CN101901087A - Surface positioning device and method based on linear image sensors - Google Patents
Surface positioning device and method based on linear image sensors Download PDFInfo
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Abstract
The invention provides a surface positioning device based on linear image sensors, comprising two linear image sensor modules mounted above a positioning surface as well as a light source module, wherein the linear image sensor modules and the light source module are connected with an image calculation module which is connected with a data transmission module, the data transmission module is connected with a computer, either linear image sensor module comprises a liner image sensor and an optical lens, and an image processing module comprises a singlechip and two analog-digital conversion chips corresponding to the linear image sensor modules and supplies clocks and control signals to the linear image sensor modules. In the invention, the positioning surface is shot by adopting the linear image sensors, and shot linear images are calculated and processed so that touch coordinates are acquired. Compared with the prior art, the invention has small size, low cost and high frame rate.
Description
[technical field]
The present invention relates to a kind of surface alignment touching device of graphic user interface, be specifically related to a kind of based on linear imaging sensor surface positioning device and adopt the surface alignment method of this device.
[background technology]
Whether the technology of present surface alignment generally is based on infrared, and method is the side emission infrared light at locating surface, be blocked by the detection infrared light at opposite side and judge whether locating surface touch event takes place and locate touch coordinate.The shortcoming of this method is that frame per second is lower, and the Installation and Debugging complexity.Because the physical property of infrared transmitting tube, receiving tube determines it can not be operated in very high frequency, has determined infrared surface alignment method frame per second to improve.And infrared receiving tube will receive the infrared light of infrared transmitting tube emission, must all accurately aim at by every pair of infrared tube pipe when mounted, has caused the technology more complicated of Installation and Debugging.
In order to solve the shortcoming of infrared surface alignment technology, a kind of surface alignment technology based on imageing sensor has also appearred on the market.This technology is to take the image of locating surface by imageing sensor, obtains touch information after handling through image calculation and positions.The advantage of this technology is the height of frame per second than infrared surface alignment, but because the general volume ratio of common image sensor is bigger, and frequency of operation height, the travelling speed that needs tens megahertzes, the control timing complexity, need the parameter of setting a lot, caused the complicacy of this technology, need many high-speed peripheral circuit to control and calculate just and can obtain touch coordinate information.So the volume of this device is all bigger, and the cost costliness.
Therefore, provide a kind of frame per second height, debugging is simple, volume is little, cost is low surface positioning device real for necessary.
[summary of the invention]
The object of the present invention is to provide that a kind of volume is little, cost is low, frame per second is high based on the surface positioning device of linear imaging sensor and adopt the surface alignment method of this device.
For realizing the object of the invention, provide following technical scheme:
The invention provides a kind of surface positioning device based on linear imaging sensor, it comprises two linear imaging sensor modules that are installed in the locating surface top, and light source module, this linear imaging sensor module, light source module is connected with the image operation module, the image operation module connects the data transmission module, data transmission module links to each other with computing machine, this linear imaging sensor module comprises linear imaging sensor and optical lens, this image processing module comprises two and the corresponding modulus conversion chip of linear imaging sensor module and a single-chip microcomputer, and this image processing module provides clock and control signal to the linear imaging sensor module.
Described linear imaging sensor module is used to gather the locating surface image, and image data transmission to described image processing module, image processing module calculates image, after obtaining the touch coordinate of locating surface, pass to computer by described data transmission module, computer can correspondingly move according to touch coordinate.
Described linear imaging sensor module is transferred to image processing module to video signal under the control of image processing module.Described image processing module is the core of total system, is made up of two modulus conversion chips and a single-chip microcomputer.The corresponding modulus conversion chip of described each linear imaging sensor module, the video signal of described linear imaging sensor module output is a simulating signal, the function of modulus conversion chip is exactly that the video image of simulating signal is converted to digital signal, and is transferred to single-chip microcomputer and carries out computing.Single-chip microcomputer function in the described image processing module also comprises work clock and the control signal that described linear imaging sensor module is provided.
Described image processing module is mainly realized raw image data transmission, binary image data transmission, coordinate Calculation function.Under the original image transmission mode, described image processing module is transferred to computer to view data by data transmission module reading after every road is converted to the vedio data of digital signal through modulus conversion chip.Under the binary image transmission mode, described image processing module is reading after every road is converted to the vedio data of digital signal through modulus conversion chip, earlier view data is carried out binary conversion treatment, then the view data after the binaryzation is transferred to computer by data transmission module.Under the coordinate Calculation pattern, described image processing module reads every road is converted to digital signal through modulus conversion chip vedio data, view data is transferred to computer to the touch point coordinate data that calculates by described data transmission module through after the computing.
Described optical lens is the visual angle greater than 90 ° small-sized camera lens.This linear imaging sensor is oblique installation in locating surface, make the shooting face of two linear imaging sensors can photograph whole locating surface, the setting angle of this linear imaging sensor is according to the practical situations setting, preferable, this linear imaging sensor oblique 45 degree in locating surface are installed.
Described data transmission module function is the RS232 protocol conversion, promptly the coordinate data of single-chip microcomputer output is converted to the RS232 agreement and sends to computer.Described data transmission module is made up of a slice RS232 chip and peripheral circuit thereof.
Described light source module is made up of several infrared LEDs, and taking for linear imaging sensor provides lighting source.Described light source module is installed in the top of locating surface, launches infrared light downwards.In order to prevent that infrared light from reflecting when the no touch, need all stick dark light absorbent all the other three partss that remove the light source module place of locating surface, place the locating surface top as light source module, then need below reaching about locating surface, stick dark light absorbent respectively.
The present invention also provides a kind of surface alignment method that adopts described surface positioning device based on linear imaging sensor, and it comprises the steps:
The first step, the shooting effective coverage of setting linear imaging sensor makes the shooting effective coverage of linear imaging sensor can just cover whole locating surface.
Further, setting the method for taking the effective coverage is: image processing module is set earlier works in the raw image data transmission mode, with touching four angles that style of writing touches locating surface respectively, the position at the edge of the locating surface that photographs according to linear imaging sensor, by RS232 the shooting effective coverage is set by computer software, single-chip microcomputer is kept at parameter in the nonvolatile memory after receiving shooting effective coverage order being set.
Second step, linear imaging sensor photographs the image of whole locating surface, after analog to digital conversion, data are passed to single-chip microcomputer, shooting effective coverage according to first step setting, single-chip microcomputer abandons the data of taking outside the effective coverage earlier, then the view data of taking in the effective coverage is carried out binary conversion treatment.
Further, the method for binary conversion treatment is: set a threshold value, think that when view data this point is bright spot during more than or equal to threshold value, view data is replaced into FFH, thinks that this point is a dim spot when view data during less than threshold value, and view data is replaced into 00H.
When threshold size is set, image processing module is set earlier works in the binary image transmission mode, under the situation that the no touch incident takes place, adjust the size of threshold value, guarantee to take effective coverage brightness of image value all less than threshold value; Touch locating surface with felt pen respectively at the edge of locating surface then, adjust threshold size, guarantee that felt pen location drawing image brightness value is greater than threshold value.
The described method that threshold size is set is to be provided with by RS232 by computer software, and single-chip microcomputer is kept at parameter in the nonvolatile memory after receiving the threshold size order being set.
In the 3rd step, the data stream of single-chip microcomputer after to binaryzation analyzed, and finds out the speck in the view data, and promptly value be the data of FFH, does not have FFH in the event data stream, thinks the generation of no touch incident; If there is FFH in the data, the coordinate of these data in image promptly thought the felt pen position, and continuous FFH data are thought a speck, i.e. touch point, and the coordinate at speck center is thought the position of felt pen;
In the 4th step, after the 3rd step detected the touch event generation, single-chip microcomputer sent to computer to the coordinate of felt pen, was further calculated by computer, thereby obtained the position of felt pen at locating surface.
The contrast prior art, the present invention has the following advantages:
The present invention adopts linear imaging sensor that locating surface is taken, and the linear image that photographs is carried out computing, thereby obtain touch coordinate.Different with common image sensor, linear imaging sensor is only taken delegation's image, so do not need very high travelling speed can satisfy higher frame per second requirement, generally the travelling speed less than 1MHz can reach above the frame per second more than the 150Hz, when satisfying high frame per second and require, avoided adopting expensive high-speed peripheral circuit to sample and calculate.And the linear imaging sensor volume is little, and is lower to requirements of installation space, for installation provides very big convenience.The core processing part only needs to adopt cheap single-chip microcomputer can satisfy processing requirements, and cost is lower.
[description of drawings]
Fig. 1 is the structural representation of surface positioning device of the present invention;
Fig. 2 is that time line reflection synoptic diagram takes place touch event;
Fig. 3 be touch event when taking place two cameras photograph the original image synoptic diagram of image;
Fig. 4 be touch event when taking place two cameras photograph the binary image synoptic diagram of image;
Fig. 5 is a touch point coordinate Calculation synoptic diagram.
[embodiment]
As shown in Figure 1, be the surface positioning device structural representation that the present invention is based on linear imaging sensor.
Two linear imaging sensors are installed in the upper left corner and the upper right corner of locating surface respectively, the linear imaging sensor 45 ° of installations in 1 oblique lower right in the upper left corner, the linear imaging sensor 45 ° of installations in 2 oblique lower lefts in the upper right corner make the shooting face of two linear imaging sensors can photograph whole locating surface.Locating surface left-hand face, right lateral surface and surface below are sticked dark light absorbent, prevent that infrared light from the light reflection taking place when the no touch incident.
When locating surface no touch incident took place, the infrared light that infrared light supply sends was absorbed by dark light absorbent, and infrared light can not reflex to linear imaging sensor, so the image that linear imaging sensor photographs at this moment is a concealed wire that brightness value is lower.
When locating surface has touch event to take place, the infrared light that infrared light supply sends is launched after shining felt pen, and infrared light reflection is to linear imaging sensor, so, in the image that linear imaging sensor photographs at this moment, the brightness value of felt pen position is far above other position.Touch event time line reflection synoptic diagram takes place in Fig. 2, and Fig. 3 photographs the original image synoptic diagram for linear imaging sensor when sending touch event, and Fig. 4 photographs the binary image synoptic diagram for linear imaging sensor when sending touch event.
Based on above-mentioned principle, it is as described below that touch coordinate calculates embodiment:
The first step, the shooting effective coverage of setting linear imaging sensor makes the shooting effective coverage of linear imaging sensor can just cover whole locating surface.
Further, set when taking the effective coverage, image processing module is set earlier works in the raw image data transmission mode, this moment, computer end can be seen the image frame that linear imaging sensor photographs by software.With touching four angles that style of writing touches locating surface respectively, the felt pen reflects infrared light is in linear imaging sensor, in image, show as speck, at this moment, the speck position of felt pen when the upper right corner and the lower left corner is exactly the edge of the locating surface that photographs of upper left side linear imaging sensor, same, the speck position of felt pen when the upper left corner and the lower right corner is exactly the edge of the locating surface that photographs of upper right side linear imaging sensor, then according to the position at edge, by RS232 the shooting effective coverage is set by computer software, single-chip microcomputer is kept at nonvolatile memory to parameter (as EEPROM after receiving shooting effective coverage order being set, flash etc.) in.When system start-up, single-chip microcomputer reads this parameter automatically and is provided with taking the effective coverage.
Second step, linear imaging sensor photographs the image of whole locating surface, after analog to digital conversion, data are passed to single-chip microcomputer, shooting effective coverage according to first step setting, single-chip microcomputer abandons the data of taking outside the effective coverage earlier, then the view data of taking in the effective coverage is carried out binary conversion treatment.
Further, the method for binary conversion treatment is, sets a threshold value, thinks that this point is bright spot when view data during more than or equal to threshold value, and view data is replaced into FFH, thinks that this point is a dim spot when view data during less than threshold value, and view data is replaced into 00H.After the binary conversion treatment, view data becomes the data stream of having only FFH and two values of 00H.
Further, when threshold size is set, image processing module is set earlier works in the binary image transmission mode, at this moment, computer end can view the black white image that linear imaging sensor photographs by software.Under the situation that the no touch incident takes place, adjust the size of threshold value, guaranteeing to take the effective coverage image is complete black picture, promptly takes effective coverage brightness of image value all less than threshold value.Touch locating surface with felt pen respectively at the edge of locating surface then, adjust threshold size, guarantee that the felt pen position is a white image in the black white image, promptly felt pen location drawing image brightness value is greater than threshold value.After adjustment is finished, guarantee that image is a black when the no touch incident takes place, when having touch event to take place, the felt pen image is a white, and it is black that all the other locations drawing look like.
Further, the method that threshold size is set is to be provided with by RS232 by computer software, and single-chip microcomputer is kept at parameter in the nonvolatile memory after receiving the threshold size order being set.When system start-up, single-chip microcomputer reads this parameter automatically and threshold value is provided with.
In the 3rd step, the data stream of single-chip microcomputer after to binaryzation analyzed, and finds out the speck in the view data, and promptly value be the data of FFH, does not have FFH in the event data stream, thinks the generation of no touch incident; If there is FFH in the data, the coordinate of these data in image promptly thought the felt pen position, and continuous FFH data are thought a speck, i.e. touch point, and the coordinate at speck center is thought the position of felt pen.
In the 4th step, after the 3rd step detected the touch event generation, single-chip microcomputer sent to computer to the coordinate of felt pen, carried out trigonometric function by computer according to the position of felt pen in image and calculated, thereby obtain the position of felt pen at locating surface.Further, the trigonometric function computing method are as follows:
Suppose that the position of touch point in linear imaging sensor 1 is P
1, the position in linear imaging sensor 2 is P
2, linear imaging sensor resolution is R, and the locating surface width is W, and these four parameters are known parameters, wherein P
1, P
2Be to obtain position coordinates in the 3rd step.The touch point at the coordinate of locating surface be (x, y), x is the coordinate of touch point apart from the locating surface left surface, y is the coordinate of touch point apart from the locating surface top.α is the angle of touch point and linear imaging sensor 1 connecting line and the formation of locating surface left surface, and β is the angle of touch point and linear imaging sensor 2 connecting lines and the formation of locating surface right flank, as shown in Figure 5.
According to the principle of imaging, obtain following relation:
α＝90°*(P
1/R)
β＝90°*(1-P
2/R)
According to the tan of trigonometric function, can get:
tan(α)＝x/y
tan(β)＝(W-x)/y
Because α, β and W are known parameters, solve an equation can get coordinate (x, y).
The above is preferred embodiment of the present invention only, and protection scope of the present invention is not limited thereto, and anyly all belongs within the protection domain of the present invention based on the equivalent transformation on the technical solution of the present invention.
Claims (10)
1. surface positioning device based on linear imaging sensor, it is characterized in that, it comprises two linear imaging sensor modules that are installed in the locating surface top, and light source module, this linear imaging sensor module, light source module is connected with the image operation module, the image operation module connects the data transmission module, data transmission module links to each other with computing machine, this linear imaging sensor module comprises linear imaging sensor and optical lens, this image processing module comprises two and the corresponding modulus conversion chip of linear imaging sensor module and a single-chip microcomputer, and this image processing module provides clock and control signal to the linear imaging sensor module.
2. the surface positioning device based on linear imaging sensor as claimed in claim 1 is characterized in that, the optical lens of this linear imaging sensor module is the small-sized camera lens of visual angle greater than 90 degree.
3. the surface positioning device based on linear imaging sensor as claimed in claim 1 is characterized in that this data transmission module comprises RS232 chip and peripheral circuit thereof.
4. the surface positioning device based on linear imaging sensor as claimed in claim 1 is characterized in that, all sticks dark light absorbent all the other three partss that remove the light source module place of locating surface.
5. the surface positioning device based on linear imaging sensor as claimed in claim 1 is characterized in that, this linear imaging sensor oblique 45 degree in locating surface are installed.
6. the surface alignment method of any described surface positioning device based on linear imaging sensor of employing such as claim 1～5 is characterized in that it comprises the steps:
The first step, the shooting effective coverage of setting linear imaging sensor makes the shooting effective coverage of linear imaging sensor can just cover whole locating surface;
Second step, linear imaging sensor photographs the image of whole locating surface, after analog to digital conversion, data are passed to single-chip microcomputer, shooting effective coverage according to first step setting, single-chip microcomputer abandons the data of taking outside the effective coverage earlier, then the view data of taking in the effective coverage is carried out binary conversion treatment;
In the 3rd step, the data stream of single-chip microcomputer after to binaryzation analyzed, and finds out the speck in the view data, and promptly value be the data of FFH, does not have FFH in the event data stream, thinks the generation of no touch incident; If there is FFH in the data, the coordinate of these data in image promptly thought the felt pen position, and continuous FFH data are thought a speck, i.e. touch point, and the coordinate at speck center is thought the position of felt pen;
In the 4th step, after the 3rd step detected the touch event generation, single-chip microcomputer sent to computer to the coordinate of felt pen, was further calculated by computer, thereby obtained the position of felt pen at locating surface.
7. surface alignment method as claimed in claim 6, it is characterized in that, described first step is set the method for taking the effective coverage: image processing module is set earlier works in the raw image data transmission mode, with touching four angles that style of writing touches locating surface respectively, the position at the edge of the locating surface that photographs according to linear imaging sensor, by RS232 the shooting effective coverage is set by computer software, single-chip microcomputer is kept at parameter in the nonvolatile memory after receiving shooting effective coverage order being set.
8. surface alignment method as claimed in claim 6, it is characterized in that, the method of binary conversion treatment is in described second step: set a threshold value, when view data thinks that this point is bright spot during more than or equal to threshold value, view data is replaced into FFH, think that this point is a dim spot when view data during less than threshold value, view data is replaced into 00H.
9. surface alignment method as claimed in claim 8, it is characterized in that, when in described second step threshold size being set, image processing module is set earlier works in the binary image transmission mode, under the situation that the no touch incident takes place, adjust the size of threshold value, guarantee to take effective coverage brightness of image value all less than threshold value; Touch locating surface with felt pen respectively at the edge of locating surface then, adjust threshold size, guarantee that felt pen location drawing image brightness value is greater than threshold value.
10. surface alignment method as claimed in claim 9 is characterized in that, the described method that threshold size is set is to be provided with by RS232 by computer software, and single-chip microcomputer is kept at parameter in the nonvolatile memory after receiving the threshold size order being set.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102508582A (en) * | 2011-11-30 | 2012-06-20 | 无锡海森诺科技有限公司 | Optical touch calibration automatic adjusting method |
| CN102880354A (en) * | 2011-07-15 | 2013-01-16 | 纬创资通股份有限公司 | Optical image type touch device and touch image processing method |
| CN102968218A (en) * | 2011-08-30 | 2013-03-13 | 纬创资通股份有限公司 | Optical image type touch device and touch image processing method |
| CN103034375A (en) * | 2012-10-19 | 2013-04-10 | 无锡海森诺科技有限公司 | Selecting method for optimal initial row of optical touch image |
| CN104111756A (en) * | 2013-04-17 | 2014-10-22 | 广州视睿电子科技有限公司 | Method and system for improving image frame rate and optical imaging touch screen system |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07200130A (en) * | 1993-12-29 | 1995-08-04 | Wacom Co Ltd | Optical digitizer and its display device |
| CN1932726A (en) * | 2006-10-13 | 2007-03-21 | 广东威创日新电子有限公司 | Digital image sensor locator based on CMOS and locating method |
| US20090044989A1 (en) * | 2007-08-13 | 2009-02-19 | Canon Kabushiki Kaisha | Coordinate input apparatus and method |
-
2010
- 2010-07-27 CN CN 201010238673 patent/CN101901087B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07200130A (en) * | 1993-12-29 | 1995-08-04 | Wacom Co Ltd | Optical digitizer and its display device |
| CN1932726A (en) * | 2006-10-13 | 2007-03-21 | 广东威创日新电子有限公司 | Digital image sensor locator based on CMOS and locating method |
| US20090044989A1 (en) * | 2007-08-13 | 2009-02-19 | Canon Kabushiki Kaisha | Coordinate input apparatus and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102880354A (en) * | 2011-07-15 | 2013-01-16 | 纬创资通股份有限公司 | Optical image type touch device and touch image processing method |
| CN102968218A (en) * | 2011-08-30 | 2013-03-13 | 纬创资通股份有限公司 | Optical image type touch device and touch image processing method |
| CN102968218B (en) * | 2011-08-30 | 2016-04-27 | 纬创资通股份有限公司 | Optical image type touch device and touch image processing method |
| CN102508582B (en) * | 2011-11-30 | 2015-01-07 | 无锡海森诺科技有限公司 | Optical touch calibration automatic adjusting method |
| CN102508582A (en) * | 2011-11-30 | 2012-06-20 | 无锡海森诺科技有限公司 | Optical touch calibration automatic adjusting method |
| CN103034375B (en) * | 2012-10-19 | 2016-08-10 | 无锡海森诺科技有限公司 | The choosing method of optimal initial row of optical touch image |
| CN103034375A (en) * | 2012-10-19 | 2013-04-10 | 无锡海森诺科技有限公司 | Selecting method for optimal initial row of optical touch image |
| CN104111756A (en) * | 2013-04-17 | 2014-10-22 | 广州视睿电子科技有限公司 | Method and system for improving image frame rate and optical imaging touch screen system |
| CN104111756B (en) * | 2013-04-17 | 2017-06-16 | 广州视睿电子科技有限公司 | Method and system for improving image frame rate and optical imaging touch screen system |
| CN105278760A (en) * | 2014-07-15 | 2016-01-27 | 广达电脑股份有限公司 | Optical Touch System |
| CN105278760B (en) * | 2014-07-15 | 2019-02-15 | 广达电脑股份有限公司 | Optical touch system |
| CN104883819A (en) * | 2015-04-29 | 2015-09-02 | 广东威创视讯科技股份有限公司 | PCB silkscreen processing method and system |
| CN104883819B (en) * | 2015-04-29 | 2018-08-07 | 广东威创视讯科技股份有限公司 | PCB silk-screen processing method and system |
| CN109059760A (en) * | 2018-07-31 | 2018-12-21 | 易视智瞳科技（深圳）有限公司 | A kind of tool alignment method and its device |
| CN112966556A (en) * | 2021-02-02 | 2021-06-15 | 豪威芯仑传感器(上海)有限公司 | Moving object detection method and system |
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