CN103257750B - The touch identification method of optical imaging touch screen and device - Google Patents
The touch identification method of optical imaging touch screen and device Download PDFInfo
- Publication number
- CN103257750B CN103257750B CN201310179741.6A CN201310179741A CN103257750B CN 103257750 B CN103257750 B CN 103257750B CN 201310179741 A CN201310179741 A CN 201310179741A CN 103257750 B CN103257750 B CN 103257750B
- Authority
- CN
- China
- Prior art keywords
- angle
- touch
- camera
- line
- screen
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Studio Devices (AREA)
- User Interface Of Digital Computer (AREA)
- Image Analysis (AREA)
Abstract
The invention discloses a kind of touch identification method of optical imaging touch screen, comprising: calculate the first angle corresponding to demarcation touch objects and the second angle that are positioned on touch-screen; Set the 3rd angle; By the scope between described camera zero degree line and the 3rd line, be identified as the effective range of described first camera.In addition, a kind of touch recognition device of optical imaging touch screen is also disclosed.The present invention determines the lower boundary position (i.e. the determined scope of described 3rd angle) of the effective identification range of camera by demarcating touch objects, it is invalid the touch objects be positioned at outside described camera zero degree line and the 3rd line to be identified as, and the touching object imaging also namely outside described lower boundary is considered as invalid touch.The virtual image that the mirror-reflection because of touch-screen side reflectorized material causes can be weeded out so exactly, only retain real touch objects real image, thus avoid the generation touching erroneous judgement.
Description
Technical field
The present invention relates to optical imaging touch screen technical field, particularly relate to a kind of touch identification method of optical imaging touch screen and a kind of touch recognition device of optical imaging touch screen.
Background technology
Optical imaging touch screen a kind ofly on two angles of screen, installs camera (such as infrared camera), calculated the touch-screen of position, touch point by the positional information of touch objects in two cameras.Optical imaging touch screen is that the left upper right corner respectively has a camera.If have touching object to enter touch area block the light that part enters camera, then camera can calculate angle according to the location of pixels being blocked part place, then obtains coordinate by two, left and right angle.
Fig. 1 is the image that a camera photographed, and white bright wisp region is the region at reflectorized material place, i.e. effective touch area.When there being touching object to enter, as shown in Figure 2, the position that square frame circle is lived, the breakpoint (one piece of dark space) that white bright wisp occurs is exactly the effect that object blocks that is touched.Fig. 3 is the image that touch-screen upper left side camera photographs, and wherein vertical line is for separating the position of mark right side, base and left side reflectorized material.Fig. 4 is the image comparison figure that touch-screen upper left side camera photographed, and does not have touch objects, have touch objects in lower images in upper images, as can see from Figure 4 a real image and a virtual image (being identified by square frame respectively).The virtual image is that side reflectorized material formation mirror-reflection caused, and in touch recognition process, the virtual image is easily identified as real image (i.e. touch objects), thus causes touch recognition to be judged by accident.
For solving the touch recognition erroneous judgement problem that the above-mentioned virtual image brings, common practices improves recognition threshold to distinguish real image and the virtual image.General real image can be darker than the virtual image, can be lower on pixel grey scale, so adopt the method improving threshold value, can solve the differentiation problem of real image and the virtual image to a certain extent.But because the gray scale of the real image in some region is on the touchscreen often also low not, namely both exist and occur simultaneously in gray scale.So adopt the way improving threshold value likely to cause not identify some real image in this case.In addition, if when the gray scale of some virtual image is lower, above-mentioned way will be identified as real image the virtual image.Therefore, adopt current way, still real image and the virtual image cannot be made a distinction completely in some cases, the generation touching erroneous judgement cannot be avoided.
Summary of the invention
Based on this, the invention provides a kind of touch identification method of optical imaging touch screen and a kind of touch recognition device of optical imaging touch screen.
A touch identification method for optical imaging touch screen, comprises the following steps:
Calculate the first angle corresponding to demarcation touch objects and the second angle that are positioned on touch-screen; Wherein, described first angle is the angle between camera zero degree line and the first line, described second angle is the angle between described camera zero degree line and the second line, described first line is the line between the real image of the described demarcation touch objects that the first camera photographs and described first camera, and described second line is the line between the virtual image of the described demarcation touch objects that described first camera photographs and described first camera;
Set the 3rd angle; Wherein, the numerical value of described 3rd angle is between described first angle and described second angle;
By the scope between described camera zero degree line and the 3rd line, be identified as the effective range of described first camera; Wherein, described 3rd line is through the position of described first camera, and the angle between described camera zero degree line is described 3rd angle, and between described first line and described second line.
Compared with general technology, the touch identification method of optical imaging touch screen of the present invention determines the lower boundary position (i.e. the determined scope of described 3rd angle) of the effective identification range of camera by demarcating touch objects, it is invalid the touch objects be positioned at outside described camera zero degree line and the 3rd line to be identified as, and the touching object imaging also namely outside described lower boundary is considered as invalid touch.The virtual image that the mirror-reflection because of touch-screen side reflectorized material causes can be weeded out so exactly, only retain real touch objects real image, thus avoid the generation touching erroneous judgement.
A touch recognition device for optical imaging touch screen, comprises computing module, setting module and identification module;
Described computing module, for calculating the first angle corresponding to the demarcation touch objects that is positioned on touch-screen and the second angle; Wherein, described first angle is the angle between camera zero degree line and the first line, described second angle is the angle between described camera zero degree line and the second line, described first line is the line between the real image of the described demarcation touch objects that the first camera photographs and described first camera, and described second line is the line between the virtual image of the described demarcation touch objects that described first camera photographs and described first camera;
Described setting module, for setting the 3rd angle; Wherein, the numerical value of described 3rd angle is between described first angle and described second angle;
Described identification module, for by the scope between described camera zero degree line and the 3rd line, is identified as the effective range of described first camera; Wherein, described 3rd line is through the position of described first camera, and the angle between described camera zero degree line is described 3rd angle, and between described first line and described second line.
Compared with general technology, the touch recognition device of optical imaging touch screen of the present invention determines the lower boundary position (i.e. the determined scope of described 3rd angle) of the effective identification range of camera by demarcating touch objects, it is invalid the touch objects be positioned at outside described camera zero degree line and the 3rd line to be identified as, and the touching object imaging also namely outside described lower boundary is considered as invalid touch.The virtual image that the mirror-reflection because of touch-screen side reflectorized material causes can be weeded out so exactly, only retain real touch objects real image, thus avoid the generation touching erroneous judgement.
Accompanying drawing explanation
The schematic diagram of camera shooting image when Fig. 1 is no touch thing;
Fig. 2 is the schematic diagram of camera shooting image when having touch objects;
Fig. 3 is the region segmentation schematic diagram of camera shooting image;
Fig. 4 is the contrast schematic diagram of camera shooting image;
Fig. 5 is the schematic flow sheet of the touch identification method of optical imaging touch screen of the present invention;
Fig. 6 is the generation schematic diagram of real image and the virtual image on touch-screen;
Fig. 7 is the present invention to the differentiation schematic diagram of real image and the virtual image;
Fig. 8 is the structural representation of the touch recognition device of optical imaging touch screen of the present invention.
Embodiment
For further setting forth the technological means that the present invention takes and the effect obtained, below in conjunction with accompanying drawing and preferred embodiment, to technical scheme of the present invention, carry out clear and complete description.
Referring to Fig. 5, is the schematic flow sheet of the touch identification method of optical imaging touch screen of the present invention.The touch identification method of optical imaging touch screen of the present invention, comprises the following steps:
S101 calculates the first angle corresponding to demarcation touch objects and the second angle that are positioned on touch-screen; Wherein, described first angle is the angle between camera zero degree line and the first line, described second angle is the angle between described camera zero degree line and the second line, described first line is the line between the real image of the described demarcation touch objects that the first camera photographs and described first camera, and described second line is the line between the virtual image of the described demarcation touch objects that described first camera photographs and described first camera;
S102 sets the 3rd angle; Wherein, the numerical value of described 3rd angle is between described first angle and described second angle;
S103, by the scope between described camera zero degree line and the 3rd line, is identified as the effective range of described first camera; Wherein, described 3rd line is through the position of described first camera, and the angle between described camera zero degree line is described 3rd angle, and between described first line and described second line.
In step S101, described camera zero degree line is the first camera on touch-screen and the line between second camera.
As shown in Figure 6, near camera homonymy side (being also described first side) reflectorized material, demarcation touch objects is put into.Also can place in other position of touch-screen and demarcate touch objects, but want in the image that camera will be made to take to distinguish real image and the virtual image.
As one of them embodiment, described demarcation touch objects is opaque article.
Demarcate touch objects to stop owing to producing light, in the image that camera is photographed, there is breakpoint in white bright wisp.Camera can be regarded as out angle according to the location of pixels being blocked part place, and then obtains its coordinate.
As one of them embodiment, described demarcation touch objects is positioned over distance first side on touch-screen and is less than or equal to the position of preset length; Wherein, described first side is crossing with top margin and minimum apart from described first camera limit, and described top margin is the limit at described first camera and described second camera place.
Such as, described preset length is that 2cm, Yao Neng district separates real image and the virtual image, and namely two pictures do not connect together, and by effective range side is real image, and by the outer side of side is the virtual image.
In step s 102, the maximum angle of camera energy coverage is approximately 110 °, also has the camera of some other angles.In this case, the coverage of camera generally can exceed touch-screen homonymy side, and often because of ambient brightness change or other factors outside touch-screen, and produce breakpoint in the image that camera is photographed.In addition, the more important thing is the virtual image problem that the mirror-reflection due to side reflectorized material produces.And if this situation will be got rid of, the present invention adopts the method for the lower boundary finding camera effective identification range, near touch-screen side, namely find a lower boundary, so just needs described 3rd angle determined in the present invention.
As one of them embodiment, the described step selecting the 3rd angle between described first angle and described second angle, comprises the following steps:
Described first angle and described second angle are sued for peace;
Choose the half of described summed result, as described 3rd angle.
Camera photographs real image and the virtual image of touch objects, and the center line getting both angles, as the lower boundary of the effective identification range of camera, adopt this way not only to calculate easy, and accuracy rate is guaranteed.
As one of them embodiment, the described step selecting the 3rd angle between described first angle and described second angle, comprises the following steps:
Described first angle and described second angle are sued for peace;
Choose the half of described summed result, as the 5th angle;
Described 5th angle is added with predetermined angle or subtracts each other, as described 3rd angle.
Camera photographs real image and the virtual image of touch objects, get the lower boundary of angle as the effective identification range of camera of the approximate centerline of both angles, such as before and after approximate centerline, described 3rd angle can be chosen in the scope of 2 °, adopt this way not only to calculate easy, and accuracy rate is guaranteed.
In step s 103, determine that lower boundary is the scope that described 3rd angle is determined.
Preferably, it is invalid that the touch objects undetermined the 4th angle being greater than described 3rd angle is identified as; Wherein, described 4th angle is the angle between described camera zero degree line and the 3rd line, and described 3rd line is the line between described first camera and described touch objects undetermined.
Can camera zero degree line be that various method can be adopted to rotate zero degree line, and the lower boundary obtained after rotation is at touch-screen side edges with reference to rotating described 3rd angle.Calculate more accurate, technique is more accurate, and the gap of the lower boundary obtained and actual lower boundary (i.e. touch-screen side) is less, thus more accurate to the rejecting of the virtual image.
When determining lower boundary, divided by camera zero degree line as with reference to rotating outside described 3rd angle, can also other line as with reference to rotating other corresponding angle.Except the method adopting above-mentioned rotation, the method for directly setting also can be adopted to determine described lower boundary.When adopting various method determination lower boundary, as long as the result obtained is consistent, then all belong to technical solution of the present invention scope required for protection.
By the actual verification to technical solution of the present invention, the result drawn is the differentiation that the present invention well can solve to the virtual image.Not only successfully remain real image, and outside the lower boundary often determined in the present invention due to the virtual image, therefore success ratio is ideal.
Touch image recognition outside the described lower boundary photographed by camera is invalid.Namely lower boundary is considered to invalid touch to the touching object imaging of camera homonymy side directions, as shown in Figure 7.
Due to touch-screen in actual use, often do not only have a touch point, often there will be the situation of multiple point touching.In this case, the virtual image produced due to mirror-reflection does not only have one yet.And the gray scale of the different virtual image is obviously not quite similar, therefore only adopts the method improving threshold value to distinguish real image and the virtual image, all virtual images can not be ensured to get rid of, or all real images are all retained.And adopt the present invention, by identifying that touch objects identifies calibration position, utilize the relativeness of calibration position and lower boundary to determine lower boundary position.It is invalid to be considered as to the image of camera homonymy side by lower boundary.Divide effective image district and invalid image area by region, identify the boundary of side and base reflectorized material, thus reach the object avoiding touching erroneous judgement.
Compared with general technology, the touch identification method of optical imaging touch screen of the present invention determines the lower boundary position (i.e. the determined scope of described 3rd angle) of the effective identification range of camera by demarcating touch objects, it is invalid the touch objects be positioned at outside described camera zero degree line and the 3rd line to be identified as, and the touching object imaging also namely outside described lower boundary is considered as invalid touch.The virtual image that the mirror-reflection because of touch-screen side reflectorized material causes can be weeded out so exactly, only retain real touch objects real image, thus avoid the generation touching erroneous judgement.
Referring to Fig. 8, is the structural representation of the touch recognition device of optical imaging touch screen of the present invention.The touch recognition device of optical imaging touch screen of the present invention, comprises computing module 201, setting module 202 and identification module 203;
Described computing module 201, for calculating the first angle corresponding to the demarcation touch objects that is positioned on touch-screen and the second angle; Wherein, described first angle is the angle between camera zero degree line and the first line, described second angle is the angle between described camera zero degree line and the second line, described first line is the line between the real image of the described demarcation touch objects that the first camera photographs and described first camera, and described second line is the line between the virtual image of the described demarcation touch objects that described first camera photographs and described first camera;
Described setting module 202, for setting the 3rd angle; Wherein, the numerical value of described 3rd angle is between described first angle and described second angle;
Described identification module 203, for by the scope between described camera zero degree line and the 3rd line, is identified as the effective range of described first camera; Wherein, described 3rd line is through the position of described first camera, and the angle between described camera zero degree line is described 3rd angle, and between described first line and described second line.
Described camera zero degree line is the first camera on touch-screen and the line between second camera.
Preferably, described identification module 203, it is invalid that the touch objects undetermined for the 4th angle being greater than described 3rd angle is identified as; Wherein, described 4th angle is the angle between described camera zero degree line and the 3rd line, and described 3rd line is the line between described first camera and described touch objects undetermined.
As one of them embodiment, described demarcation touch objects is opaque article.
Demarcate touch objects to stop owing to producing light, in the image that camera is photographed, there is breakpoint in white bright wisp.Camera can be regarded as out angle according to the location of pixels being blocked part place, and then obtains its coordinate.
As one of them embodiment, described demarcation touch objects is positioned over distance first side on touch-screen and is less than or equal to the position of preset length; Wherein, described first side is crossing with top margin and minimum apart from described first camera limit, and described top margin is the limit at described first camera and described second camera place.
Such as, described preset length is that 2cm, Yao Neng district separates real image and the virtual image, and namely two pictures do not connect together, and by effective range side is real image, and by the outer side of side is the virtual image.
As one of them embodiment, described setting module is used for described first angle and described second angle to sue for peace;
And choose the half of described summed result, as described 3rd angle.
Camera photographs real image and the virtual image of touch objects, and the center line getting both angles, as the lower boundary of the effective identification range of camera, adopt this way not only to calculate easy, and accuracy rate is guaranteed.
As one of them embodiment, described setting module is used for described first angle and described second angle to sue for peace;
And choose the half of described summed result, as the 5th angle;
And described 5th angle is added with predetermined angle or subtracts each other, as described 3rd angle.
Camera photographs real image and the virtual image of touch objects, get the lower boundary of angle as the effective identification range of camera of the approximate centerline of both angles, such as before and after approximate centerline, described 3rd angle can be chosen in the scope of 2 °, adopt this way not only to calculate easy, and accuracy rate is guaranteed.
Compared with general technology, the touch recognition device of optical imaging touch screen of the present invention determines the lower boundary position (i.e. the determined scope of described 3rd angle) of the effective identification range of camera by demarcating touch objects, it is invalid the touch objects be positioned at outside described camera zero degree line and the 3rd line to be identified as, and the touching object imaging also namely outside described lower boundary is considered as invalid touch.The virtual image that the mirror-reflection because of touch-screen side reflectorized material causes can be weeded out so exactly, only retain real touch objects real image, thus avoid the generation touching erroneous judgement.
The above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1. a touch identification method for optical imaging touch screen, is characterized in that, comprises the following steps:
Calculate the first angle corresponding to demarcation touch objects and the second angle that are positioned on touch-screen; Wherein, described first angle is the angle between camera zero degree line and the first line, described second angle is the angle between described camera zero degree line and the second line, described first line is the line between the real image of the described demarcation touch objects that the first camera photographs and described first camera, and described second line is the line between the virtual image of the described demarcation touch objects that described first camera photographs and described first camera; Described camera zero degree line is the first camera on touch-screen and the line between second camera; The image that the described virtual image produces because of the mirror-reflection of touch-screen side reflectorized material for described demarcation touch objects;
Set the 3rd angle; Wherein, the numerical value of described 3rd angle is between described first angle and described second angle;
By the scope between described camera zero degree line and the 3rd line, be identified as the effective range of described first camera; Wherein, described 3rd line is through the position of described first camera, and the angle between described camera zero degree line is described 3rd angle, and between described first line and described second line.
2. the touch identification method of optical imaging touch screen according to claim 1, is characterized in that, described demarcation touch objects is opaque article.
3. the touch identification method of optical imaging touch screen according to claim 1, is characterized in that, described demarcation touch objects is positioned over distance first side on touch-screen and is less than or equal to the position of preset length; Wherein, described first side is crossing with top margin and minimum apart from described first camera limit, and described top margin is the limit at described first camera and described second camera place.
4. the touch identification method of optical imaging touch screen according to claim 1, is characterized in that, the step of described setting the 3rd angle, comprises the following steps:
Described first angle and described second angle are sued for peace;
Choose the half of described summed result, as described 3rd angle.
5. the touch identification method of optical imaging touch screen according to claim 1, is characterized in that, the step of described setting the 3rd angle, comprises the following steps:
Described first angle and described second angle are sued for peace;
Choose the half of described summed result, as the 5th angle;
Described 5th angle is added with predetermined angle or subtracts each other, as described 3rd angle.
6. a touch recognition device for optical imaging touch screen, is characterized in that, comprises computing module, setting module and identification module;
Described computing module, for calculating the first angle corresponding to the demarcation touch objects that is positioned on touch-screen and the second angle; Wherein, described first angle is the angle between camera zero degree line and the first line, described second angle is the angle between described camera zero degree line and the second line, described first line is the line between the real image of the described demarcation touch objects that the first camera photographs and described first camera, and described second line is the line between the virtual image of the described demarcation touch objects that described first camera photographs and described first camera; Described camera zero degree line is the first camera on touch-screen and the line between second camera; The image that the described virtual image produces because of the mirror-reflection of touch-screen side reflectorized material for described demarcation touch objects;
Described setting module, for setting the 3rd angle; Wherein, the numerical value of described 3rd angle is between described first angle and described second angle;
Described identification module, for by the scope between described camera zero degree line and the 3rd line, is identified as the effective range of described first camera; Wherein, described 3rd line is through the position of described first camera, and the angle between described camera zero degree line is described 3rd angle, and between described first line and described second line.
7. the touch recognition device of optical imaging touch screen according to claim 6, is characterized in that, described demarcation touch objects is opaque article.
8. the touch recognition device of optical imaging touch screen according to claim 6, is characterized in that, described demarcation touch objects is positioned over distance first side on touch-screen and is less than or equal to the position of preset length; Wherein, described first side is crossing with top margin and minimum apart from described first camera limit, and described top margin is the limit at described first camera and described second camera place.
9. the touch recognition device of optical imaging touch screen according to claim 6, is characterized in that, described setting module is used for described first angle and described second angle to sue for peace;
And choose the half of described summed result, as described 3rd angle.
10. the touch recognition device of optical imaging touch screen according to claim 6, is characterized in that, described setting module is used for described first angle and described second angle to sue for peace;
And choose the half of described summed result, as the 5th angle;
And described 5th angle is added with predetermined angle or subtracts each other, as described 3rd angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310179741.6A CN103257750B (en) | 2013-05-15 | 2013-05-15 | The touch identification method of optical imaging touch screen and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310179741.6A CN103257750B (en) | 2013-05-15 | 2013-05-15 | The touch identification method of optical imaging touch screen and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103257750A CN103257750A (en) | 2013-08-21 |
| CN103257750B true CN103257750B (en) | 2016-03-30 |
Family
ID=48961705
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310179741.6A Active CN103257750B (en) | 2013-05-15 | 2013-05-15 | The touch identification method of optical imaging touch screen and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103257750B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108363484B (en) * | 2018-01-24 | 2021-04-09 | 广州杰赛科技股份有限公司 | Control method, device and system of non-touch display screen equipment and computer equipment |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101149656A (en) * | 2007-10-26 | 2008-03-26 | 广东威创视讯科技股份有限公司 | Infra red touch screen and multiple point touching positioning method |
| CN101609381A (en) * | 2008-06-18 | 2009-12-23 | 北京汇冠新技术股份有限公司 | Use the touch-detection sensing device of camera and reflective mirror |
| CN101697105A (en) * | 2009-10-26 | 2010-04-21 | 广东威创视讯科技股份有限公司 | Camera type touch detection positioning method and camera type touch detection system |
| CN101794184A (en) * | 2010-04-07 | 2010-08-04 | 广东威创视讯科技股份有限公司 | Coordinate detection device and locating method thereof |
| CN101887329A (en) * | 2010-07-13 | 2010-11-17 | 世大光电(深圳)有限公司 | Electronic equipment and optical positioning device thereof |
| CN102184054A (en) * | 2011-04-26 | 2011-09-14 | 广东威创视讯科技股份有限公司 | Multi-touch-point recognizing method and device |
-
2013
- 2013-05-15 CN CN201310179741.6A patent/CN103257750B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101149656A (en) * | 2007-10-26 | 2008-03-26 | 广东威创视讯科技股份有限公司 | Infra red touch screen and multiple point touching positioning method |
| CN101609381A (en) * | 2008-06-18 | 2009-12-23 | 北京汇冠新技术股份有限公司 | Use the touch-detection sensing device of camera and reflective mirror |
| CN101697105A (en) * | 2009-10-26 | 2010-04-21 | 广东威创视讯科技股份有限公司 | Camera type touch detection positioning method and camera type touch detection system |
| CN101794184A (en) * | 2010-04-07 | 2010-08-04 | 广东威创视讯科技股份有限公司 | Coordinate detection device and locating method thereof |
| CN101887329A (en) * | 2010-07-13 | 2010-11-17 | 世大光电(深圳)有限公司 | Electronic equipment and optical positioning device thereof |
| CN102184054A (en) * | 2011-04-26 | 2011-09-14 | 广东威创视讯科技股份有限公司 | Multi-touch-point recognizing method and device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103257750A (en) | 2013-08-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9589325B2 (en) | Method for determining display mode of screen, and terminal device | |
| CN104052976B (en) | Projecting method and device | |
| JP7480882B2 (en) | Information processing device, recognition assistance method, and computer program | |
| EP3641298B1 (en) | Method and device for capturing target object and video monitoring device | |
| CN112272292B (en) | Projection correction method, apparatus and storage medium | |
| WO2014106445A1 (en) | Method and apparatus for detecting backlight | |
| WO2022088886A1 (en) | Systems and methods for temperature measurement | |
| US9418446B2 (en) | Method and apparatus for determining a building location based on a building image | |
| CN104376323B (en) | A kind of method and device for determining target range | |
| CN107862713A (en) | Video camera deflection for poll meeting-place detects method for early warning and module in real time | |
| WO2017215246A1 (en) | Input device recognition method and system, and input instruction recognition method and system | |
| CN103472907A (en) | Method and system for determining operation area | |
| CN107797648B (en) | Virtual touch system, image recognition positioning method and computer-readable storage medium | |
| US20200193561A1 (en) | Automatic Detection, Counting, and Measurement of Lumber Boards Using a Handheld Device | |
| CN104065949B (en) | A kind of Television Virtual touch control method and system | |
| CN103257750B (en) | The touch identification method of optical imaging touch screen and device | |
| CN103257754B (en) | The touch identification method of optical imaging touch screen and device | |
| CN111738085B (en) | System construction method and device for realizing automatic driving simultaneous positioning and mapping | |
| CN104063041A (en) | Information processing method and electronic equipment | |
| CN109961637A (en) | Vehicle detection apparatus and system based on more subgraphs fusion and significance analysis | |
| CN108227923A (en) | A kind of virtual touch-control system and method based on body-sensing technology | |
| JP2022070648A (en) | Information processing device and information processing method | |
| JP2019102941A (en) | Image processing apparatus and control method of the same | |
| CN108628487A (en) | A kind of method of determining position information, projection device and computer storage media | |
| CN106097281A (en) | A kind of calibration maps for projecting interactive system and demarcate detection method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |