CN102520869A - Automatic parameter adjusting method for imaging touch screen of camera - Google Patents
Automatic parameter adjusting method for imaging touch screen of camera Download PDFInfo
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- CN102520869A CN102520869A CN2011104372781A CN201110437278A CN102520869A CN 102520869 A CN102520869 A CN 102520869A CN 2011104372781 A CN2011104372781 A CN 2011104372781A CN 201110437278 A CN201110437278 A CN 201110437278A CN 102520869 A CN102520869 A CN 102520869A
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Abstract
The invention belongs to the field of touch screens, in particular to an automatic parameter adjusting method for an imaging touch screen of a camera, which includes the following steps that a data storage in the touch screen stores a touch screen parameter threshold, the touch screen is started and initialized, the touch screen parameter threshold in the data storage is read to a computer internal memory of the touch screen, the touch screen detects touch points and obtains images and pixel values of the touch points, the pixel values of the touch point images are compared with the touch screen parameter to obtain effective touch point pixel point and calculate moving speed of the touch points, the touch screen threshold parameter in the computer internal memory is adjusted according to the number of effective touch point pixel points and the moving speed of the touch points, and the adjusted touch screen threshold parameter is applied to detect and calculate new touch points in the touch screen. The automatic parameter adjusting method is capable of automatically adjusting camera gain and the brightness threshold of different areas of the touch screen, improves application effect of the touch screen and shortens manual equipment debugging time.
Description
Technical field
The invention belongs to the touch-screen field, be specifically related to a kind of camera imaging touch-screen parameter automatic adjusting method.
Background technology
In camera imaging touch-screen; Need to set camera gain that is used for photographic images and the parameters such as luminance threshold that are used to screen the touch point image; Generally be that manufacturer finds the parameter value that meets application demand to be solidificated in the equipment through experiment; Perhaps hand debugging meets the parameter value of application demand and is solidificated in the equipment in the project installation personnel Installation and Debugging process at the scene; Because the uncertainty of camera manufacturing variation and applied environment, the equipment that adopts same set of parameter value be difficult to let to be installed on various scenes reaches best effect, and field erected engineering staff debugs the touch-screen parameter and also need expend long man-hour simultaneously.And owing to be provided with convex lens in the camera, convex lens make light draw close toward the center, if therefore adopt a global gain and a fixing luminance threshold; The brightness of image that the luminophor of same brightness obtains in each zone of camera is different, generally is to successively decrease around the middle mind-set, and its characteristics that show are; Through after the filtration of luminance threshold; The central area of touch-screen and peripheral regions contrast, the pixel that surpasses luminance threshold that the central area obtains is compared the many of peripheral regions, and the pixel above luminance threshold is continuous relatively in the central area; Distribution possibly appear being interrupted in the pixel that peripheral regions surpasses luminance threshold; The continuous relatively image easy for calculation that surpasses luminance threshold goes out its barycentric coordinates point, and the discontinuous pixel that surpasses luminance threshold can cause calculating a plurality of barycentric coordinates points, produces error coordinates; Cause the touch-screen on the touch-screen is judged by accident, influenced the effect of touch-screen and user's experience.
Summary of the invention
The technical matters that the present invention solves is the deficiency that overcomes prior art; A kind of on-line automatic adjustment camera gain and touch-screen zones of different luminance threshold are provided; Improve the effect of touch-screen, and shorten the camera imaging touch-screen parameter automatic adjusting method of manual debugging equipment time.
For solving the problems of the technologies described above, technical scheme of the present invention is following:
A kind of camera imaging touch-screen parameter automatic adjusting method comprises the steps:
Data-carrier store in the touch-screen stores the touch-screen parameter threshold;
Open touch-screen and initialization touch-screen, the touch-screen parameter threshold in the reading of data storer is in the calculating internal memory of touch-screen;
Touch-screen detects the touch point, obtains the image and the pixel value thereof of said touch point;
Each pixel value of said touch point image and touch-screen parameter threshold compared obtain effective touch point pixel, and calculate said touch point translational speed;
With reference to effectively the touch-screen threshold parameter in the internal memory is calculated in touch point pixel number, the adjustment of touch point translational speed;
Using adjusted touch-screen threshold parameter detects and calculates touch point new in the touch-screen.
In the such scheme, said touch-screen parameter threshold comprises touch-screen luminance threshold, touch point translational speed threshold value, pixel number threshold value.
In the such scheme, said method also comprises said touch-screen zoning territory, corresponding luminance threshold in a zone of touch-screen;
When said touch point pixel brightness value during greater than the corresponding luminance threshold in its region, said touch point pixel is an effective touch point pixel.
In the such scheme, the concrete steps that the touch-screen threshold parameter in the internal memory is calculated in the effective touch point of said reference pixel number, the adjustment of touch point translational speed are following:
When said touch point translational speed during less than touch point translational speed threshold value; Judge that whether effective touch point pixel number is less than pixel number threshold value; If then reduce the corresponding luminance threshold in pixel region, said effective touch point, otherwise improve the corresponding luminance threshold in pixel region, said effective touch point.
In the such scheme, said touch-screen parameter threshold also comprises the camera global gain parameter.
In the such scheme, said method also comprises also to be adjusted the camera global gain parameter, its specifically:
The central area scope of touch-screen is set in advance;
Calculate the barycentric coordinates of said touch point according to said effective touch point pixel;
When said touch point barycentric coordinates are positioned at the central area of touch-screen, judge that effective touch point pixel number whether less than pixel number threshold value, if then increase the camera global gain parameter, otherwise reduces the camera global gain parameter.
In the such scheme; Also comprise pixel number max-thresholds and minimum threshold in the said touch-screen parameter threshold; When said effective touch point pixel number during, then do not carry out the adjustment of the corresponding luminance threshold in pixel region, effective touch point greater than pixel number max-thresholds or less than pixel number minimum threshold.
In the such scheme; Also comprise pixel number max-thresholds and minimum threshold in the said touch-screen parameter threshold; When said effective touch point pixel number during, then do not carry out the adjustment of camera global gain parameter greater than pixel number max-thresholds or less than pixel number minimum threshold.
Compared with prior art, the beneficial effect of technical scheme of the present invention is:
The present invention is provided with the different brightness threshold value to the touch-screen zones of different; Through the automatic adjustment of luminance threshold and the automatic adjustment of camera global gain parameter are improved touch-screen veracity of parameters and reliability; The pixel of avoiding the touch-screen peripheral regions to occur is interrupted distribution situation, improves the accuracy rate of touch point coordinate Calculation, effectively improves the effect of touch-screen; And can save on-the-spot manual debugging when touch-screen is installed, shorten debug time.
Description of drawings
Fig. 1 is a process flow diagram of the present invention;
Fig. 2 is corresponding each the regional distribution plan of touch-screen of touch-screen luminance threshold among the present invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment technical scheme of the present invention is done further explanation.
Be illustrated in figure 1 as the process flow diagram of a kind of camera imaging touch-screen parameter automatic adjusting method among the present invention, said method comprises the steps:
(S1) data-carrier store in the touch-screen stores the touch-screen parameter threshold; The touch-screen parameter threshold comprises: the touch-screen luminance threshold; Touch point translational speed threshold value; Pixel number threshold value, pixel number max-thresholds and pixel number minimum threshold; The camera global gain parameter, wherein, pixel number max-thresholds>pixel number threshold value>pixel number minimum threshold; Simultaneously; In advance with touch-screen zoning territory and set the central area scope of touch-screen; Corresponding luminance threshold in a zone of touch-screen; Corresponding each the regional distribution plan of touch-screen of touch-screen luminance threshold is as shown in Figure 2, and it satisfies the characteristic of successively decreasing to peripheral regions from the touch screen center zone.
(S2) open touch-screen and initialization touch-screen, the touch-screen parameter threshold in the reading of data storer is in the calculating internal memory of touch-screen; Camera global gain wherein is used for the camera photographic images, and the touch-screen luminance threshold is used for the effective touch point pixel in each zone of screening touch-screen after camera photographs the touch point image.
(S3) touch-screen detects the touch point, obtains the image and the pixel value thereof of said touch point; When the user clicks touch-screen, will produce the touch point image, obtain each pixel value on this touch point image and this touch point image through camera.
(S4) each pixel value on the image of touch point and touch-screen parameter threshold are compared obtain effective touch point pixel, and calculate the barycentric coordinates of said touch point translational speed and touch point; When the pixel brightness value on the image of touch point during greater than the corresponding luminance threshold in its region, the pixel on this touch point image is an effective touch point pixel.Effective pixel points number and the touch point translational speed that calculate to constitute the touch point is to be to carry out the adjustment of parameter threshold when resting on the touch area in the touch point in order to ensure the touch-screen parameter threshold, improves the accuracy of parameter adjustment.
(S5) calculate the touch-screen threshold parameter in the internal memory with reference to the barycentric coordinates adjustment of effective touch point pixel number, touch point translational speed, touch point; It specifically comprises the steps:
(S51) the touch-screen luminance threshold is adjusted, its specifically:
(S511) when touch point translational speed during, whether judge effective touch point pixel number,, otherwise get into step (S513) if get into step (S512) less than pixel number threshold value less than touch point translational speed threshold value;
(S512) judge that whether effective touch point pixel number is less than pixel number minimum threshold; If then do not carry out the adjustment of the corresponding luminance threshold in pixel region, effective touch point, otherwise reduce the corresponding luminance threshold in this pixel region, effective touch point;
(S513) judge that whether effective touch point pixel number is less than pixel number max-thresholds; If then do not carry out the adjustment of the corresponding luminance threshold in pixel region, effective touch point, otherwise improve the corresponding luminance threshold in pixel region, effective touch point.
(S52) the camera global gain parameter is adjusted, its specifically:
(S521) when said touch point barycentric coordinates are positioned at the central area of touch-screen, whether judge effective touch point pixel number less than pixel number threshold value, if get into step (S522), otherwise get into step (S523);
(S512) whether judge effective touch point pixel number less than pixel number minimum threshold,, otherwise increase the camera global gain parameter if then do not carry out the adjustment of camera global gain parameter;
(S513) whether judge effective touch point pixel number less than pixel number max-thresholds,, otherwise reduce the camera global gain parameter if then do not carry out the adjustment of camera global gain parameter.
(S6) using adjusted touch-screen threshold parameter detects and calculates touch point new in the touch-screen.
Claims (8)
1. a camera imaging touch-screen parameter automatic adjusting method is characterized in that, comprises the steps:
Data-carrier store in the touch-screen stores the touch-screen parameter threshold;
Open touch-screen and initialization touch-screen, the touch-screen parameter threshold in the reading of data storer is in the calculating internal memory of touch-screen;
Touch-screen detects the touch point, obtains the image and the pixel value thereof of said touch point;
Each pixel value of said touch point image and touch-screen parameter threshold compared obtain effective touch point pixel, and calculate said touch point translational speed;
With reference to effectively the touch-screen threshold parameter in the internal memory is calculated in touch point pixel number, the adjustment of touch point translational speed;
Using adjusted touch-screen threshold parameter detects and calculates touch point new in the touch-screen.
2. camera imaging touch-screen parameter automatic adjusting method according to claim 1 is characterized in that said touch-screen parameter threshold comprises touch-screen luminance threshold, touch point translational speed threshold value, pixel number threshold value.
3. camera imaging touch-screen parameter automatic adjusting method according to claim 2 is characterized in that, said method also comprises said touch-screen zoning territory, corresponding luminance threshold in a zone of touch-screen;
When said touch point pixel brightness value during greater than the corresponding luminance threshold in its region, said touch point pixel is an effective touch point pixel.
4. camera imaging touch-screen parameter automatic adjusting method according to claim 3 is characterized in that the concrete steps that the touch-screen threshold parameter in the internal memory is calculated in the effective touch point of said reference pixel number, the adjustment of touch point translational speed are following:
When said touch point translational speed during less than touch point translational speed threshold value; Judge that whether effective touch point pixel number is less than pixel number threshold value; If then reduce the corresponding luminance threshold in pixel region, said effective touch point, otherwise improve the corresponding luminance threshold in pixel region, said effective touch point.
5. camera imaging touch-screen parameter automatic adjusting method according to claim 4 is characterized in that said touch-screen parameter threshold also comprises the camera global gain parameter.
6. camera according to claim 5 imaging touch-screen parameter automatic adjusting method is characterized in that said method also comprises also to be adjusted the camera global gain parameter, its specifically:
The central area scope of touch-screen is set in advance;
Calculate the barycentric coordinates of said touch point according to said effective touch point pixel;
When said touch point barycentric coordinates are positioned at the central area of touch-screen, judge that effective touch point pixel number whether less than pixel number threshold value, if then increase the camera global gain parameter, otherwise reduces the camera global gain parameter.
7. camera imaging touch-screen parameter automatic adjusting method according to claim 4; It is characterized in that; Also comprise pixel number max-thresholds and minimum threshold in the said touch-screen parameter threshold; When said effective touch point pixel number during, then do not carry out the adjustment of the corresponding luminance threshold in pixel region, effective touch point greater than pixel number max-thresholds or less than pixel number minimum threshold.
8. camera imaging touch-screen parameter automatic adjusting method according to claim 6; It is characterized in that; Also comprise pixel number max-thresholds and minimum threshold in the said touch-screen parameter threshold; When said effective touch point pixel number during, then do not carry out the adjustment of camera global gain parameter greater than pixel number max-thresholds or less than pixel number minimum threshold.
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| CN103632649A (en) * | 2012-08-21 | 2014-03-12 | 宏碁股份有限公司 | A method for adjusting backlight brightness and an electronic apparatus |
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| CN102043541A (en) * | 2009-10-14 | 2011-05-04 | 谭登峰 | General optical touch screen |
| CN102265252A (en) * | 2011-06-24 | 2011-11-30 | 华为终端有限公司 | A method and a device for adjusting a sensing threshold value of an infrared proximity sensor |
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| US20100164479A1 (en) * | 2008-12-29 | 2010-07-01 | Motorola, Inc. | Portable Electronic Device Having Self-Calibrating Proximity Sensors |
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| CN103632649A (en) * | 2012-08-21 | 2014-03-12 | 宏碁股份有限公司 | A method for adjusting backlight brightness and an electronic apparatus |
| CN103632649B (en) * | 2012-08-21 | 2016-03-23 | 宏碁股份有限公司 | The method of adjustment of backlight illumination and electronic installation |
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Address after: Kezhu road high tech Industrial Development Zone, Guangzhou city of Guangdong Province, No. 233 510670 Patentee after: VTRON GROUP Co.,Ltd. Address before: 510663 No. 6, color road, hi tech Industrial Development Zone, Guangdong, Guangzhou, China Patentee before: VTRON TECHNOLOGIES Ltd. |
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Effective date of registration: 20201118 Address after: 215500 No.13, Caotang Road, Changshu, Suzhou, Jiangsu Province Patentee after: Changshu intellectual property operation center Co.,Ltd. Address before: Unit 2414-2416, main building, no.371, Wushan Road, Tianhe District, Guangzhou City, Guangdong Province Patentee before: GUANGDONG GAOHANG INTELLECTUAL PROPERTY OPERATION Co.,Ltd. Effective date of registration: 20201118 Address after: Unit 2414-2416, main building, no.371, Wushan Road, Tianhe District, Guangzhou City, Guangdong Province Patentee after: GUANGDONG GAOHANG INTELLECTUAL PROPERTY OPERATION Co.,Ltd. Address before: Kezhu road high tech Industrial Development Zone, Guangzhou city of Guangdong Province, No. 233 510670 Patentee before: VTRON GROUP Co.,Ltd. |
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Address after: 215500 5th floor, building 4, 68 Lianfeng Road, Changfu street, Changshu City, Suzhou City, Jiangsu Province Patentee after: Changshu intellectual property operation center Co.,Ltd. Address before: No.13 caodang Road, Changshu City, Suzhou City, Jiangsu Province Patentee before: Changshu intellectual property operation center Co.,Ltd. |