CN101727244B - Correcting device and correcting method - Google Patents
Correcting device and correcting method Download PDFInfo
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- CN101727244B CN101727244B CN2008101746235A CN200810174623A CN101727244B CN 101727244 B CN101727244 B CN 101727244B CN 2008101746235 A CN2008101746235 A CN 2008101746235A CN 200810174623 A CN200810174623 A CN 200810174623A CN 101727244 B CN101727244 B CN 101727244B
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Abstract
The invention provides a correcting device applied to an image processing device. The correcting device comprises a first operation module, a second operation module and a regulation module. The first operation module determines a third indication point and a fourth indication point according to a first indication point, a second indication point and a specific point, and determines a preset position of a correcting point or a photo-sensitive element through a first straight line between the first indication point and the third indication point and a second straight line between the second indication point and the fourth indication point. The second operation module forms a plurality of reference lines according to a plurality of reference points and the correcting point and forms a plurality of reference angles according to the plurality of reference lines and a datum line, generates a plurality of reference point coordinates corresponding to the plurality of reference points in an observed image respectively, and generates a correcting function according to the plurality of reference point coordinates and the plurality of reference angles.
Description
Technical field
The present invention is relevant with Flame Image Process, and particularly relevant for a kind of means for correcting and method of the photo-sensitive cell in order to the correcting image treating apparatus.
Background technology
In recent years, along with image processing techniques evolution constantly, the various input methods that can offer convenience for the user, for example Touch Screen, acoustic control input and gesture acquisition inputs etc. all receive the attention in market gradually and begin to develop by leaps and bounds.
With regard to general common on the market optical touch control type screen, this kind screen includes plural photo-sensitive cell usually, in order to detect the state of the touch points on the screen.For example; When the user forms luminous point with ray cast to screen; This optical touch control type screen can be through the photo-sensitive cell acquisition image corresponding to this screen, and utilizes image processing techniques to judge that this luminous point is positioned at coordinate on the screen to reach the purpose of input.
In addition, the photo-sensitive cell acquisition also capable of using of this optical touch control type screen reaches the effect of gesture acquisition input again corresponding to the image of user's gesture through image processing techniques and gesture identification technique.On the other hand, above-mentioned photo-sensitive cell also can carry out the acquisition work of image through wide-angle lens or fish eye lens, so that photo-sensitive cell can be contained whole screen in quite short distance.
Yet, if the position of the photo-sensitive cell of optical touch control type screen or angle deviation to some extent will have considerable influence for the degree of accuracy of its detected touch points state.Serious, these deviations even possibly cause the situation of the touch points interpretation mistake that the user imports to take place.
Therefore, main category of the present invention is to provide a kind of means for correcting and method that can be applicable to image processing apparatus, to address the above problem.
Summary of the invention
A category of the present invention is to provide a kind of means for correcting and method that can be applicable to image processing apparatus.Through the assistance of this means for correcting and method, the position of the photo-sensitive cell of image processing apparatus and angle can be adjusted to correct position, to promote the degree of accuracy that image processing apparatus detects touch points state or identification gesture.
A specific embodiment according to the present invention is a kind of means for correcting.This means for correcting can be in order to the position and the angle of the photo-sensitive cell of correcting image treating apparatus (for example optical touch control type screen).This image processing apparatus comprises at least one photo-sensitive cell and panel.Show first indication point, second indication point and a plurality of RP of known coordinate on the panel, this at least one photo-sensitive cell is to be positioned on the other predeterminated position of the specified point of panel outer rim.
In this embodiment, this means for correcting comprises first computing module and second computing module.At first; First computing module determines the 3rd indication point and the 4th indication point according to first indication point, second indication point and specified point, and reaches second straight line decision check point (i.e. the predeterminated position of this at least one photo-sensitive cell) through second indication point and the 4th indication point according to first straight line through first indication point and the 3rd indication point.Then; Second computing module forms many reference lines and forms a plurality of with reference to angle according to many reference lines and datum line according to a plurality of RPs and check point (predeterminated position); Produce the corresponding a plurality of RPs of difference in a plurality of RP coordinates of the observation image of at least one photo-sensitive cell, and according to a plurality of RP coordinates and a plurality of with reference to angle generation correction function.
Because check point (predeterminated position) is produced by first computing module and second computing module respectively with correction function; Therefore can adjust the position of this this at least one photo-sensitive cell or according to the angle of the angle between correction function this photo-sensitive cell of adjustment and datum line, to reach the effect of this photo-sensitive cell of correction according to check point.
At last, this means for correcting can use the front contact on the triangle location decision screen.
Another specific embodiment according to the present invention is a kind of bearing calibration.This bearing calibration can be applicable to comprise the image processing apparatus of panel and at least one photo-sensitive cell.In this embodiment, show first indication point, second indication point and a plurality of RP of known coordinate on the panel, this at least one photo-sensitive cell is to be positioned on the other predeterminated position of the specified point of panel outer rim.
This bearing calibration is broadly divided into two stages.In the phase one, this bearing calibration will determine in order to the check point of the position of adjusting this at least one photo-sensitive cell (predeterminated position).At first, this bearing calibration is positioned at the 3rd indication point and the 4th indication point on the panel according to the specified point decision of first indication point, second indication point and panel outer rim.Then, this bearing calibration reaches second straight line decision check point (predeterminated position) through second indication point and the 4th indication point according to first straight line through first indication point and the 3rd indication point.
In subordinate phase, this bearing calibration will further produce correction function between coordinate and angle to adjust the angle of this at least one photo-sensitive cell.At first, this bearing calibration produces through check point (predeterminated position) and is parallel to the datum line of panel outer rim.Then, this bearing calibration forms many reference lines according to a plurality of RPs and check point, and forms a plurality of with reference to angle according to many reference lines and datum line.Afterwards, this bearing calibration produces the corresponding a plurality of RPs of difference in a plurality of RP coordinates of the observation image of at least one photo-sensitive cell, again according to a plurality of RP coordinates and a plurality of with reference to angle generation correction function.
Compared to prior art; According to means for correcting of the present invention and method can be effectively according to several indication points of known coordinate on the panel of image processing apparatus; Carry out the correction of position and angle for the photo-sensitive cell of image processing apparatus, avoid causing the wrongheaded situation of touch points to take place owing to the position and the angle generation deviation of photo-sensitive cell.By this, can significantly promote the degree of accuracy that image processing apparatus detects touch points state or identification gesture according to means for correcting of the present invention and method.
Can graphicly further be understood through following detailed Description Of The Invention and appended about advantage of the present invention and spirit.
Description of drawings
Fig. 1 is the synoptic diagram that illustrates the optical touch control type screen.
Fig. 2 (A) is the functional block diagram that illustrates according to the means for correcting of first specific embodiment of the present invention.
Fig. 2 (B) is the detailed functions calcspar that illustrates first computing module among Fig. 2 (A).
Fig. 3 (A) illustrates the example that first computing module determines the 3rd indication point and the 4th indication point.
Fig. 3 (B) be illustrate that second photo-sensitive cell sensed first observe image synoptic diagram.
Fig. 3 (C) be illustrate that second photo-sensitive cell sensed second observe image synoptic diagram.
Fig. 4 (A) illustrates the example that first computing module determines second predeterminated position.
Fig. 4 (B) be illustrate that second photo-sensitive cell sensed the 3rd observe image synoptic diagram.
Fig. 4 (C) be illustrate that second photo-sensitive cell sensed the 4th observe image synoptic diagram.
Fig. 5 (A) illustrates the example that second computing module produces correction function.
Fig. 5 (B) be illustrate that second photosensitive elements sense arrives the 5th observe image synoptic diagram.
Fig. 6 is the angularity correction function # (Ix) that illustrates corresponding to the x coordinate figure of RP.
Fig. 7 is the process flow diagram that illustrates according to the bearing calibration of second specific embodiment of the present invention.
Fig. 8 is the detail flowchart that illustrates the step S10 among Fig. 7.
[main element label declaration]
S10～S103: steps flow chart
1: optical touch control type screen 12: panel
16: the second photo-sensitive cells of 14: the first photo-sensitive cells
18: luminescence unit 2: means for correcting
24: the second computing modules of 22: the first computing modules
222: the first processing unit D: first predeterminated position
226: the three processing units of 224: the second processing units
T1: the first specified point T2: second specified point
P1: the first indication point P2: second indication point
P3: the 3rd indication point P4: the 4th indication point
R1～R8: RP L1: first boost line
L2: the second boost line P1 ': first auxiliary point
P1 ＂: the second auxiliary point P2 ': the 3rd auxiliary point
P2 ＂: the 4th auxiliary point I
P1 ': the observation point of corresponding P1 '
I
P1 ＂: the observation point I of corresponding P1 ＂
P1: the observation point of corresponding P1
I
P2 ': the observation point I of corresponding P2 '
P2 ＂: the observation point of corresponding P2 ＂
I
P2: the observation point L1 ' of corresponding P2: first straight line
L2 ': the second straight line I
P3: the observation point of corresponding P3
I
P4: the observation point F of corresponding P4: second predeterminated position
L0: datum line L
R1～L
R8: reference line
θ
1～θ
8: with reference to the x coordinate figure of angle x1～x8:R1～R8
θ (Ix): the y coordinate figure of angularity correction function y1～y8:R1～R8
A:b: first distance is than c:d: the second distance ratio
I
R1～I
R8: the observation point of corresponding R1～R8
I1～I5: observe image
Embodiment
The present invention provides a kind of means for correcting and method that is applied to image processing apparatus.Through the assistance of this means for correcting and method, the position of the photo-sensitive cell of image processing apparatus and angle can be adjusted to correct position, to promote the degree of accuracy that image processing apparatus detects touch points state or identification gesture.Below specific embodiment of the present invention will be detailed, the simplicity of using abundant explanation characteristic of the present invention, spirit, advantage and implementing.
First specific embodiment according to the present invention is a kind of means for correcting.The photo-sensitive cell that this means for correcting can be directed against image processing apparatus (for example optical touch control type screen) carries out the correction of position and angle.See also Fig. 1, Fig. 1 is the synoptic diagram that illustrates the optical touch control type screen.As shown in Figure 1, optical touch control type screen 1 comprises panel 12, first photo-sensitive cell 14, second photo-sensitive cell 16 and a plurality of luminescence unit 18 (for example light emitting diode).On panel 12, show eight RP R1～R8 of the first indication point P1, the second indication point P2 and the known coordinate of known coordinate.In fact, the first indication point P1, the second indication point P2 and eight RP R1～R8 be with by the user with the touch points of finger or arbitrary objects (for example pointer) contact surface plate 12 to carry out correction program.
In this embodiment, first photo-sensitive cell 14 is on the first predeterminated position D by the top left corner apex T1 (first specified point) that is positioned at panel 12 outer rims; Second photo-sensitive cell 16 is to be positioned on the second other predeterminated position F of summit, the upper right corner T2 (second specified point) of panel 12 outer rims.The function of first photo-sensitive cell 14 and second photo-sensitive cell 16 is that the variation (for example being blocked by finger or pointer) of the light that these luminescence units 18 of sensing are sent is to produce the observation image.
See also Fig. 2 (A), Fig. 2 (A) is the functional block diagram that illustrates this means for correcting.Shown in Fig. 2 (A), means for correcting 2 comprises first computing module 22 and second computing module 24.Wherein first computing module 22 is coupled to second computing module 24.
In this embodiment, means for correcting 2 is as the position of proofreading and correct first photo-sensitive cell 14 (or second photo-sensitive cell 16) or the foundation of angle according to the point of a known coordinate system, several known coordinates and the detected observation image of first photo-sensitive cell 14 (or second photo-sensitive cell 16).Absolute position of first photo-sensitive cell 14 after overcorrect (or second photo-sensitive cell 16) (i.e. the first predeterminated position D or the second predeterminated position F) or angular characteristics are to represent with above-mentioned coordinate system, and can carry out the touch points location and the state-detection of optics touch screen according to these data.
Next, each module and the function thereof that are comprised to means for correcting 2 are respectively introduced.In this embodiment, the true origin of the coordinate system that is adopted is T1 (0,0); Means for correcting 2 adjusted to as if the position and the angle of second photo-sensitive cell 16.In fact, means for correcting 2 can carry out the correction of position and angle to any one photo-sensitive cell that optical touch control type screen 1 is comprised, and does not exceed with this example.
Please with reference to Fig. 2 (B), Fig. 2 (B) is the detailed functions calcspar that illustrates first computing module 22.Shown in Fig. 2 (B), first computing module 22 comprises first processing unit 222, second processing unit 224 and the 3rd processing unit 226.Wherein first processing unit 222 is coupled to second processing unit 224; The 3rd processing unit 226 is coupled to first processing unit 222 and second processing unit 224.
What need explanation is, because the arithmetic element processing power is powerful now, therefore can also single processing unit replaces first processing unit 222, second processing unit 224 and the 3rd processing unit 226; Identical ground, first computing module 22 and second computing module 24 can also single module or processing unit can realize means for correcting 22; Present embodiment only is in order to convenient explanation, but not in order to limit the present invention.
At first, first processing unit 222 of first computing module 22 will produce the first boost line L1 and the second boost line L2 according to the first indication point P1, the second indication point P2 and the second specified point T2.Shown in Fig. 3 (A), first processing unit 222 connect the second specified point T2 and the first indication point P1 with form the first boost line L1 and be connected the second specified point T2 and the second indication point P2 to form the second boost line L2.
Then, second processing unit 224, the first auxiliary point P1 ' that will determine to lay respectively at the first boost line L1 both sides and the second auxiliary point P1 ＂ and the 3rd auxiliary point P2 ' and the 4th auxiliary point P2 ＂ that lay respectively at the second boost line L2 both sides.How put up with second processing unit 224 below produces each auxiliary point and introduces.
Please earlier with reference to Fig. 3 (B), Fig. 3 (B) be illustrate that second photo-sensitive cell 16 sensed first observe the synoptic diagram of image I 1.In this embodiment, second processing unit 224 is on screen, to produce 2 approaching arbitrarily P1 ' and P1 ＂, if P1 ' is vertical with the first boost line L1 with the online of P1 ＂, and P1 ' and the observation point I of P1 ＂ in the first observation image I 1
P1 'And I
P1 ＂Be positioned at the observation point I of the first indication point P1
P1Both sides, then P1 ' and P1 ＂ promptly satisfy the requirement of first auxiliary point and second auxiliary point.
In like manner, please with reference to Fig. 3 (C), Fig. 3 (C) be illustrate that second photo-sensitive cell 16 sensed second observe the synoptic diagram of image I 2.If P2 ' that second processing unit 224 produces on screen and P2 ＂'s is online vertical with the second boost line L2, and P2 ' and the observation point I of P2 ＂ in the second observation image I 2
P2 'And I
P2 ＂Be positioned at the observation point I of the second indication point P2
P2Both sides, then P2 ' and P2 ＂ promptly satisfy the requirement of the 3rd auxiliary point and the 4th auxiliary point.
Afterwards; Second processing unit 224 will determine the 3rd indication point P3 and determine the 4th indication point P4 according to the second boost line L2, the 3rd auxiliary point P2 ' with the 4th auxiliary point P2 ＂ with the second auxiliary point P1 ＂ according to the first boost line L1, the first auxiliary point P1 ', shown in Fig. 3 (A).
In this embodiment, second processing unit 224 determines the 3rd indication point P3 and the 4th indication point P4 through interpolation method.Shown in Fig. 3 (B), observe in the image I 1 first, because the observation point I of the corresponding first auxiliary point P1 '
P1 'Observation point I with the corresponding second auxiliary point P1 ＂
P1 ＂Lay respectively at the observation point I of the corresponding first indication point P1
P1Both sides, so second processing unit 224 can calculate I
P1 'To I
P1Distance and I
P1 ＂To I
P1Distance between first distance obtain the position of the 3rd indication point P3 by following equation than a:b and according to interpolation method.
In like manner, shown in Fig. 3 (C), observe in the image I 2, because the observation point I of corresponding the 3rd auxiliary point P2 ' second
P2 'Observation point I with corresponding the 4th auxiliary point P2 ＂
P2 ＂Lay respectively at the observation point I of the corresponding second indication point P2
P2Both sides, so second processing unit 224 also can calculate I
P2 'To I
P2Distance and I
P2 ＂To I
P2Distance between second distance obtain the position of the 4th indication point P4 by following equation than c:d and according to interpolation method.
Shown in Fig. 4 (A); After the 3rd indication point P3 and the 4th indication point P4 are by 224 decisions of second processing unit, the 3rd processing unit 226 will connect the first indication point P1 and the 3rd indication point P3 with form the first straight line L1 ' and be connected the second indication point P2 and the 4th indication point P4 to form the second straight line L2 '.Please with reference to Fig. 4 (B) and Fig. 4 (C), Fig. 4 (B) and Fig. 4 (C) are illustrate respectively that second photo-sensitive cell 16 sensed the 3rd observe image I 3 and the 4th and observe the synoptic diagram of image I 4.
Shown in Fig. 4 (B) and Fig. 4 (C), the 3rd observes the observation point I of the correspondence first indication point P1 of I3 in the image
P1Observation point I with corresponding the 3rd indication point P3
P3Overlap, and the 4th observe the correspondence second indication point P2 of I4 in the image observation point I
P2Observation point I with corresponding the 4th indication point P4
P4Overlap, the intersection point that is intersected through the first straight line L1 ' of the first indication point P1 and the 3rd indication point P3 and the second straight line L2 ' through the second indication point P2 and the 4th indication point P4 is the second predeterminated position F of second photo-sensitive cell 16.
Likewise, first computing module 22 is according to the first predeterminated position D of above-mentioned first photo-sensitive cell 14 that also can obtain.
After first computing module 22 was obtained the second predeterminated position F, second computing module 24 promptly can obtain the correction function relevant with the angle of second photo-sensitive cell 16 according to eight the RP R1～R8 and the second predeterminated position F of known coordinate that panel 12 shows.Next, how put up with second computing module 24 produces correction function and carries out detailed introduction.
Shown in Fig. 5 (A), the second predeterminated position F that second computing module 24 will be earlier be tried to achieve according to first computing module 22 produces one through the second predeterminated position F and be parallel to the datum line L0 of x axle (outer rim of panel 12).In addition, second computing module 24 also can connect the second predeterminated position F and RP R1～R8 respectively to form eight reference line L
R1～L
R8Wherein each coordinates of reference points be respectively R1 (x1, y1), R2 (x2, y2), R3 (x3, y3) ... and R8 (x8, y8).Because each bar reference line L
R1～L
R8And angle theta is all arranged between datum line L0, so second computing module 24 can be defined as these angles with reference to angle θ
1～θ
8
Please with reference to Fig. 5 (B), Fig. 5 (B) be illustrate that second photo-sensitive cell 16 senses the 5th observe the synoptic diagram of image I 5.Shown in Fig. 5 (B), observe in the image I 5 I in the 5th
R1～I
R8Be the RP of representing corresponding RP R1～R8 respectively, and I
R1～I
R8Can't overlap to each other and (promptly observe under the image I 5 coordinate system Ix each corresponding RP I in the 5th
R1～I
R8The different reference coordinate value of difference tool).
Because it is known that the coordinate of the RP R1～R8 and the second predeterminated position F is all, so it is corresponding with reference to angle θ
1～θ
8All can try to achieve, therefore, second computing module 24 can be according to the corresponding RP I of RP R1～R8 in the 5th observation image I 5
R1～I
R8With with reference to angle θ
1～θ
8Produce correction function.Please with reference to Fig. 6, Fig. 6 illustrates corresponding to corresponding RP I
R1～I
R8The angularity correction function # (Ix) of Ix coordinate figure.As shown in Figure 6, the stain of Fig. 6 is the Ix coordinate figure I of each corresponding RP
R1～I
R8Corresponding to respectively angle θ
1～θ
8Corresponding relation.
In this embodiment; Equation for the angularity correction function # (Ix) that can obtain corresponding above-mentioned corresponding relation; Second computing module 24 carries out the program of match through the mode of numerical analysis and curve fitting (curve-fitting) to the curve of Fig. 6, but does not in fact exceed in this way.In an embodiment, be to adopt conic fitting, promptly correction function θ (Ix) is θ (Ix)=a
0+ a
1(Ix)+a
2(Ix)
2Aspect, a wherein
0, a
1And a
2Be parameter of curve, carry out matrix operation through second computing module 24 after, can try to achieve parameter of curve a
0, a
1And a
2Value.Therefore, second computing module 24 can be confirmed the equation of angularity correction function # (Ix).
At last, second computing module 24 can calculate the angle of any touch points with respect to datum line L0 according to the angularity correction function # (Ix) that is determined.When user's contact surface plate 12 when producing arbitrarily touch points, will be to the Ix coordinate figure (for example being In) of corresponding RP that should touch points, substitution θ (Ix)=a
0+ a
1(Ix)+a
2(Ix)
2In (be θ (In)=a
0+ a
1(In)+a
2(In)
2), can obtain to should touch a little and datum line L0 between angle theta (being θ (In)).In like manner, first photo-sensitive cell 14 also can be tried to achieve corresponding angularity correction function # (Ix) according to above-mentioned steps.
In practical application; Obtain the position and angle distribution information of first photo-sensitive cell 14 that optical touch control type screen 1 comprised and second photo-sensitive cell 16 when means for correcting 2 after; Optical touch control type screen 1 can use trigonometric function and triangle location (because the predeterminated position of first photo-sensitive cell 14 and second photo-sensitive cell 16 tries to achieve all, the relative distance that therefore can calculate first photo-sensitive cell 14 and second photo-sensitive cell 16 adds that touch points is respectively with respect to the angle of first photo-sensitive cell 14 and second photo-sensitive cell 16) to determine the touch points on the screen; In addition, except the location of carrying out touch points, also fechtable reaches the effect of gesture acquisition input again corresponding to the image of user's gesture through image processing techniques and gesture identification technique.
Second specific embodiment according to the present invention is a kind of bearing calibration.This bearing calibration can be applicable to comprise the image processing apparatus (for example optical touch control type screen) of panel and at least one photo-sensitive cell, and carries out the correction of position and angle to its photo-sensitive cell.In this embodiment, show first indication point, second indication point and a plurality of RPs of known coordinate of known coordinate on the panel, this at least one photo-sensitive cell is to be positioned on the other predeterminated position of the specified point of panel outer rim.
See also Fig. 7, Fig. 7 is the process flow diagram that illustrates this bearing calibration.As shown in Figure 7, this bearing calibration is broadly divided into two stages: (among the step S10～S12), this bearing calibration will determine the predeterminated position of this at least one photo-sensitive cell in the phase one; (among the step S13～S16), this bearing calibration will further produce correction function between coordinate and angle to calculate the touch points angle of this at least one photo-sensitive cell relatively in subordinate phase.
In the phase one, at first, this bearing calibration execution in step S10, decision is positioned at the 3rd indication point and the 4th indication point on the panel according to the specified point of first indication point, second indication point and panel outer rim.In fact, as shown in Figure 8, step S10 can be divided into following three sub-steps S101～S103.In an embodiment, this specified point can be the summit in the panel upper left corner or the summit in the panel upper right corner (like T1 or the T2 of Fig. 3 (A)).
In substep S101, this bearing calibration connect specified point and first indication point with form first boost line and be connected specified point and second indication point to form second boost line; In substep S102, this bearing calibration determines first auxiliary point and second auxiliary point and determines the 3rd auxiliary point and the 4th auxiliary point according to second boost line according to first boost line; In substep S103, this bearing calibration determines the 3rd indication point and determines the 4th indication point according to second boost line, the 3rd auxiliary point and the 4th auxiliary point according to first boost line, first auxiliary point and second auxiliary point.
In fact, in substep S102, first auxiliary point and second auxiliary point are the both sides that are positioned at first boost line, and can be vertical with first boost line through the straight line of first auxiliary point and second auxiliary point; The 3rd auxiliary point and the 4th auxiliary point are the both sides that are positioned at second boost line, and can be vertical with second boost line through the straight line of the 3rd auxiliary point and the 4th auxiliary point.
In addition, in substep S103, the 3rd indication point is to get than calculating according to first auxiliary point, second auxiliary point and first distance; The 4th indication point is to get than calculating according to the 3rd auxiliary point, the 4th auxiliary point and second distance.Wherein first distance is than being the distance dependent with the distance and second auxiliary point to the first boost line of first auxiliary point to the first boost line; Second distance is than being the distance dependent with the distance and the 4th auxiliary point to the second boost line of the 3rd auxiliary point to the second boost line.
In this embodiment, this at least one photo-sensitive cell will produce according to first indication point, second indication point, the 3rd indication point and the 4th indication point and observe image.Observe in the image in this, first observation point of corresponding first indication point is a dissimilarity with second observation point of corresponding second indication point; The 3rd observation point of corresponding the 3rd indication point and first observation point are identical point and are identical point corresponding to the 4th observation point and second observation point of the 4th indication point.
Then, this bearing calibration execution in step S11 is according to the predeterminated position that determines this at least one photo-sensitive cell through first straight line of first indication point and the 3rd indication point and through second straight line of second indication point and the 4th indication point.In fact; This bearing calibration can connect first indication point and the 3rd indication point with form first straight line and connect second indication point and the 4th indication point to form second straight line; Because first straight line and second straight line will intersect at an intersection point (that is focus of this at least one photo-sensitive cell), this bearing calibration is that this intersection point of definable is the predeterminated position of being asked.
Next, this bearing calibration promptly begins to get into subordinate phase.In subordinate phase, at first, this bearing calibration execution in step S12 produces through predeterminated position and is parallel to the datum line of panel outer rim.
Then, this bearing calibration execution in step S13 forms many reference lines according to a plurality of RPs and predeterminated position, and forms a plurality of with reference to angle according to many reference lines and datum line.For example; If always have five RPs; This bearing calibration can connect these five RPs and predeterminated position respectively to form five different reference lines; Because these five reference lines will form different angles with datum line respectively, so this bearing calibration can be defined as five different reference angles with these angles.
Because those coordinates of reference points are known and each is also obtained with reference to angle; So this bearing calibration execution in step S14; Produce the corresponding a plurality of RPs of difference in a plurality of RP coordinates of the observation image of at least one photo-sensitive cell; Then, this bearing calibration execution in step S15 is according to a plurality of RP coordinates and a plurality of with reference to angle generation correction function.Produce correction function according to each coordinates of reference points and each corresponding relation with reference to angle.In practical application, correction function can produce through mode match one curve of curve fitting, and wherein this curve is and coordinates of reference points and relevant with reference to angle.
At last, this bearing calibration execution in step S16 calculates the touch points angle of this datum line relatively according to this correction function.
In practical application, this correcting mode can be further through the relative distance of two photo-sensitive cells and a touch points respectively to the coordinate of this touch points of angle decision of datum line that should two photo-sensitive cells.
Compared to prior art; Correction according to the present invention put and method can be effectively according to several indication points of known coordinate on the panel of image processing apparatus; Carry out the correction of position and angle for each photo-sensitive cell in the image processing apparatus, to avoid causing the wrongheaded situation of touch points to take place owing to the position and the angle generation deviation of photo-sensitive cell.By this, can significantly promote the degree of accuracy that image processing apparatus detects touch points state or identification gesture according to means for correcting of the present invention and method.
Through the detailed description of above preferred embodiment, be to hope to know more to describe characteristic of the present invention and spirit, and be not to come category of the present invention is limited with the above-mentioned preferred embodiment that is disclosed.On the contrary, its objective is that hope can contain in the category of claim scope of being arranged in of various changes and tool equality institute of the present invention desire application.Therefore, the category of the claim scope that the present invention applied for should be done the broadest explanation according to above-mentioned explanation, contains the arrangement of all possible change and tool equality to cause it.
Claims (14)
1. bearing calibration; Be applied to image processing apparatus; This image processing apparatus comprises panel and at least one photo-sensitive cell; On this panel, show first indication point, second indication point and a plurality of RP of known coordinate, this at least one photo-sensitive cell is the other predeterminated position of specified point that is positioned at this panel outer rim, and this method comprises the following step:
(a) be positioned at the 3rd indication point and the 4th indication point on this panel according to this first indication point, this second indication point and the decision of this specified point;
(b) definition is this predeterminated position through first straight line of this first indication point and the 3rd indication point and through the crossing intersection point of second straight line of this second indication point and the 4th indication point;
(c) produce through this predeterminated position and be parallel to the datum line of this panel outer rim;
(d) form many reference lines according to these a plurality of RPs and this predeterminated position, and form a plurality of with reference to angle according to these many reference lines and this datum line;
(e) be created under the coordinate system of observation image of this at least one photo-sensitive cell, a plurality of RP coordinates corresponding respectively with these a plurality of RPs; And
(f) produce correction function according to these a plurality of RP coordinates and this are a plurality of with reference to angle,
Wherein step (a) comprises following substep:
(a1) connect this specified point and this first indication point with form first boost line and be connected this specified point and this second indication point to form second boost line;
(a2) determine first auxiliary point and second auxiliary point and determine the 3rd auxiliary point and the 4th auxiliary point according to this first boost line according to this second boost line; And
(a 3) determine the 4th indication point according to this first boost line, this first auxiliary point and this second auxiliary point decision the 3rd indication point and according to this second boost line, the 3rd auxiliary point and the 4th auxiliary point,
Wherein in step (a2); This first auxiliary point and this second auxiliary point are the both sides that are positioned at this first boost line; And the straight line through this first auxiliary point and this second auxiliary point is vertical with this first boost line; The 3rd auxiliary point and the 4th auxiliary point are the both sides that are positioned at this second boost line, and vertical with this second boost line through the straight line of the 3rd auxiliary point and the 4th auxiliary point
Wherein in step (a3); The 3rd indication point is to get than calculating according to this first auxiliary point, this second auxiliary point and first distance; The 4th indication point is to get than calculating according to the 3rd auxiliary point, the 4th auxiliary point and second distance; This first distance is than being the distance dependent with distance and this second auxiliary point to this first boost line of this first auxiliary point to this first boost line, and this second distance is than being the distance dependent with distance and the 4th auxiliary point to this second boost line of the 3rd auxiliary point to this second boost line.
2. method according to claim 1; Wherein this at least one photo-sensitive cell produces first according to this first indication point, this second indication point, the 3rd indication point and the 4th indication point and observes image; In this first observation image; Is dissimilarity corresponding to first observation point of this first indication point with second observation point corresponding to this second indication point; The 3rd observation point and this first observation point corresponding to the 3rd indication point are identical point, are identical point corresponding to the 4th observation point and this second observation point of the 4th indication point.
3. method according to claim 2, wherein this at least one photo-sensitive cell produces second according to these a plurality of RPs and observes image, in this second observation image, is dissimilarity corresponding to a plurality of of these a plurality of RPs with reference to observation point.
4. method according to claim 1, wherein in step (f), this correction function is that mode match one curve through curve fitting produces, this curve is a plurality of relevant with reference to angle with these a plurality of RP coordinates and this.
5. method according to claim 1, wherein this specified point is the summit in the panel upper right corner or the summit in the panel upper left corner.
6. method according to claim 1 further comprises the following step:
(g) calculate the touch points angle of this datum line relatively according to this correction function.
7. means for correcting; Be applied to image processing apparatus; This image processing apparatus comprises the panel and first photo-sensitive cell; On this panel, show first indication point, second indication point and a plurality of RP of known coordinate, this first photo-sensitive cell is the other predeterminated position of specified point that is positioned at this panel outer rim, and this means for correcting comprises:
First computing module is coupled to this panel; This first computing module determines to be positioned at the 3rd indication point and the 4th indication point on this panel according to this first indication point, this second indication point and this specified point, and definition is this predeterminated position through first straight line of this first indication point and the 3rd indication point and through the crossing intersection point of second straight line of this second indication point and the 4th indication point;
Second computing module is coupled to this first computing module and this panel; This second computing module forms many reference lines and forms a plurality of with reference to angle according to these many reference lines and a datum line according to these a plurality of reference points and this predeterminated position; And be created under the observation image coordinate system of this first photo-sensitive cell, corresponding with these a plurality of reference points a plurality of reference point coordinates respectively; Produce correction function according to these a plurality of reference point coordinates and this are a plurality of with reference to angle; Wherein this datum line is by this predeterminated position and is parallel to this panel outer rim
Wherein this first computing module comprises:
First processing unit, in order to connect this specified point and this first indication point with form first boost line and be connected this specified point and this second indication point to form second boost line;
Second processing unit is coupled to this first processing unit; The 3rd auxiliary point and the 4th auxiliary point that this second processing unit decision lays respectively at first auxiliary point and second auxiliary point of these first boost line both sides and lays respectively at these second boost line both sides; And according to this first boost line, this first auxiliary point and this second auxiliary point decision the 3rd indication point and according to this second boost line, the 3rd auxiliary point and the 4th auxiliary point decision the 4th indication point
Wherein this first boost line is vertical with straight line through this first auxiliary point and this second auxiliary point and this second boost line is with vertical with the straight line of the 4th auxiliary point through the 3rd auxiliary point,
Wherein this second processing unit according to this first auxiliary point, this second auxiliary point and first distance than decision the 3rd indication point; And according to the 3rd auxiliary point, the 4th auxiliary point and second distance ratio decision the 4th indication point; This first distance is than being the distance dependent with distance and this second auxiliary point to this first boost line of this first auxiliary point to this first boost line, and this second distance is than being the distance dependent with distance and the 4th auxiliary point to this second boost line of the 3rd auxiliary point to this second boost line.
8. means for correcting according to claim 7; Wherein this first photo-sensitive cell produces first according to this first indication point, this second indication point, the 3rd indication point and the 4th indication point and observes image; In this first observation image; Is dissimilarity corresponding to first observation point of this first indication point with second observation point corresponding to this second indication point; The 3rd observation point and this first observation point corresponding to the 3rd indication point are identical point, are identical point corresponding to the 4th observation point and this second observation point of the 4th indication point.
9. means for correcting according to claim 8, wherein this first photo-sensitive cell produces second according to these a plurality of RPs and observes image, in this second observation image, is dissimilarity corresponding to a plurality of of these a plurality of RPs with reference to observation point.
10. means for correcting according to claim 7, wherein to produce this correction function, this curve is a plurality of relevant with reference to angle with these a plurality of RP coordinates and this to this second computing module through mode match one curve of curve fitting.
11. means for correcting according to claim 7, wherein this specified point is the summit in the panel upper right corner or the summit in the panel upper left corner.
12. means for correcting according to claim 7, wherein this correction function calculates the touch points angle of this datum line relatively.
13. means for correcting according to claim 7, wherein this image processing apparatus also comprises second photo-sensitive cell, and wherein this first computing module determines the predeterminated position of this second photo-sensitive cell, and this second computing module produces the correction function of this second photo-sensitive cell.
14. means for correcting according to claim 13; Wherein this means for correcting produces the relative distance of this first photo-sensitive cell and this second photo-sensitive cell according to the predeterminated position of this first photo-sensitive cell and this second photo-sensitive cell, and according to a touch points respectively relatively the angle of this first photo-sensitive cell and this second photo-sensitive cell determine the coordinate of this touch points.
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| CN102331890A (en) * | 2011-10-24 | 2012-01-25 | 苏州佳世达电通有限公司 | Optical touch screen and optical sensing correction method thereof |
| TWI454999B (en) * | 2011-11-21 | 2014-10-01 | Wistron Corp | An optical touch display, a calibration apparatus and a calibration method thereof |
| TWI464650B (en) * | 2011-12-02 | 2014-12-11 | Wistron Corp | Optical touch module and related method of rotary angle adjustment |
| TWI475446B (en) * | 2012-04-24 | 2015-03-01 | Wistron Corp | Optical touch control system and capture signal adjusting method thereof |
| JP6111706B2 (en) * | 2013-02-01 | 2017-04-12 | セイコーエプソン株式会社 | Position detection apparatus, adjustment method, and adjustment program |
| CN105975132B (en) * | 2016-05-05 | 2019-07-19 | 青岛歌尔声学科技有限公司 | A kind of detection method and device of touch screen accuracy |
| CN109471542B (en) * | 2018-11-07 | 2022-08-26 | 合肥禾斗技汇科技有限公司 | Positioning system |
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| CN1949887A (en) * | 2005-10-13 | 2007-04-18 | 致茂电子股份有限公司 | Flat resolution correcting method for image optical system and apparatus thereof |
| CN101242546A (en) * | 2007-02-06 | 2008-08-13 | 鸿富锦精密工业（深圳）有限公司 | Image correction system and method |
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| CN1949887A (en) * | 2005-10-13 | 2007-04-18 | 致茂电子股份有限公司 | Flat resolution correcting method for image optical system and apparatus thereof |
| CN101242546A (en) * | 2007-02-06 | 2008-08-13 | 鸿富锦精密工业（深圳）有限公司 | Image correction system and method |
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