TW201207702A - Method for determining positions of touch points on an optical touch panel - Google Patents

Abstract

A first image capturing device and a second image capturing device capture first and second real point images each including an image of a plurality of touch points on an indication region of an optical touch panel. The first and the second real point images outline a plurality of candidate regions on the indication region; one of the plurality of candidate regions is selected to be the verifying region. A captured image characteristic is obtained by capturing a touch point image from the verifying region through a mirror of the optical touch panel, and whether the verifying region corresponds to one of the plurality of touch points is determined according to the captured image characteristic.

Description

201207702 VI. Description of the Invention: [Technical Field of the Invention] The invention relates to an optical touch screen. The present invention relates to an optical touch screen, and more particularly to a method of being touched. [Prior Art] With the maturity of touch technology, touch devices with large-size display panels and multi-touch technology have gradually become the mainstream of the market, and are widely used in various electronic products, such as ATMs, handheld devices. Electronic devices and displays. In general, the touch f technology can be divided into three types: hybrid, capacitive, and squat. Its towel resistance and _ touch screen technology system _ 接 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ The optical touch screen technology side is used to position the object when the touch 3 moves, causing the light path to block or the light and shadow to change. Compared with Yu Yu, I have a relatively low-cost financial system, which is relatively simple. Because of the optical production, the production of f and components, the real money _ sec, the wire is more resistive and capacitive. In the case of fine, silk, and cost control, it is easy to cause a misjudgment of the touch points at the eve point because a plurality of light paths are blocked. Lai, first she (four) points to touch the touch point 'but 201207702 as edited badly. Please refer to Figure 1, the first picture shows the optical touch screen in the case of multi-touch, because of multiple light paths The virtual solution (fine p〇int) formed by the block diagram of the touch point shown in Figure 1 'The light path emitted by the light source LG1, LG2 is actually solved (four) (four) buckle) Touch point OP dip P2 block After the 'previously technical optical touch county, because only the light path is judged to be __ (the _ of the object is not judged), in addition to the actual control points 0P1 and OP2, the blocked light is also The co-construction intersection of the paths produces virtual touch points GP1, GP2. Because of the existence of virtual touch points, when the multi-touch on the prior art optical touch screen has two or two real touches at the same time, the prior art optical touch screen is There may be a situation where the side-by-side error occurs, causing confusion for the user. SUMMARY OF THE INVENTION An embodiment of the present invention provides a method for determining a position at which a plurality of touch input points touch an indication area of an optical touch screen that is actually touched. The optical touch screen comprises a - camera unit, a second camera, a light module and a mirror surface. The first image capturing unit and the second image capturing unit obliquely capture images from the pointing area. The light-emitting module is configured to measure the light guide in the indication area by the first and second camera. The mirror surface is disposed opposite to the I and the second camera unit. The green color includes: causing the first camera unit to generate a first-real image to the indication area image; and causing the second camera unit to capture an image to the indication area to generate a second real image, wherein the first real image A plurality of candidate regions are generated in the pointing area corresponding to the second real image, and a to-be-detected area is selected from the plurality of candidate regions in the 201207702; the touch input point is captured through the mirror in the to-be-detected area The image is generated by taking an image feature, and determining, according to the acquired image feature, one of the actual number of the shirts in the to-be-side region. Another example of this month provides a way to determine where the plurality of side-control input points touch the optical touch screen and the area where the area is actually touched. The optical touch screen comprises -, - an image capturing unit, a second camera unit, a lighting module and a mirror surface. The first imaging early 7C and the second imaging unit obliquely point to the indication area. The illumination module is configured to direct light into the indication area and be sensed by the first and second camera units. The mirror system is provided for the first and second camera units. The method includes: (8) using the first camera unit to capture an image from the indication area to generate a first real point image; (9) using the first camera unit to capture an image through the mirror toward the finger field to generate a first virtual point image '(C) using the 5th second camera unit to capture an image from the indication area to generate a second real point image, /, towel 4# image and the S 2 image corresponding to the region to generate a plurality of solid candidate regions; d) extinguishing the complex health zone towel at least - region generation - the real point may be divided into Φ cloth regions; (e) generating a first reconstructed image corresponding to the mirror surface corresponding to the real point possible distribution region, the first real image and the The first reconstructed image generates a first virtual point reconstructed image; (f) determining, according to the first virtual point image and the first virtual point reconstruction image, whether the real point possible distribution area corresponds to at least one of the plurality of touch input points. Therefore, the method provided by the present invention can eliminate the virtual touch point caused by the multi-touch situation and correctly determine the position of the optical hard screen. 201207702 [Embodiment] One. Month > Test No. 2 FIG. 2 is an embodiment of the optical touch screen 2 of the present invention. The light-sensitive touch screen 2 includes an indication area 2A, a first image pickup unit 22, and a first image unit. The camera unit 24, the mirror surface 26, a light-emitting module and a processing unit%. The heart area or the 2 line is used to provide contact with the object to be tested, and the position of the object touching the indication area 20 is the touch input point. In the present embodiment, the indication area is defined by the left edge 2, 2, the bottom, the right edge 206, and the upper edge 208. The left edge 2〇2 and the upper edge 2〇8 form a left upper corner (the right edge 2〇6 and the upper edge 208 form a right upper corner C2, and the upper edge 208 and the edge 204 are opposite. The first camera unit 22 is disposed. On the upper left corner and the first-photographing unit it 247 is placed on the upper right side of the C2, and the image is taken obliquely to the indication area 2, for example, the first camera unit 22 is moved to the corresponding lower edge and right edge. The image is taken off, and the first camera unit 22 performs an image on the range corresponding to the left edge 2 () 2 and the lower edge. When the object to be tested contacts the indication area 2 , the light corresponding to the lower edge and the right edge 206 Part of the light emitted by the module 27 is blocked by the object to be tested, so that the first camera unit 22 generates a first real image n; likewise, the corresponding light source module 27 corresponding to the left edge and the lower edge 204 is emitted. A part of the light is blocked by the object to be tested, and a second real image 12 is generated by the second image capturing unit 24. The light emitting module 27 is configured to enter the light into the indication area 2G so that the first and second camera units 22 And capturing the first-real image: the second real image 12. The mirror 26 is disposed at a position relative to the first and second camera units 22 24, the edge 204, the mirror-symmetric position of the reflective indication area 2, the first imaging unit 22, and the second imaging unit 24 generates a mirror indication area 2, the first mirror image unit 22' and the second mirror image unit 24'. The processing unit 28 is coupled to the first camera unit 22 and the second camera unit 24' for processing the first real image u and the second 201207702 real image 12. When a plurality of objects contact the indication area 2 () The processing unit 帛 can control the illuminating module 27 to make the 帛—and the second photographic element 22, the second _ and the second real image η, π. It is assumed that the number of objects to be tested in the contact indicating area 20 is 2, and the contact pointing area is like η, 12 + 'touch input point 〇 〇 2 will correspond to the touch input point image Pa, Pb on the lens of the first camera unit 22, and the second camera unit 24 touch input point images Pe, Pd on the lens. The processing material 28 separates the touch-like images Pa, Pb, Pe, Pd according to the preset angle array (angle), and the nd processing unit 28 according to the lost angle (6) on the first real point shadow, this generates a plurality of ~ image interval Α, The processing unit 28 generates a plurality of second image intervals c and D according to the angles d and D on the second real image 12. The touch input points (7), (7) may be located = candidate regions AC, BD, BC, AD The plurality of first image sections a and B are combined with the plurality of first image sections c and D. The processing unit Μ can use the triangulation method to know the position of the first and second imaging units 22 and 24 and the angle. For example, the positions of the candidate regions AC, BD, BC, and AD are respectively calculated. The first camera units 22 and 24 may be line sensors (area sens〇r) or area sensors (area sens〇r). , but not limited to this. The light-emitting module 27 of the optical touch screen 2 can be implemented as a retroreflector or a light guard, but is not limited to this example, if the light-emitting module 27 of the optical touch screen 2 is guided by When the light panel is implemented, the light-emitting module 27 includes an upper light guide plate disposed on the upper edge 208 of the indication area 2; the 201207702 and the right edge 2 light plate and the second side light guide plate are disposed on the left edge 202 of the indication area 20 and Right edge 206; - The next invitation to the heart of the 28 to (four) peach, set in the lower margin of the 2G. When processing the single-month 匕帛 camera early element 22 to operate the first real point screen 2 to open, the second side light guide plate of the guide plate and the right edge 2〇6 under the τ channel 丄1 of the edge 204, the lower light guide =- Side light guides are attached to different days. When processing a single (four) enables the first camera I: i to pass its mirror symmetrical position (equivalent to using the first mirror camera unit for two days: the optical touch screen (10) upper edge 2〇8 above the light guide plate and the right edge Applying -= light guide plate' and the upper light guide plate and the second light-emitting plate are opened at different time periods. When processing the early 7L 28 enabling the second camera unit to capture the second real-point image 12, the optical touch screen 2 The light guide plate at the lower edge 2〇4 and the first side calender plate at the left edge 2〇2 are opened, and the lower light guide plate and the first-light plate are opened at different time periods. The mirror is facing the age (made in the Gudi-mirror camera unit... When the image is taken, the optical touch screen 2 is opened on the upper edge of the light guide plate and the right edge is applied to the second side light guide plate. The two side light guide plates are opened at different time periods. Please refer to Fig. 3. The third embodiment is a schematic diagram of the embodiment when the light module 27 of the optical touch screen 2 of Fig. 2 is a retroreflector. The optical touch screen 2 of the figure is similar to the second figure, except that in the embodiment, the __ and the second camera unit ^% are area sensors, and the light is emitted. The module is a retroreflector RR, and the first and second camera units U, 24 are respectively provided with a light source. As shown in the bird's eye diagram (4) of the optical touch screen 2, the upper edge 208 and the left edge of the indication area 20 are provided. 202 and the right edge 206 are respectively provided with the upper and lower layers of the retroreflector RR; the lower edge 204 of the indication area 20 is provided with the overlapping mirror % and the retroreflector RR, wherein the mirror surface 26 is overlapped on the lower edge 2〇4 Above the retroreflector 2012 201207702 As shown in the section _ of the optical touch screen 2, the lower half of the image unit 24 is opposite to the mirror 26, with _ 2 () 2 and the lower edge 2 〇 6 under the layer The retrospective is the first line of the retroreflection and the mirrored retroreflective light at the lower edge of the lower edge 2〇4. The corner is H41. The fourth figure is the processing unit 28 according to the second figure according to the preset unit 22. The touch input point image pa and the touch input point image Pe of the second camera unit are respectively converted into a schematic diagram of the clip (four) ★. If the 4th = 'the touch input point image on the first camera unit 22 _ should be A camera single = 2 has a pixel starting position Pa_UPa_e, and the second camera unit has a touch input point impurity Pe _, and the second shooting element 24 has a complex Position & s PC'6 〇4ί1^ 28 ^ table)a^ : a-s position takes an angle - 'angle angle - corresponding to the angle from the upper edge to the pixel = rpa-s - angle; The angle of the job _ according to the likes of the magpie position Pa s to obtain an angle such as - e, the angle of the angle - e corresponds to the angle from the upper edge to the image position Pa - e. The angle between the knowledge - s and know the difference for the first camera Early W2 touch input point image pa clip (four). Similarly, the processing unit Μ using the preset angle array according to the touch input point image & image start position pc-s and Pc_e respectively obtained The difference between the angle of the contact point and the angle of the clip (four)-s and the angle is the angle corresponding to the image of the touch input point on the second camera unit 24. The processing unit 28 can calculate the intersection point, that is, the center point (xc, yc) of the candidate area AC, by using the triangulation method according to the angle bisector of the angle and the angle bisector of the 201207702 angle. The calculation of the remaining angle and the center point of the candidate area and so on. Please refer to FIG. 5'. FIG. 5 is a flow chart showing a method 5 for determining the position of the optical touch screen 2 in which the area of the optical touch screen 2 is actually touched. The method of FIG. 5 is illustrated by the optical touch screen 2 shown in FIG. 2, and the steps are as follows: Step 500. Using the first imaging unit 22 to image the indication area 2 to generate the first real image II; Step 5〇2: Using the second imaging unit μ to capture an image to the indication area 2 to generate a second real-point image 12; Step 504. According to the first-real conversion and the second real-point shadow (four), multiple numbers are generated. a candidate region, in the second embodiment, for example, ac, bd, bc, ad; Step 506: selecting one of the plurality of candidate regions AC, BD, Bc, and ad as the to-be-detected region; The touch area input image is captured to generate a captured image feature; Step 51: According to the captured image feature, it is determined whether the area to be detected actually corresponds to the touch input point of the object to be tested. one. In the preferred embodiment, the method of the present month generates a plurality of candidate regions, and then calculates the ratio of the secrets of the parent-candidate region to the mirror image capturing unit 22, or/and the second mirror image capturing unit. In order to determine the probability that the sugar input point is located in each 201207702 candidate area. The proportion (4) covered by the image of the first mirror image unit ^, or / and the second mirror image unit 24' in each candidate region should be taken in step = = image feature. For example, please refer to Fig. 6. Fig. 6 is a schematic diagram for explaining the ratio of the candidate region AC to the image-capturing unit 22, which is taken in the second figure. As shown in FIG. 6 , the candidate region ^ is used as the to-be-detected region, and the plurality of touch regions have a plurality of candidate regions, and the candidate region AC has four endpoints (4), yl), (x2, y2). ), (χ3, y3), (χ4, state. According to the position of the repair-mirror camera unit 22' and the two end points of the candidate area AC, a trigonometric function such as shouting ngent is used to generate a first expected angle ~ called ac, Reusing an angle table obtains a -pre-premature length ρι Εχ_^. The first pixel length PI Expeeted-AC is on the first mirror image unit 22, and has a pixel start position ρι

Expected_AC_s, PI Expected_AC E. In a preferred embodiment, the two end points of the candidate area AC are the substantially left and right end points (χ2, y2) and (χ4, (4) of the candidate area AC. Then, the first-mirror imaging unit 22' is in the first-expected Whether the touch input point image is generated in the range of the pixel length ρ1 ε__, in this embodiment is the first observed pixel length? 1 • Observed-AC' uses the preset angle array 'to make the first observed pixel long

^ ^ r 1 〇bserved_AC is converted to the first observed inflammation angle 01〇bserved AC. For example, the first observed pixel length PI Observed_AC on the first mirror image capturing unit 22', the pixel starting position pi Observed_AC_S, P1 〇bserved_AC_E can be converted into the flaming angle 01 Obsen^AC-S by using the preset angle array correspondingly 01 〇b_ed AC E, and the difference between the angles 01 ^ and wje is the first observation angle 01〇bserved Ac 0 to generate a first coverage ratio P1_AC according to the degree of coverage of the first observation angle μ 13 201207702 in the first expected angle 0lExpected_AC To obtain the probability that the touch input points 01, 02 are located in the candidate area AC. Corresponding to the first expected angle of the candidate area AC θ 1 The first observation angle 01 in the Expected_AC 01 〇bseryed AC The first coverage ratio p 1 AC can be calculated by the following formula:

After P1_AC - 01Observed AC / 0iExpected AC, the first expected angle and the first observation angle of the remaining candidate regions are respectively calculated in the same way, as the candidate regions BD, BC, and the first expected angle of the gossip WEXpected_BD, 01ExpeCted_BC and 01Expected AD, and the first observation angle _BD, Θ1 0bserved BC, and 01 〇bserved AD. Calculating the extent of the first observation angle included in the first-expected refresh angle of each candidate area BD, BC, and AD, to generate ratios P1-BD, P1-Bc of the touch input points of each candidate area BD, BC, and AD Ρι. For example, the first coverage ratio ρι_Β〇 = (10) / 01 - BD of the corresponding candidate area BD. Specifically, 'P1_AC, P1_BD, P1_BC, and P1-AD are greater - the coverage _ is larger), and the probability that the candidate area is the location where the touch input point is located is larger. It is worth noting that in this implementation, the ratio is the first-expected angle of the first nucleus angle of the angle _ 'others such as: the first - _ image degree and the first - observation image 辛 length = = = and the side area to be gamma The geometric relationship ratio of the lang image in the m domain, for the above purpose - additionally 'the invention uses two touch input points 01 ::= input:: control input - can also use the $ - mirror camera unit in another implementation of the invention In the example, step 508 201207702 22' and the second mirror image capturing unit 24 are used to calculate the coverage ratio of a candidate region. Please refer to FIG. 7. FIG. 7 is a schematic diagram for explaining the ratio of the image captured by the first and second mirror image capturing units in one candidate region in FIG. The manner in which the first coverage ratio pi_AC of the candidate region AC is generated by the first mirror image capturing unit 22' is similar to that of FIG. 5, and will not be described herein. With the second mirror image pickup unit %, the second coverage of the candidate area AC is generated as follows. The principle of the second coverage unit AC is similar to the manner in which the first image pickup unit 22' is used to generate the first coverage ratio Ac of the candidate area AC. According to the position of the second mirror image capturing unit 24' and the two end points of the candidate region ^, using a trigonometric function such as arctangent to generate a second expected angle and its starting angular position 'reuse angle array (angletable) can obtain a first The expected pixel length p2 Expected_AC and its starting pixel position; in a preferred embodiment, the two end points of the candidate region are the same as the second expected end angle of the candidate region AC which is the second expected angle. X2, y2) and (X4, y4). Next, the second image capturing unit 24 observes whether the touch input point image is generated in the range of the second expected pixel length P2 Expected_AC. In this embodiment, the second observed pixel length P2 〇bs(4)d a array can be expected. Prime New Zealand P2qw_ view. The second coverage ratio p2-Ac is generated based on the degree to which the second expected angle ac in the second observation angle ac of the Observ ton AC is calculated. The second coverage ratio p2—AC can be calculated by the following formula:

P2_AC = 02〇bservedAC / 02Expected_AC After obtaining the first and second coverage ratios P1_AC and p2_AC, the distance between the candidate region AC and the first and second mirror imaging units 22, 24, respectively, can be calculated according to the distance m, D2 201207702. The first coverage ratio P1_AC has a weight W1 and a second coverage ratio pi-ac has a weight W2. The weights wi and W2 can be calculated by the following formula: wi = D1 / (Dl + D2) W2 = D2 / (D1 + D2) According to the first and second coverage ratios pl-AC, P2_AC and the corresponding weight W2, can be generated The candidate area ACi overall coverage ratio p is as follows:

After P = Wl * P1_AC + W2 * P2_AC, the (4) coverage ratios of the remaining candidate domains are calculated separately. When each candidate region has a coverage ratio (such as the first coverage ratio or the overall coverage example), the candidate region can be used as a candidate region to determine the candidate for the corresponding correspondence. region. For example, in the step training, the minimum coverage _ read ship field can be directly deleted, and the candidate field with the remaining ratio of the shirt cover is taken as the position of the touch input point. However, there are still false positives in the candidate area of the coverage ratio. Therefore, step _ can == the certificate procedure to improve the resistance of the sugar input test. In another embodiment of the present invention, in the step 51, when the candidate regions corresponding to the plurality of touch inputs are determined, the authentication is included. In the following: In addition to the NAND _ money area _, the broken package 3 constitutes the whole健轻红录_,.料盖关面_Selected area 201207702 The other continuation of the other waiting ship domain still contains the image interval that constitutes all (4) areas, then it is determined that the coverage _ minimum waiting area and vehicle control input The location of the point can be deleted. Please refer to FIG. 8. FIG. 8 is a schematic diagram for explaining the consistency verification by using the image sections corresponding to the first camera unit 22 and the second camera unit 24. As shown in Figure 8, the actual touch points are located in AC and BD. The candidate areas Ac, ribs, BC, and AD are calculated by the above formula to have 85%, 65%, 1%, and the coverage ratio of the state, and the candidate area AC, The combination factors of BD, BC, and AD are the first image interval A, B and the second image interval C, D. For example, the union factor of the candidate region AC includes the first image interval A and the second image interval c, and the union factor of the candidate region rib includes the first image interval B and the second image interval d, and the candidate region bc is combined. The gj sub-image includes the first scene and the second image interval c, and the candidate region ad includes a first image interval A and a second image interval D. Since the candidate area AD has the lowest coverage ratio, that is, the probability that the candidate area AD is a touch input point is small, the deletion candidate area ad is a possible location of the touch input point. When the candidate region AD is deleted, the union factors of the remaining candidate regions AC, BD, and BC include the first image interval A, B and the second image interval C, D, so that the candidate region AD is not the position of the touch input point, The candidate area AD can be deleted. Among the remaining unverified candidate areas AC, BD, BC, the candidate area BC has the lowest coverage ratio. When the candidate region BC is deleted, the union factors of the remaining candidate regions AC and BD include the first image interval A, B and the second image interval C, D, so that the candidate region BC is determined and the position of the input point is controlled, so The candidate area BC is deleted. Among the remaining unverified candidate regions ac, bd, the candidate region BD • has the lowest coverage ratio. When the candidate region BD is deleted, the co-collection factors of the remaining candidate regions are only including the first image interval A and the second image interval c, and are not included in the 2012-07702 constituting all the simple d-domains - the inter-images A, B and The second image is lang c, d, so the candidate area _D is determined to be the position of the touch input point, so it cannot be deleted. Therefore, the remaining candidate areas AC and BD that have not been deleted are determined to be the positions of the touch input eight points. However, it is still possible to make a mistake in the position of the blessing only by performing the consistency verification of the _th-those element 22 and the second unit 24. Please refer to Figure 9, which is the intention of the =========================================================== The complex side control input points are actually located in the candidate area Μ, rib, BC, respectively, and the candidate areas AC, BD, BC and AD respectively have _, 、, 81%, 40% coverage ratio. The candidate regions AC, BD, bc and the associated factors are the first image interval A, B and the second image interval C, D. Because the candidate area has the lowest coverage ratio. When the candidate region AD is deleted, the co-collection factors of the remaining candidate regions Μ, ribs, and BC include the first image regions A and B and the second image regions C and D′ of all the candidate regions, so that the candidate region AD is not the touch input point. The position of the candidate area AD can be deleted. Among the remaining unverified candidate regions Ac, bd, bc, the candidate region AC has the lowest coverage ratio. When the candidate region ac is deleted, the union factors of the remaining candidate regions BD and BC include only the first image interval 6 and the second image interval C and D. Therefore, the candidate region AC is determined to be the position of the touch input point, so no=delete Therefore, the AC will be retained. In the remaining unverified candidate area, the candidate is 3 彳. When 纟==BC, the union factors of the remaining candidate regions AC and BD include the first image interval A, B and the second image interval C, D′, so that the candidate region BC is determined as the location of the touch input point, so the deletion can be deleted. Candidate area BC. After deleting the candidate region Bc, the remaining unauthenticated time 18 201207702 candidate bar domain AC, BD 'if the candidate region BD is deleted, the remaining unremoved domain AC's union factor only includes the first image interval eight and the second image The candidate region BD cannot be deleted in the interval. Therefore, the unremoved candidate area AC, rib P, 疋 is the position of the touch wheel person point ′ is not in accordance with the setting conditions of the touch input point 候, BD, BC. The reason is that the actual touch wheel entry points are respectively separated from the BD and the BD overlaps. Therefore, if only the first camera unit Μ and the second camera unit 进 are used for the lamp-induced verification, it is possible to misplace the position of the person. Therefore, in another embodiment of the present invention, the consistency check of step 51 is performed by using the first camera unit 22 and the second camera unit 24, and the first mirror image unit 22 facing the implant in the straight mirror. And the second mirror camera unit % for consistency verification. Referring to FIG. 10, FIG. 10 is a diagram illustrating the use of the first camera unit 22, the second camera unit 24, the [mirror image unit 22, and the second mirror unit 24 to perform verification of each candidate region. schematic diagram. As shown in the figure (4), the image is captured by the first image capturing unit 22'', that is, the first image capturing unit Μ is transmitted through the mirror surface 26, and the image includes a plurality of third image intervals 匕F, G; The second mirror image capturing unit 24, 'that is, the second camera unit 22 passes through the mirror surface 26 to paste an image into the indication area, the image including a plurality of fourth image sections I small K. Each candidate region is one of the first image interval a, B, the second image interval C, D, and one of the third image interval E, F, G and the fourth image interval I, J, K One of the unions is produced. For example, the candidate region of the candidate region includes the first image interval A, the second image interval c, the third image, and the fourth image interval I; the candidate region of the candidate region includes the first image interval 19 201207702 B The second image interval C, the third image interval F, and the fourth image interval, and the like, and the like. That is, the association factors of the candidate regions Acm, BCFJ, bdGK, and ADGI are the first image interval A, B, the second image interval c, D, the third image interval E, F, G, and the fourth image interval j, j, Κβ assumes that the candidate regions ACm, BCFJ, BDGK, and ADGI have coverage ratios of 80%, 81%, 82%, and 4%, respectively, and the touch input points are actually located in the candidate regions ACEI, Bcfj, and BDGK, respectively. Since the candidate area ADGI has the lowest coverage ratio, the deletion candidate area ADGI is the location where the touch input point may be located. When the candidate region adgi is deleted, the union factors of the remaining candidate regions ACEI, BCFJ, and BDGK include all the first image intervals A, B, the second image interval C, D, the third image interval e, f, g, and the fourth image. The interval I, ], K, therefore, determines that the candidate domain adGI is not the position of the touch input point, so the candidate region adgi can be deleted. The remaining unverified candidate regions ACEI, CTJ, BDGK candidate region i or ACEI have the lowest coverage ratio. When the candidate region ACEI is deleted, the union factors of the remaining candidate regions BCFJ and BDGK include only the first image interval B, the second image interval C, D, the third image interval F, G, and the fourth image interval j, κ, It is determined that the candidate area ACEI is the position of the touch input point, and therefore cannot be deleted. Among the remaining unverified candidate regions BCFJ, BDGK, the candidate region bcfj has the lowest coverage ratio. When the candidate region BCFJ is deleted, the remaining candidate regions Am and BDGK include only the first image interval A, B, the second image interval c, D, the third image interval E, G, and the fourth image interval! κ, so the candidate area bcfj 201207702 is the location of the touch input point, so it cannot be deleted. In the remaining unverified candidate region BDGK, if the candidate region bdgk is deleted, the remaining undeleted community domain ACEI, BCF; the difficult time view - and the image interval A, B, the second image interval C, the third image interval E, F and the fourth image area H, the candidate area BDGK cannot be deleted. Therefore, the undeleted candidate areas ACEI, BCFJ, and BDGK are determined as the positions of the touch input points, and the touch input points are respectively set in the candidate areas ACEI, BCFJ, and BDGK. It is worth noting that (4) the figure can also be taken as the first (four) 2 - camera unit 22 and the second camera unit μ, and one of the first mirror unit 22' and the second mirror unit 24' at its mirror symmetrical position. Perform consistency verification, the verification method is the same as above, no longer praise. - Please refer to Fig. 11, $ u _ is the _ _ mirror image camera 7L 22' or the second mirror image unit M of the present invention, and the method of determining the indication area of the optical touch glory 2 plus the actual __ position u Flow chart. The optical touch recording 2 shown in the diagram of FIG. u is detailed as follows: ', 曰 step remuneration. Using the first camera unit 22 to capture an image to the indication area 2 to generate a first real image II Step gift: The imaging unit 24 takes an image to the indication area (4) to generate a first-point image 12; step blue. According to the first-real image 11 and the second real image 12, a plurality of candidate regions are generated; 201207702 The procedure should be: using the first-mirror camera unit 22, or the second mirror image unit Μ, to the «彡«-virtual point image (1) virtual point image G1, the first virtual point image G1 or the second virtual point image G2 each containing a plurality a cross-touch input point and a virtual touch input point. Step: According to a plurality of candidate regions + at least - region generation - a touch distribution input point possible distribution area; Step 1110: According to the touch input point, the possible distribution area corresponds to the first The mirror 22, or the second mirror image capturing unit 24, generates a -first reconstructed image illusion or a second reconstructed image R2; Step 1112: the first real image II and the first reconstructed image phantom generate a first virtual point reconstructed image RH Or the second real image 12 and Reconstruct the image to generate a second virtual point to reconstruct the image as shown in Fig. 2; Step m4: Compare the similarity between the first virtual point image G1 and the first virtual point reconstructed image' or compare the second virtual point image G2 with the second virtual point reconstruction The similarity of the image milk is used to determine whether the possible distribution area of the touch input point corresponds to a touch input point. " In step 1108, the possible distribution area of the touch input point may be determined according to the first and/or second real image. The number of possible distribution areas of the touch input point is generated according to the number of touch input points of the first real image and the number of touch input point images of the second real image. Refer to Figure I2. Figure I2 is a schematic diagram illustrating the possible distribution of touch input points. As shown in FIG. 12, when the number of touch wheel human rotation images included in the first real image u and/or the second real image 12 is 2, the number of control persons can be judged as 2 or 22 201207702 3. As shown in case 12 of FIG. 12, when the number of touch input points is 2, the number of possible touch distribution points of the touch input point is 2, that is, the object to be tested may be located in the candidate area AC and BD or candidate areas BC and AD. . More specifically, when the number of touch input points is 2, the touch distribution points may be the candidate regions ac and bc, the candidate regions BC and BD, the candidate regions BD and AD, and the candidate regions may be ac, candidates. The area AC and the BD or the candidate areas BC and AD are combined. However, since the touch input point is located in the Wei domain (4), the first image area A, B of the touch point image on the first real point f image, and the touch input point image on the second real point image The second image interval C, D, therefore, the 'touch input point possible distribution area is the candidate area ac and the BD or the candidate areas BC and AD. The other candidate regions do not correspond to all of the first image segments A and B and the second image regions c and D. For example, if the touch input points may be the candidate regions BC and BD, there is no corresponding first image interval. A. It should be noted that when the number of touch input point images included in the first real image n and/or the second real image 12 is 2 (Fig. 12), the number of touch input points is a magic call or 3 ( Case2) 'Therefore' the system will calculate the similarity between the virtual point image and the virtual point reconstructed image in casel and case2 (calculated in detail later) to determine the actual number of touch points. If the number of actual touch points is to be accurately determined to generate a possible distribution area of the touch input points to reduce the amount of system calculation, the first-mirror image capturing unit 22 can be utilized by the first virtual image (1) and the second virtual image G2. And the second image capturing unit % is generated by capturing the image of the hao j, and the first virtual image 〇 1 and the second virtual image 〇 2 each comprise a plurality of actual touch input points and a virtual touch input. point. Therefore, in the embodiment of the present invention, in the embodiment of the present invention, when the number of possible distribution areas of the touch input point is determined by the first and/or second real point images, the first virtual point image (7) may be simultaneously used. Or the second virtual point image G2 to more accurately determine the number of possible division areas of the touch input point. Taking the first virtual point image G1 as an example, when the number of touch input points is 3, the first virtual point image contains 5 touch input images; and the t 3 touch input image is the actual touch input point. (3 points) mirroring, and the remaining 2 touch input point images correspond to the touch input of the first real image, image (2 points). According to the difference between the number of touch input point images and the first real point image U of the first virtual point image (1), the number of possible distribution areas of the touch input point can be determined, for example, the touch input point of the first virtual point image 〇1 The difference between the number of images and the φ-point image II is 3 (5 _ 2 = 3), so the number of possible touch input points is 3.

After determining that the touch loss may be divided into ships, in step _, a reconstructed scene is generated as in the first-mirror camera unit 22 or the second mirror camera unit 24 to correspond to the first-virtual image (1) or The virtual point in the second virtual point image (5) is pure point. In view of the above, the touch input points may be distributed in the candidate regions ac and B select regions BC and AD. Taking the candidate region AC_ as an example, according to the coordinates of the four endpoints of the candidate region and each of the candidate regions, the radius and the center coordinate of the inscribed circle in the candidate region are generated, and (4) the circle is in the simulated finger corresponding candidate region. But hiding inside the paste is just - miscellaneous, the village can _ other materials. Please refer to the ηth diagram, which is a schematic diagram illustrating the candidate region from the inside: the circle. The center of the candidate region AC inscribed circle Cr is the center point (xe'ye) of the candidate region. Figure 4 and its related descriptions have already explained the way it is calculated. ^ 8 24 201207702 = in the description 'but should pay attention to the center point (4) (10) It may be generated in other ways, for example: The radius of two Φ°α can be calculated by the following formula: R = (dl+d2 + d3 + d4)/4 where cU,, and private are respectively the candidate region ^4 The edge extends vertically to the distance of the center point (xc, yc) of the candidate area AC. Thus, in the candidate region ac; the heart point (XC, yC) is centered with a half-turn, and the inscribed circle Cr of the candidate region AC is obtained: February: the circumference of the inner circle of the candidate region Ac may not be Will be fully compliant with the edge of the AC area AC. Obtaining the inscribed circle & of the candidate region Ac, the calculated inscribed circle Cr can be projected on the first mirror image unit 22 or the second mirror image unit %, that is, the first mirror image unit 22, or Two mirror image unit % of the touch input point image position. Please refer to the second drawing, which is a schematic diagram illustrating the pixel position of the first-mirror imaging unit 22 corresponding to the inscribed circle Cr of the calculation candidate region AC. As shown in Fig. 14, the first mirror image unit 22 is connected in a straight line, and the center point of the inner circle Cr of the candidate area Ac is connected. The center point of the inscribed circle Cr is perpendicular to the straight line [the direction in which the direction extends to the half R is the tangent point position Cr_pl, Cr_p2 of the inscribed circle Cr. According to the position of the first mirror image capturing unit 22' and the tangent point position Cr_pl, the angle 0Cr_AC_start can be obtained through the trigonometric operation; and the angle of the first mirror image capturing unit 22' and the tangent point position Cr_p2' can be obtained via the two corners. . According to the difference between the declination 0Cr Acca and 0Cr_AC_end, the tangent angle 0cr AC of the candidate region AC can be generated. The angular angle 0Cr AC start and 6>Cr_AC_end are obtained through the angle matrix • the pixel starting position Pei__Ae_start, p on the first mirror camera 201207702 l. And (5), that is, the position of the touch input point image of the mirror image capturing unit 22'.

Repeat the above steps to calculate the candidate area, that is, the refresh angle & BD__, ^ W through the angle array (angle _e) can be obtained corresponding to the pixel start position on the sensor

Cr_BD_start ' Pcr_BD_end generates the first-f construction image IU. In the same way, repeating the steps of the remaining regions of the test input points in the 13th and 14th steps, the remaining touch input points may be distributed. • AC end PCr_BD_start, PCr_BD_end. Therefore, when the touch input point may distribute the area AC and BD, according to ρ^_, ρ(> ' '

The calculation candidate _ AC _ ® corresponds to the second mirror image unit 24, and the pixel position is in the manner of the first mirror image element 22. For example, in the second diagram, the second mirror image unit 24 may be connected by a straight line L, and the center point of the inscribed circle Cr of the candidate region Ac is _Cr center point is perpendicular to the straight line [the direction of each extending radius R The position is the tangent point of the inscribed circle Cr. The position of the second mirror camera unit 24' and the position of the tangent point are known, and the angle start position is obtained by trigonometry. A corresponding angle to the pixel starting position on the sensor can be obtained through an angle table. The second reconstructed image R2 is generated according to the inscribed circle of the candidate regions AC and BD corresponding to the pixel starting position on the second mirror image capturing unit %. In step 1112, the first reconstructed image of the first real-point image π and the possible touch distribution area (for example, the candidate region AC and the BD or the candidate regions BC and AD) is respectively added. 26 201207702 Adding R1 may generate a pair The image RI1 should be reconstructed from the first virtual point of one of the possible distribution areas of the touch input point, as shown in FIG. Similarly, adding the second real image port to the second reconstructed image R2 of the possible touch distribution area (for example, the candidate area AC and the BD or the candidate areas bc and AD) may generate a corresponding touch input point. The second virtual point of one of the distribution regions reconstructs the image R22. In step 1114, comparing the similarity between the first virtual point image G1 and the first virtual point reconstructed image to determine whether the touch input point corresponding to the first virtual point reconstructed image may be corresponding to the knife cloth area A touch input point. Comparing the similarity between the first virtual point image Ο and the first virtual point reconstructed image RI1 is compared with the first virtual point image (1) and the first virtual point reconstructed image RI1 at the corresponding pixel position of the first mirror unit For the degree of overlap, refer to FIG. 5, and FIG. 15 is a schematic diagram for comparing the similarity between the first virtual point image (7) and the first virtual point reconstructed image RI1. The degree of similarity S1 between the first virtual point image (1) and the first virtual point reconstructed image RI1 can be calculated by the following formula: SI = 〇vl / (〇vl + N1) ', the middle 〇 Vl is the first virtual point image G1 and the first A virtual point reconstruction image RI1 overlap knife, N1 is the first virtual point image (31 and the first virtual point reconstructed image 圯丨 non-overlapping part. As shown in Fig. 15 'the first virtual point image G1 in the first-mirror image In the unit 22, the pixel positions on the pixel are the pixels 5 to 11, the pixels 15 to 19, the pixels 21 to 25, and the pixels 31 to 34, and the pixel position of the first-virtual image reconstructed image RI1 on the first-mirror imaging unit is the pixel 6 : 10, pixels 13 to 17, pixels 21 to 23, and pixels 28 to 32. The overlapping portion 〇ν1 of the first virtual point image and the first virtual point reconstructed image RH is (4 + 2 + 2+ 〇 = 9, and the first 27 201207702 The virtual point image G1 and the first-virtual point reconstruction image RI1 non-overlapping part N1 is (1 + 1+2+· 2 + 2 + 3+ 2)== 13, so the degree of similarity SI = 9/(9+13 )==9/22. In this way, the degree of similarity between the imaginary-dot reconstructed image of all possible touch input points and the first virtual point image G1 can be calculated. Compared with the first-virtual image G1 The candidate area corresponding to the possible distribution area of the high touch input point is determined as the position of the touch input point. In another embodiment of the present invention, the first virtual point image G1 and the first virtual point reconstructed image RI1 do not overlap. Similarly, the step 1114 may also compare only the second virtual point image G2 and the second virtual point re-construction image RI2 ' to determine the possible distribution of the touch input points corresponding to the second virtual point reconstruction image fertilizer. Whether the area corresponds to a touch input point. Comparing the similarity between the second virtual point image (7) and the first virtual point reconstructed image RI2 is compared with the second virtual point image G2 and the second virtual point reconstructed image RI2 in the corresponding second image The degree of overlap of the pixel positions on the camera unit. The second virtual point image G2 and the second virtual point reconstructed image are similar to the production process.

Calculated by the following formula: X S2 = Ov2 / (〇v2 + N2) where (10) is the second virtual point image G2 and the second virtual point reconstructed image milk Panxian

(4) The mr is different from the younger and the second point of the distribution area may be reconstructed. The candidate area of the first virtual point image G2 similarity is the similarity of the touch input illusion 2 and the first imaginary point image G2. Also _

28 201207702 The present invention can also utilize the first virtual point image G1 to be similar to the degree S b and the second virtual point image g2 and the ^^^ image, such as: the like button, the succinct fine is dependent on __ 2: Ttr. A difficult point to lose can be _ regional details like the financial = the degree of similarity of the point of possible distribution area S1 and S2 calculated. - The overall similarity S of the riding energy distribution area can be calculated by the following formula and the p touch input point can be S = (Sl + S2)/2 pass ' • by 1 compared to the total possible distribution area of each touch input point Similarity degree S, similarity path == candidate area corresponding to the possible distribution area of the control input point: In summary, one embodiment of the method of the present invention generates a plurality of images by using the first camera unit and the second camera image captured by the second camera The candidate regions are arbitrarily obtained by using the first-mirror image capturing unit located at the mirroring position of the first camera unit, and the second-stage mirroring material located at the mirroring position of the second image capturing unit. As covered, the example determines the probability that the touch input point is located in each candidate area. The larger the coverage ratio of the image to be detected by the first-mirror image capturing unit and/or the second mirror image capturing unit, the greater the probability that the candidate region is the location where the touch input point is located. In the embodiment, the image captured by the first camera unit and the second camera unit is used to generate a touch distribution point 4, and each touch point can calculate a corresponding I, which is a reconstructed shirt image. Each touch input point may be distributed in the area of the point-and-reconstruction shirt image and the first-mirror camera unit/second mirror image unit. The result is 29 201207702. The touch input point with higher similarity may be divided into ships. Determine the location of the touch input point. Therefore, the method provided by the present invention can determine the position of the optical touch static actually being multi-touched, and solve the problem that the virtual optical touch technology causes the virtual touch point in the multi-touch situation. The above is only the preferred embodiment of the present invention, and all modifications made to the scope of the present invention are within the scope of the present invention. [Simple description of the figure] Fig. 1 is a schematic diagram showing the virtual touch point formed by the blocking of multiple optical paths in the case of multi-touch in the case of multi-touch. Figure 2 is a schematic illustration of an embodiment of an optical touch screen of the present invention. Fig. 3 is a schematic view showing an embodiment of the optical module of the optical touch screen of Fig. 2 as a retroreflector. Fig. 4 is a schematic diagram showing that the processing of Fig. 2 is based on the preset angle _ the first camera unit = the touch input county image and the second camera unit _ input point image are respectively converted into angles. Figure 5 is a flow chart of the method for determining the position of the actual touched position of the touch screen by Ronben (4). Fig. 6 is a view for explaining the ratio of the image of the candidate region captured by the first-mirror camera unit in the calculation of Fig. 2; Figure 7 is a diagram for calculating the ratio of the candidate regions captured by the images taken by the first and second mirror images as early as in Fig. 2. 201207702 Fig. 8 is a schematic diagram for explaining the consistency verification using the image sections corresponding to the first camera unit and the second camera unit. Fig. 9 is a view for explaining the case where the second image pickup unit is used to perform the coincidence verification erroneous determination using only the first image pickup unit. First, a schematic diagram for verifying the consistency of each candidate region by the first imaging unit, the second imaging unit, the first-mirror imaging unit 7L, and the second mirror imaging unit will be described. Lu. 11 is a flow chart for explaining the method for determining the position where the indication area of the optical touch screen is actually touched by the first mirror unit or the second mirror unit. Figure 12 is a schematic diagram illustrating a possible distribution area of a touch input point. Figure 13 is a diagram illustrating the generation of an inscribed circle in a candidate region. The figure is a schematic diagram illustrating that the inscribed circle of the candidate region corresponds to the pixel position of the first image capturing unit. Figure I5 is a schematic diagram showing the similarity between the first virtual point image and the first virtual point reconstructed image. [Main component symbol description] Light source Realized touch point Virtual touch point Optical touch screen LG, LG1, LG2 ΟΡ1, ΟΡ2 GP1, GP2 2

31

Pa, Pb, Pc, Pd RR 0a, 0b, 0c, θ < 3, 0a_s, 0a_e, Observed AC S, Θ1 201207702 20 22 24 26 27 28 202 204 206 208 Cl C2 20, 22, 24, 01'02 ( A) (B) indication area first camera unit second camera unit mirror illumination module processing unit left edge lower edge right edge upper edge upper left corner upper right corner mirror image no area first mirror camera unit second mirror camera unit touch Control input point bird map cross-section touch input point image retroreflector angle

32 8 201207702

Observed AC E, θ〇_AC_start, 0Cr_AC_end A, BC, DE, F, GI small KAC, BD, BC, AD, ACEI, BCFJ, BDGK, ADGI Pa_S, Pa_e, PI Expected_AC_S, PI Expected_AC-E, PI Observed_AC_S, PI Observed_AC_E, PCr_AC_start 'Pcr_AC_end, Pcr_BD_start, Pcr_BD_end (xc, yc) 5, 11 500, 502, 504, 506, 508, 510, 1100, 1102, 1104, 1106, 1108, 1110, 1112, 1114 PI Expected_AC PI Observed AC first image interval second image interval third image interval fourth image interval candidate region pixel start position center point method step candidate region AC first expected pixel length candidate region AC first observation image 33 201207702 prime length

θ 1 Expected_AC θ 1 〇bserved_AC P2 Expected_AC Θ 2 Expected_AC Θ 2 〇bserved_AC

(xl,yl), (x2, y2), (x3, y3), (x4, y4), (x2, y2), (x4, y4) P1_AC

θ 1 Expected_BD θ 1 Expected_BC θ 1 Expected_AD

The second expected angle candidate region AC of the first expected angle candidate region AC of the first expected angle candidate region AC of the PI BD candidate region AC is the second expected angle candidate region AC of the second observation angle candidate region AC The first coverage ratio of the first expected angle candidate area BD of the first expected angle candidate area AD of the first expected angle candidate area BC of the ratio candidate area BD is greater than the second coverage ratio of the 201207702 example P2AC candidate area AC W1 > W2 Weight D1 > D2 Distance easel, case2 Case P Overall coverage ratio G1 First virtual point image G2 Second virtual point image R1 First reconstructed image R2 Second reconstructed image RI1 First virtual point reconstructed image RI2 Second virtual point reconstructed image Cr inscribed circle R radius L line dl, d2, d3, d4 distance Cr_pl, Cr_p2 tangent point position ^Cr_AC tangential angle of candidate area AC ^Cr_BD tangential angle of candidate area BD ^Cr_BC tangential angle θ of candidate area BC · The tangent angle of AD candidate area AD 35 201207702 SI, S2, S Ovl, Ov2 N1 > N2 similarity overlap part of non Overlapping part

Claims (1)

201207702 VII. Patent application scope: 1. - The method of judging the plural _ controlling the input 阙 光 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ a unit that captures an image from the indication area; a light-emitting module for introducing light into the area of the 5th finger and then being measured by the first and second camera units; and - the mirror surface relative to the first and the second The second camera unit is configured to: φ use the first camera unit to capture image generation from the indication area - the first real point uses the second camera unit to generate a second real point image to the indicator area image, wherein The first real image and the second real image correspond to the region to generate a plurality of candidate regions; and the plurality of candidate regions are captured in the region to be detected through the mirror Point image generation 2. According to the captured image feature, it is determined whether the area to be detected corresponds to a number of touch input points. " As in the method described in claim 1, the input control point of the towel generates a plurality of image-image intervals, and the number of touch input points generated by the Hendy=_the number of touch inputs generates a plurality of second images called each image. In the interval - and the second of the plurality of second images _ are generated, and the plurality of candidate regions are based on the set of touch probability, the method further comprises: w W image feature generation complex number 37 201207702 Picking a touch The deletion method is performed in the candidate region with the lowest probability, wherein the deletion method includes: determining whether the plurality of difficult factors of the candidate regions other than the candidate region having the lowest touch probability include the plurality of first image regions and the plurality of first images The interval, if yes, the non-corresponding touch input point of the candidate area with the lowest touch probability will be deleted. 3. The method of claim 1, wherein the first real-point image generates a plurality of first-image intervals according to the plurality of touch input points, and the second real-point image is generated according to the plurality of touch input points a plurality of second image intervals, and the plurality of candidate regions generate a plurality of touch chances according to the corresponding captured image features, the method further comprising: using the far-camera unit to capture image generation through the mirror toward the indication region - a virtual point image having a plurality of third image intervals, wherein each candidate region is formed by a plurality of first image interval t-, one of a plurality of second image intervals, and a plurality of third image intervals The set-selection-the candidate region with the lowest touch probability is deleted, wherein the deletion method includes: determining whether the plurality of difficult factors other than the candidate region having the lowest probability of the simple control include the plurality of the first and the The second and third image sections are 'right', and the candidate area with the lowest touch probability is not corresponding to the touch input point. 4. The method of claim i, wherein the first camera unit and the second camera are disposed outside the outer left and upper right corners of the upper left corner of the indication area, the hair is issued, and the package is 201207702 An upper illumination module is disposed on the indication area, and the second side illumination module and the second side illumination module are disposed on the left edge and the right edge of the indication area; the lower illumination module is disposed on the a lower edge of the indication area, wherein the mirror is disposed at a lower edge of the indication area, wherein the first real image is generated by using the first camera unit and the virtual image includes: enabling the first camera unit; When the first camera unit is turned on, the lower light emitting module and the second side light emitting module are turned on and the first image capturing unit is used to capture the first real image, wherein the light module and the fifth layer are The side light-emitting module is turned on in the different time period and when the first camera unit is enabled, the upper light-emitting module and the second-side light-emitting module are turned on, and the first-camera unit is transparent to the mirror surface. a three image according to the first real image and the third image To the virtual image point, wherein the hair ^^ module and the second side of the light-emitting module based on different turn on period. The method of claim 4, wherein the generating the second real image by using the second camera unit comprises: enabling the second camera unit; and enabling the second camera unit to enable the second camera unit The illuminating module and the first illuminating module are used to capture the second real image, wherein the s illuminating module and the first illuminating module are turned on in different time periods. • 6. As requested in the item 丨 green, the towel through the fiber _ _ _ _ domain dig 39 201207702 touch input point lin, and the root of the image __ contiguous corresponding to multiple touch wheel The entry point is - the package VIII ^ ^ 产生 according to the _ area and the first - camera Cuiyuan 'two position to generate an expected angle; in the detection area using the first camera unit through the mirror Touch=雠卜崎肖; __(4) and the observation angle produces the captured image feature. The method of claim 1, wherein the touch wheel wheel is touched by the touch wheel person point ~ f, and the image side feature is actually corresponding to the plurality of touch input points - including Detecting whether or not to generate an expected pixel image area according to the symmetrical position of the to-be-detected area and the first camera unit; in the ^===using the first camera unit to perform touch through the mirror Input the shirt image to generate - observe the pixel image area. And according to the silk image (4) touch the image, the fine area is private, the picking area is operated, the mixed image is mixed into the image, and the mirror-symmetric position of the unit is generated. Corresponding to the number of suspects on the side of the singularity - including μ ', " ° ° ° 疋 根据 according to the area to be detected and the first expected first angle of the first camera; 8. 201207702 face symmetrical position generated according to the a second expected angle of the detection area and the mirror of the second camera unit; using the first broadcast in the area to be tested to generate a first observation through the mirror to obtain a touch input point image Angle; in the area to be detected In the domain, the second camera is used to capture a touch input point image through the mirror to generate a second observation angle, and according to the first-difficulty, the first___ is available - the first ratio - the expected An angle between the included angle and the second observation is obtained - a second ratio; a first virtual distance between the to-be-image region and a mirror-symmetric position of the first camera unit and a mirror-symmetric position of the candidate object and the second camera unit a second virtual distance, generating a weight corresponding to the first ratio of the hashed object and a weight of the second ratio; and generating the 根据 according to the first ratio, the second ratio, the weight of the first ratio, and the weight of the second ratio Take image features. 9, the method of the touch screen of the optical touch screen is actually the position of the touched area of the optical touch screen, the optical touch screen includes a __ camera unit and a first camera unit, the indication is directed to The area is operated by the image; a light emitting module is configured to introduce light into the indication area and then sensed by the first and second camera units; and a mirror surface is disposed relative to the first and second camera units, the method comprising : (a) using the first camera unit to take a picture to the indication area to take an image-produced-first-real image; () Λ first camera early through the mirror facing the indication area to manipulate the image production 201207702 Point image; (6) using the second camera unit to capture an image from the indication area to generate a second real image, wherein the 3 first image and the second image correspond to the region to generate a plurality of candidate regions; (9) according to the plurality of candidates At least the region in the ship domain - the real point may be distributed; (e) according to the real distribution of the real point corresponding to the mirror surface to generate a first reconstructed image 'violation - real image and the first reconstructed image generated The first tentative point to reconstruct the image; and _ (f) The 4 - of a virtual image point f San _ - of the following may be solid dots dotted distribution area should be large reconstructed image is a plurality of at least one override input point. 10. The method of claim 9, wherein in step (d), the real point possible distribution area is further determined based on the 5th first point image or the second real point image. 11. The method of claim 9 wherein step (d), the real point possible distribution area is further determined based on the first real point image and the first virtual point image. The method of claim 9, wherein the first camera unit and the second camera unit are disposed outside the upper left corner and the upper right corner of the upper left corner of the indication area, and the light emitting module comprises: an upper light module The first light emitting module and the second side light emitting module are disposed on the right edge and the left edge of the indication area; the lower light emitting module is disposed in the indicating area a lower edge, and the mirror is disposed at a lower edge of the indication area, wherein the first camera unit is used to generate the first real shirt image and the 0 first virtual point image includes: enabling the first camera a unit; when the first camera unit is enabled, the lower light emitting module and the first side light emitting module are turned on and the first image unit is used by the first camera unit, wherein the lower light module When the first camera unit is enabled, the upper light emitting module and the first side light emitting module are turned on, and the first camera unit is used to capture the first a virtual image, wherein the upper illumination module and the first side Open period based on different modules. The method of claim 9, wherein the first camera unit and the second camera unit are disposed outside the upper left corner and the upper right corner of the upper left corner of the indication area, and the light emitting module comprises: an upper light emitting module The first light emitting module and the second side light emitting module are disposed on the right edge and the left edge of the indication area; the lower light emitting module is disposed in the indicating area a lower edge, and the mirror is disposed at a lower edge of the 豸 indication 11 field, wherein the generating the second real image by using the second camera unit comprises: enabling the second camera unit; and enabling the second camera unit Turning on the lower light emitting module and the second side light emitting module, and using the second image capturing unit to capture the second real point image, wherein the lower light emitting module and the second side light emitting module are tied to each other Open at different times. The method of claim 9, wherein the at least one of the plurality of candidate regions generates a real-point possible distribution region according to the region: the number of real points according to the first image, and (3) the number of possible distribution regions; The number of real points of the shirt image produces a real point coffee and the actual point product. The production and cutting of a plurality of real points may be distributed. 15. The method of claim 10, wherein the shot (e) comprises a == point: each region in the energy distribution region produces a substantial inscribed circle; and a tangent angle is obtained according to the ^-na unit_butter__; and A first ghost image is generated corresponding to the camera pixel position according to the tangent angle. The method of claim 10, wherein the _ includes: comparing the image of the first virtual point image with the J virtual point f, and whether the corresponding area of the physical energy distribution area corresponds to the plurality of touch input points. The method of claim 10, wherein the first reconstructed image is generated by the first camera unit corresponding to the mirror position in the step (6), the method further comprising: using the second camera unit to capture the indicator area The image generates a second real-point image; ” using the second camera unit to capture the image through the mirror to generate the first virtual point image; 201207702 according to the real point possible distribution area and the second camera unit corresponding to the mirror Positioning a second reconstructed image, the first real image and the second reconstructed image generating a second virtual point reconstructed image; and reconstructing the image according to the first virtual image, the first virtual image, and the second virtual image The point image and the second virtual point reconstructed image determine whether the real distribution area of the real point corresponds to a plurality of touch input points. 45