carries out touch calibration when the first kind control point is corrected into rectangle；
When the second class control point is touched, starts touch calibration algorithm and carry out touch calibration, and being kept when touch calibration should
The optical projection ratio and optical shift amount at the second class control point are constant；
End unit is configured as terminating the touch calibration in the target projection face after four control points are touched
And keystone.
7. device as claimed in claim 6, which is characterized in that the control point discrimination unit is specifically configured to：According to institute
The coordinate information for stating four control points calculates the relative distance at two adjacent control points two-by-two, before each control point and its
The relative distance at two adjacent control points afterwards calculates the angle that each control point is formed with its front and back two adjacent control point
Degree, then divides into first kind control point by the control point if obtuse angle, the second class control then is divided at the control point if acute angle
Point processed.
8. device as claimed in claim 6, which is characterized in that the touch point judging unit is specifically configured to：
The touch point coordinate information that touch point is obtained using video camera module, according to the touch point coordinate information and described four
The coordinate information at control point calculates the minimum range between the touch point and four control points, if the minimum range
Less than distance threshold, then start timing, and judges the corresponding control of the minimum range when timing time reaches time threshold
Point is touched；If the minimum range is not up to time threshold not less than distance threshold or the timing time, prompt to use
It moves touch point and is rejudged using video camera module in family；
Wherein, rectangular coordinate system is established on the target projection face, four control points obtained using video camera module
Coordinate information, and using video camera module obtain the touch point coordinate information be to be fastened in the rectangular co-ordinate
Coordinate information.
9. device as claimed in claim 6, which is characterized in that described device further includes：
Display unit is detected, is configured as after four control points are touched, detecting the image in the target projection face
Testing result is included in the target projection face and popping up dialog box prompt user continuation or end by edge feature, according to
The selection of user determines whether to terminate touch calibration and the keystone in the target projection face.
10. a kind of smart projector, which is characterized in that described including projection arrangement, video camera module, memory and processor
Memory is stored with keystone algorithm, touch calibration algorithm and control algolithm, the control algolithm and is executed by the processor
When can realize described in claim 1-5 any one projection touch calibration and keystone method and step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810068561.3A CN108282645B (en) | 2018-01-24 | 2018-01-24 | Method and device for projection touch calibration and trapezoidal correction and intelligent projector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810068561.3A CN108282645B (en) | 2018-01-24 | 2018-01-24 | Method and device for projection touch calibration and trapezoidal correction and intelligent projector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108282645A true CN108282645A (en) | 2018-07-13 |
| CN108282645B CN108282645B (en) | 2020-08-14 |
Family
ID=62804808
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810068561.3A Active CN108282645B (en) | 2018-01-24 | 2018-01-24 | Method and device for projection touch calibration and trapezoidal correction and intelligent projector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108282645B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111625151A (en) * | 2020-06-02 | 2020-09-04 | 吕嘉昳 | Method and system for accurately identifying contact position in deformation projection based on touch method |
| CN112911270A (en) * | 2021-01-14 | 2021-06-04 | 华中科技大学 | Image correction method for 100% offset three-dimensional sliced projection imaging system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104142760A (en) * | 2013-05-07 | 2014-11-12 | 索尼公司 | Interactive projection equipment and positioning method for interactive pen thereof |
| US20160091987A1 (en) * | 2014-09-26 | 2016-03-31 | Panasonic Intellectual Property Management Co., Ltd. | Projector |
| CN105979234A (en) * | 2016-06-13 | 2016-09-28 | Tcl集团股份有限公司 | Projection image correction method and projection device |
| US20170244943A1 (en) * | 2016-02-19 | 2017-08-24 | Sony Mobile Communications Inc. | Control device, control method, and program |
| US20170264875A1 (en) * | 2011-02-03 | 2017-09-14 | John G. Posa | Automatic correction of keystone distortion and other unwanted artifacts in projected images |
-
2018
- 2018-01-24 CN CN201810068561.3A patent/CN108282645B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170264875A1 (en) * | 2011-02-03 | 2017-09-14 | John G. Posa | Automatic correction of keystone distortion and other unwanted artifacts in projected images |
| CN104142760A (en) * | 2013-05-07 | 2014-11-12 | 索尼公司 | Interactive projection equipment and positioning method for interactive pen thereof |
| US20160091987A1 (en) * | 2014-09-26 | 2016-03-31 | Panasonic Intellectual Property Management Co., Ltd. | Projector |
| US20170244943A1 (en) * | 2016-02-19 | 2017-08-24 | Sony Mobile Communications Inc. | Control device, control method, and program |
| CN105979234A (en) * | 2016-06-13 | 2016-09-28 | Tcl集团股份有限公司 | Projection image correction method and projection device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111625151A (en) * | 2020-06-02 | 2020-09-04 | 吕嘉昳 | Method and system for accurately identifying contact position in deformation projection based on touch method |
| CN112911270A (en) * | 2021-01-14 | 2021-06-04 | 华中科技大学 | Image correction method for 100% offset three-dimensional sliced projection imaging system |
| CN112911270B (en) * | 2021-01-14 | 2021-12-17 | 华中科技大学 | Image correction method for 100% offset three-dimensional sliced projection imaging system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108282645B (en) | 2020-08-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10504242B2 (en) | Method and device for calibrating dual fisheye lens panoramic camera, and storage medium and terminal thereof | |
| US9147248B2 (en) | Hardware calibration of eye tracker | |
| US9800846B2 (en) | Gestural control of visual projectors | |
| US8398246B2 (en) | Real-time projection management | |
| JP5961945B2 (en) | Image processing apparatus, projector and projector system having the image processing apparatus, image processing method, program thereof, and recording medium recording the program | |
| US20220321850A1 (en) | Ultra-short-throw picture and screen alignment method and apparatus, and storage medium | |
| WO2016134534A1 (en) | Method for automatically adjusting camera and electronic device | |
| CN110456602B (en) | Projection pattern correction device, method and system of projection system | |
| WO2021031781A1 (en) | Method and device for calibrating projection image and projection device | |
| KR20140071330A (en) | Method and apparatus for calibrating an imaging device | |
| WO2017054334A1 (en) | Projection method, device, terminal, and computer storage medium | |
| CN108282645A (en) | A kind of projection touches the method, apparatus and smart projector of calibration and keystone | |
| US9733553B2 (en) | Information processing method for adjusting electronic device with projection function and electronic device with projection function | |
| US10318067B2 (en) | Corner generation in a projector display area | |
| US20160189361A1 (en) | Method for estimating distance, and system and computer-readable medium for implementing the method | |
| TWI567473B (en) | Projection alignment | |
| US9654749B2 (en) | Projection methods and projection devices | |
| US20190243456A1 (en) | Method and device for recognizing a gesture, and display device | |
| JP6062599B1 (en) | Portable information device, dimension measuring method, and dimension measuring program | |
| JPH05153532A (en) | Method and device for geometrically compensating optical computer input system | |
| JP2008085748A (en) | Image projection and display apparatus | |
| KR20190110311A (en) | Apparatus for calibrating for around view camera and method thereof | |
| JP2017075961A (en) | Mobile information device, size measurement method, and size measurement program | |
| US10664100B2 (en) | Misalignment detection | |
| KR20120137050A (en) | Method of image calibration for mobile projector |
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 | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210722 Address after: 264300 No. 699, Jiangjun South Road, Rongcheng City, Weihai City, Shandong Province Patentee after: Rongcheng goer Technology Co.,Ltd. Address before: 266104 Room 308, North Investment Street Service Center, Laoshan District, Qingdao, Shandong. Patentee before: GOERTEK TECHNOLOGY Co.,Ltd. |