TW201101131A - Sensing system and method for obtaining position of pointer thereof - Google Patents

Abstract

A sensing system and a method for obtaining position of pointer thereof are provided. The system includes a sensing area, a reflecting mirror, an image sensor and a processor. The mirror is used for generating a mirror image of a pointer when the pointer is approaches the sensing area. The sensor is used for sensing the pointer and the mirror image thereof when the pointer is approaches the sensing area. When the pointer approaches the sensing area, the processor calculates a coordinate value of the pointer according to an image sensed by the image sensor and a predetermined size of the said pointer. Wherein, the pointer forms an imaginary orthographic projection in the sensing area, the processor regards the imaginary orthographic projection as a circular projection. The radius of the circular projection is the said predetermined size.

Description

201101131 VI. Description of the invention: [Technical field to which the invention pertains], and in particular to a sense of the invention, the invention relates to a technical measurement system in the field of touch and a method for obtaining the position of the indicator. [Prior Art] FIG. 1 is white A stereogram of the sensing system (Cal__Qing Claw). Referring to Fig. 1, the sensing system is configured to sense the position of the pointer 1〇2. In addition to the mirror 1〇4, the reflective element should be included, the image sensing device (4) and the processing circuit (1) are included. The reflections 〇1〇4, the reflective elements 1〇6 and 108, and the image sensing device 11〇 are all arranged, and on the same plane 114, the plane i 14 is, for example, a whiteboard whiteboard). Further, the rectangular area indicated by the 'indicator 116' is used as the sensing area of the sensing system 100. The above-mentioned reflective elements 106 and 1 8 can reflect light to the sensing area 116, and the mirror 1〇4 can produce a mirror image of the sensing area 116. The mirror 1〇4 can be made using a planar mirror (9), and its facet 118 faces the sensing region 116. As for the image sensing skirt 〇 1H), it is disposed at one corner of the sensing area 116, and its sensing range covers the sensing area 116. The processing circuit 112 is electrically connected to the image sensing device 11 to calculate the position where the pointer is moved according to the image sensed by the image sensing device 110. 2 is an explanatory diagram of the operation of the sensing system 100. As shown in FIG. 2, the portion below the dotted line 202 is a schematic representation of the sensing system touch of the portion to which the mirror surface 18 is reflected, and the portion above the dotted line is generated by the mirror 118. A mirror image of the above sensing system i(8). In this figure, the object indicated by 106' is the mirror image of the reflective element 1〇6, the standard # 〇8, the object referred to is the reflection of the reflective element (10), the indication is 11G, and the object referred to is the image sense 3 201101131 The image of the device 110 is measured, and H6 is indicated, and the area indicated is the mirror image of the sensing area 116. The object indicated by the symbol 1〇2' is a mirror image of the indicator 1〇2. It is sensed that the 'image' sensing device can sense along the sensing path 204 that the indicator 102' can also sense the image 1〇2 of the pointer 1〇2 along the sensing path 206. Fig. 3 is a schematic view of an image sensed by the image sensing device 11() of Fig. 2. In Fig. 3, the symbol 3 is indicated as an image sensing window of the image sensing device n〇. The oblique line area indicated by the indication 302 is the light reflected by the reflective element 106 and the mirror 1〇4, and a bright zone with a high brightness is formed on the image. This bright area is the main area. Sensing area. As for the indication 304, the dark lines caused by the indicator 102, and the indication 306 are the dark lines caused by the mirror image 102' of the indicator 102. In this way, the processing circuit 112 can further calculate the position of the indicator 102 according to the position of the dark lines 304 and 306 in the image sensing window 300, and the detailed calculation method can refer to the Patent Application No. 097126033 of the Republic of China. number. However, the sensing system 1 has a disadvantage, which is illustrated in Fig. 4. 4 is another illustration of the manner in which the sensing system 100 operates. As shown in FIG. 4, when the pointer 102 is near the boundary 192 of the sensing area 116, although the image sensing device 110 can still sense the indicator 102 along the sensing route 402, it can follow the sensing route. 404 senses the image 1〇2' of the indicator 102, however, since the sensing routes 402 and 404 are too close together, so in the image sensed by the image sensing device 110, only a single dark line may appear. 'Illustrated in Figure 5. FIG. 5 is a schematic diagram of an image sensed by the image sensing device 110 of FIG. 4. As shown in Fig. 5, the dark lines indicated by the label 5〇2 are indistinguishable from the dark lines caused by the indicator 102 or the dark lines caused by the mirror image 102' of the indicator. In this case, the sensing system 100 will not be able to calculate the position of the indicator 102. 201101131 [Summary of the Invention] Another purpose of the soil and the field X month is to provide a method for obtaining the position of the indicator, which is suitable for the above sensing system. ^ Invention proposed - a sensing system. The sensing system includes a subtraction area, an image sensing device, and a processing circuit. The mirror is used to create a mirror image of the object when the indicator is adjacent to: 1 'beef is. Image sensing device for adjacent to the indicator

G Near sensing area k senses the indicator and its mirror image. When the pointer is adjacent to the sensing area, the processing circuit calculates the coordinate value of the indicator according to the image sensed by the image sensing device and the size of the aforementioned object. Wherein, the indicator is formed in the sensing area - the imaginary positive 郷, the neon circuit regards the imaginary orthographic projection as a circular projection, and the radius of the circular projection is the predetermined size. The present invention further provides a method of obtaining the position of an indicator that is suitable for use in a sensing system. The above-mentioned system includes a Yang shipyard, a mirror and an image sensing device. The mirror is used to generate a mirror image of the indicator when the pointer is adjacent to the sensing area, and the image sensing device is used to sense the indicator and its mirror image when the pointer is adjacent to the sensing area. In this method, firstly, it is judged whether there is a finger "sensing area. Then, when it is judged as YES, according to the image sensing device ^ image and the above "Dingdi - predetermined size, (four) counts «the display of which 'indicator The sensing region forms a hypothetical orthographic projection, and the imaginary positive shadow is regarded as a circular projection, and the radius of the circular projection is the above-mentioned predetermined according to an embodiment of the invention, when the image sensing device senses; The image sensing device may sense the edge of the pointer along the first sensing route and the image sensing device may follow the image corresponding to the indicator and the mirrored portion corresponding to the indicator being sensed. The second sensing route sensing indicator ^=image=edge 5 201101131 - the step of mirroring the coordinate value between the first sensing route and the second sensing route includes: determining the first-sensing route and. ΐ一ιι, the line equation 'and defines the current axis of the indicator rod to the above predetermined size to obtain the first equation, the distance from the coordinate to the first sensing line is the predetermined size = the coordinates, the second Straight line of sensing route ^^ The ::= This second equation describes the size of the second unknown coordinate 2 f on the 34; according to the first equation and the second equation, the value of the unknown is used as the coordinate value of the material. One of the objects formed in the sensing area - the hypothetical orthographic projection is regarded as "in the present invention" as long as the first sensing path, the line straight line equation can be broken, and the indicator is defined at present _ heart 〇 finger: ?: mirror the current axis The heart coordinates are: the equation and the straight line of the predicted route, the straight line of the second sensing route, and the line obtained according to the first-next second equation, the first ancient/bucket type in 1 and the predetermined size described above. The distance is as large as the above:: ==::: coordinates to the first-sensing road according to the first equation and the second equation 43; in the big, you can solve the old problem if the above image cannot be produced. The problem of the above-mentioned and other objects, features and advantages of the present invention is more apparent and easy to understand. The following is a preferred embodiment of the present invention. The drawings are described in detail below. Hereinafter, the sensing system architecture illustrated in FIG. 1 will be used to illustrate the method for obtaining the position of the indicator proposed by the present invention. However, in this embodiment, the operation mode of the sensing system will be The sensing system mentioned in the prior art operates differently and will be described first.

G

In the invention of ί, firstly, the relevant information of the size of the indicator is obtained, so as to solve the problem that the old phase technology cannot calculate the finger value when the image overlaps partially. Therefore, the sensing system of the present invention needs There are two types of operation mode ribs to obtain the relevant information of the size of the indicator, and the operation is used to obtain the indication (4) membership value. The following describes the manner in which the relevant information is retrieved. Figure 2. It is assumed that the sensing system 100 is currently in the first type = fruit type and that the object 1 〇 2 is perpendicular to the sensing area, and the indicator is formed in the sensing area 116 to form a positive = clothing:: The shape is as shown in the shape of the icon 102 of Fig. 2. In this example, the shape of the orthographic projection is such that the processing circuit 112 will be regarded as a circular projection of the day and the object is removed. The orthographic projection is regarded as a circular projection, so the steps shown in FIG. 6 are used to obtain the relevant information of the size of the indicator, and FIG. 6 is a diagram of obtaining the '-range' of the indicator according to the present invention. In order to obtain the predetermined size of the indicator": please Fig. 6 and FIG. 7. In the figure ", the view is 2 2 = circular projection, and the area indicated by U6 is expressed as the sense_domain, the ^01 201101131. The coordinates of the four corners of the sensing area 116 are (W.), ( X_+7f), , outside) and (%+". + bucket processing circuit 112 can first use the old finger position sensing method, for example, using the calculation method disclosed in the aforementioned Chinese = fine number, __ ^2. = In the column, the coordinates of the pointer 102 are ^), and the coordinates of the center of the U-shaped projection 702 of the pointer will be the same. Change the sentence 7=Γ coordinates are also (~, ~). At this time, the processing circuit 112 can pass through the image sensing device ii 沿 along an imaginary path ❹ ❹ ^) 4 and form a tangent point on the circular projection as shown above (steps of FIG. 6 are performed, and steps are performed) After S602, the processing circuit 112 can: the distance from the coordinates of ::::02 to the above-mentioned tangent point, as an indication, please refer to 6f). If the ===' of the hypothetical route 704, the processing circuit 112 can follow the following formula (1)

P (1) yP + bx \ + 1 , where " is the predetermined size of the coordinates of the indicator 102 to the above-described tangent point indicator 102. This predetermined size is the size of the information. Of course, in addition to the imaginary route: 4: mouth size r, you can also use the imaginary route 7〇6 to get the payment. You can also use the imaginary route 7〇4 and 706 to get the second stroke and then take the average. To get a more accurate value. In addition, although in the above embodiment, the instruction is used to obtain the predetermined size of the pointer 1G2, the present invention may also obtain the pointer value of the mirror image 102 of 102 to obtain the indicator 1〇2. The size of the object, the mussels, and the step 8 201101131 are shown in Figure 8. Figure 8 is a flow chart showing the predetermined size of the pointer in accordance with another embodiment of the present invention. In Fig. 8, the recording towel first obtains the coordinate value ' of the image 1〇2 of the pointer 1〇2 and reflects the mirror image of the pointer 1〇2 as a mirror image of the circular projection 702, at which time The processing circuit m can form all points on the mirror image of the circular projection 7 〇 2 through the image sensation device 110 (7) imaginary route (as shown in step 8 of FIG. 8). Next, the processing circuit m indicates the distance from the coordinates of the mirror 1〇2' to the above-mentioned tangent point, as: ,,, and the size of the object 1 〇 2 - as shown in step 8 of Figure 8. ). The value Ο Ο 提 is that the predetermined size of the indicator 1 〇 2 used in the present invention may also be built in the processing circuit 112 in a predetermined value. / month again refer to Figure 1. After the predetermined size r of the pointer 1 〇 2 is obtained, the 糸 is sensed, and the first 100 mode is entered into the second operation mode to sense the coordinate value of the object. In this mode, the processing circuit 112 determines whether the image corresponding to the indicator 1G2 and the image of the image 102 corresponding to the image 102 of the finger object 102 are partially overlapped by the image sensing device 110. . In other words, the L-processing circuit 112 will determine if a situation similar to that of Figure 1 above has occurred. When the processing circuit 112 determines that there is a situation in which the image partially overlaps, it indicates that the pointer 102 is too close to the boundary of the sensing area 116, as shown in FIG. FIG. 9 is a further illustration of the operation of the sensing system 100. In FIG. 9, "the same reference numerals as in FIG. 4 denote the same objects" will not be described herein. In this case, the image sense The measuring device 110 can still sense the edge of the indicator 102 along the sensing route %2, and the image sensing device 11 can still sense the edge of the mirror 1 〇 2 of the indicator 102 along the sensing route 904. As can be seen from FIG. 9, the indicator 1〇2 and its mirror image 1〇2 are between the sensing route 902 and the sensing route 904. In the above case, the processing circuit 112 can follow Figure 1〇9 201101131

The way shown is to operate. Fig. 10 is a flow chart showing the coordinate values of the pointers obtained in the case where the images are partially overlapped, and Fig. 11 is an explanatory view showing the coordinates of the pointers in accordance with an embodiment of the present invention. The respective indications in Figure U will be described below. In Fig. 11, the symbol 1〇2 is indicated as an indicator, the label 1〇2 is indicated as a mirror image of the pointer 102, the area indicated by the numeral 116 is indicated as a sensing area, and the area indicated by the symbol 116' is expressed as a feeling. A mirror image of area 116 is measured. Wherein, the coordinates of the four corners of the sensing area 116 are respectively, (Wo+ ugly), (x0+l^〇), and (x〇+j^〇+milk, and the mirror image 116 of the sensing area 116 is four The coordinates of the corners are (JW; 0 + //), (^fan +2//), less 〇+ //) and (xG+% eight +2 ugly). Moreover, the values of these six coordinates are known 'and are recorded in the processing circuit 112. 10 and FIG. In the method of FIG. 1A, the processing circuit first corrects the straight line equations of the routes 9〇2 and 9〇4, and defines the current axis coordinates of the indicator 102 as unknown coordinates (Ά), and defines the indicator. The current axis of the image 102' of 1〇2 is an unknown coordinate (\, 2-8 + 2 ugly-heart), as shown in step S1 of Figure 10. In this example, the straight line equation for sensing the route 9〇2 is ^ =所# + \, and the straight line equation for sensing the route 9〇4 is produced by ~χ + Κ. Then, the processing circuit 112 senses the line 902 according to the unknown coordinate ^, the straight line equation and the size of the pre-syntax m.

—=r (2) The distance from the large coordinates ^) to the sensing route 9〇2 & large (as shown in step S1004 of Fig. 10). Next, the processing circuit 112 obtains the equation described in the following 3 10 201101131 (3) according to the unknown (2 sense line 904 straight rear m (4), the scar 罝 line private and the predetermined size r described in the following: m'^P~~{2y^2H-yp) + b\\ gate, ' ——, —=--r ......(Λ)

Vw, /+1 ' This equation (3) describes the distance from the unknown coordinate to the sensing route 904 to a predetermined size " (as shown in step S1006 of Fig. 10). Therefore, the processing circuit 112 can calculate the value of the unknown coordinate (\, JP) as the coordinate value of the indicator 102 according to the formula (1) and the equation (2), and the calculation flow is sequentially performed by the following two The value of the simultaneous equation and the resulting unknown coordinates, outside) is expressed as: ^ \mRxP ~yp+ = r^jmR2 +1 \m'L χΡ ~ (2^〇+2H-yp) + b\\ = r^ m\2+l <mRxp- yp+bR= -r^[mR2 +1 m Lxp~ (23;〇+ 2H - yp) + b'L = r^jm'L2+l (jc 〇Λ)

Wv+l + rjm\2+l +(2Vn+ 2H) ~br +b\ f- mR + m\ »mRxP +^r+ r4mR +1 With the above, even if a situation similar to that shown in Fig. 5 above occurs The sensing system and the system proposed by the invention can still calculate the coordinates of the indicator withdrawal> problem. It is worth mentioning that the order of execution of steps S1004 and S1006 of FIG. 1 is not limited. In the second mode of operation, when the processing circuit 112 determines that there is no finger ΐ, the shape of the processing power (four) can use the old, / set sensing method, such as the use of the aforementioned Republic of China patents in the case of the 11th The calculation method disclosed in No. 201101131 097126033 is used to obtain the coordinate value of the above-mentioned indicator ι〇2. Of course, the processing circuit 112 can also calculate the coordinate value of the pointer by using the previously obtained predetermined size, and its operation mode is as shown in FIG. 12 Ο FIG. 12 is another flow chart for obtaining the coordinate value of the pointer according to an embodiment of the present invention, and FIG. 13 is another explanatory diagram for obtaining the coordinate value of the pointer. Please refer to Figure 12 and Figure 13 at the same time. The image sensing device 110 may sense the edge of the sensor 102 along the sensing paths 1302 and 1304 when the partial overlapping of the images does not occur. As shown in Fig. 13, the pointer 1〇2 is interposed between the sensing path* lines 13〇2 and 1304. In the method of FIG. 12, the processing circuit 112 first determines the linear equations of the sensing routes 1302 and 1304, and defines the current coordinate of the pointer 1〇2 as an unknown coordinate, as shown in step 12 of FIG. Show. In this example, the straight line equation for sensing route 1302 is +^, and the straight line equation for sensing route 1304 is household +\. Next, the processing circuit 112 senses the route 13〇2 according to the unknown coordinates (5, VIII). The equation of the straight line and the aforementioned pre-lt; size r obtain the equation described in the above ^(7), again as follows: .(2)

yP+bR + 1 is pre-1 (2) and can be used to describe the distance of the unknown coordinates (5, outside) to the sensing route 1302 (as shown in step S1204 of Fig. 12). Then, the linear equation of the processing circuit 112 α coordinates (\, 4), the sensing route 13〇4, and the foregoing equations are obtained by the following equation (4): .(4) ... yP+bL\ , The sentence size 〃 (as shown by the step S1206 in which the distance from the unknown coordinate to the sensing route 1304 is predetermined to be 12). Then, the processing circuit 112 can calculate the unknown according to equations (2) and (4) 12 201101131. The value of the coordinates (\, VIII) is represented by ' as the coordinate value of the pointer 1 〇 2 (as shown in step S1208 of Fig. 12), and the value of the finally obtained unknown coordinate Op, 4) is expressed as follows: (Wp)= - . 3· ....... +bR+r^mR2+\ . It is worth mentioning that the order of execution of steps S1204 and S1206 of Fig. 12 is not limited. The same principle is that when the image overlaps partially, the image sensing device 110 can sense the edge of the mirror image 102' of the pointer 102 along the first sensing route and the second sensing route. The image of 〇2 is 1〇2, between the first-sensing route and the second sensing route. Then, the processing circuit 112 can also calculate the coordinate value of the indicator 102 by using the previously obtained predetermined size r and the image 1〇2 of the pointer 1〇2, as shown in FIG. Figure 14 is a flow chart showing the acquisition of the coordinate value of the pointer in accordance with an embodiment of the present invention. In the method of FIG. 14, first, the linear equation of the first sensing route and the second sensing route is determined and the mirror image 1 of the indicator 102 is defined, and the current axis coordinate is an unknown coordinate (FIG. 14). Steps sl4〇2). Then, the first equation is obtained according to the unknown coordinate, the linear line of the first-sensing route, and the predetermined size r. The first equation describes the distance from the unknown coordinate to the first sensing route to a predetermined size r (as shown in FIG. Step sl4〇4)). Then, according to the unknown coordinate, the linear equation of the +2th sensing route, and the predetermined size ", the second square=form is obtained, and the second equation describes the distance from the unknown coordinate to the second sensing route as the pre-ramp size r (eg Step SM〇6 of Fig. 14). Next, the value of the unknown coordinate is calculated according to the first equation and the second equation to further calculate the coordinate value of the pointer 102 (as shown in step SM8 of Fig. 14). Further, it is worth mentioning that 13 201101131 is not limited to the execution order of steps S1404 and Sl406 of Fig. 14. Figure 15 is a diagram showing the main operational flow of obtaining the position of the indicator in accordance with the sensing system of the present invention. The m system includes a ❹m domain, a reverse, and an image sensing device. The mirror is used to mirror the image when the indicator is adjacent to the sensing area. Yingxian County, the device, sensed the object and its lining when it turned to the near-sensation field. In this case, the first indicator is to touch the above-mentioned indicator to be the near sensing area (as shown in step S15G2 of Fig. 15). Then, #judge

Ο 'According to the image sensed by the image sensing device and one of the above-mentioned indicators predetermined ^ small ' to calculate the coordinate value of the indicator 'where the indicator is formed in the system area - imaginary orthographic projection, and this imaginary positive projection Is a circular projection, and the radius of the circular projection is the predetermined size described above (as described in the step (10) 4 of FIG. 15 , the present invention is based on the fact that the image overlaps partially. Small to calculate the coordinate value of the indicator, *This predetermined size is the radius of the circular projection obtained by the indicator in the sensing area - the imaginary orthographic projection is regarded as a circular projection. As long as it can determine the straight line type of the ^-sensing route and the second sense line, and define the axis coordinate of the indicator object = the first-unknown coordinate, and define the mirror image of the current axis coordinate Two unknown coordinates, and then obtaining the first equation according to the first-unknown coordinate, the first sensing route, the straight line equation, and the predetermined predetermined A small;;, according to the first, the unknown coordinate, the second sensing route, the straight line equation and the above Pre The second equation is obtained by the size, and the towel-the equation describes the first-unknown coordinate f-sympathetic_the same as the predetermined size, and the second equation describes the distance from the second unknown sense to the second sensing route. According to the predetermined size, the value of the first unknown part and the second wire can be calculated as the coordinate value of the indicator. There is a problem that the sensing technique cannot calculate the coordinate value of the 14 201101131 指示 indicator of the above image part. (4) Although the present invention, the invention is disclosed in the above preferred embodiment, it is not used. To the extent that it is possible to do this, the skilled person will not be able to deny the spirit and scope of the invention, and the invention is not limited to the scope of the invention. FIG. 2 is an explanatory diagram of the operation mode of the sensing system 1 . FIG. 3 is a schematic diagram of the image sensed by the image sensing exhibition of FIG. 2 . FIG. 4 is an operation of the sensing system 100 . The other way of the figure. Figure 5 is the image of Figure 4. FIG. 6 is a schematic diagram of a schematic diagram of a method for obtaining a predetermined size of an indicator according to an embodiment of the present invention. Fig. 8 is a flow chart showing the predetermined large size of (4) in accordance with the present invention. Fig. 9 is a further explanatory view of the operation mode of the sensing system 100. Fig. 10 is a view of the present invention. In the case of the process, the image is partially overlapped. FIG. 11 of the object's maturity value is an explanatory diagram for obtaining the coordinate value of the indicator object, and the process of obtaining the coordinate value of the reading of the present invention is verified. Figure 13 is a further explanatory diagram for obtaining the coordinate value of the indicator. 15 201101131 Figure 14 is a flow chart of obtaining the coordinate value of the indicator according to an embodiment of the present invention. Figure 15 is a flow chart showing the main operation of a method for sensing the position of a pointer in accordance with the present invention. [Main Component Symbol Description] 100: Sensing System 102: Indicator 104: Mirrors 106, 108: Reflective Element® 110: Image Sensing Device 112: Processing Circuit 114: Plane 116: Sensing Area 118: Mirror 192: Boundary 102, 106', 108', 110, 116,: mirror 202: dashed line 0 204, 206, 402, 404, 902, 904, 1302, 1304: sensing route 300: image sensing window 302: bright area 304 306, 502: dark lines 702: circular projections 704, 706: imaginary routes S602, S604, S802, S804, S1002, S1004, S1006, S1008, S1202, S1204, S1206, S1208, S1402, S1404, S1406, S1408, S1502, S1504: Step 16

Claims (1)

201101131 VII. Patent application scope: 1. A sensing system, comprising: a sensing area; a mirror 'for mirroring the object; and sensing one when the indicator area is generated adjacent to the sensing area An image sensing device for sensing the indicator and its image near the pointer; and " - processing the electroacoustic 'when the material is adjacent to the sense field, the processing circuit calculates the coordinate value of the finger reading according to the image sensed by the image sensing device and a predetermined size of the indicator. Wherein the finger is turned into the sensing region to form a hypothetical orthographic projection. The processing circuit treats the false red projection as a circular projection, and the radius of the circular projection is the predetermined size. z. The sensing system according to item 1 of the above, wherein the image sensed image and the sensed portion of the image corresponding to the image of the object are heavy, the image sense The measuring device can sense the edge of the indicator along the second-sensing route, and the image sensing device can sense the edge of the mirror image of the indicator, the indicator and its mirror image; Line_Secondary route, then the first-sensing route and the second sensing can be determined; meaning=: refers to, the axis coordinate of ! is - the first - not two Ϊ 2 曰 1 of 1 The axis coordinate is a second unknown seat; J:#, Hai first unknown coordinate, the first-sensing route: straight line 俨%: one wide* and get-the first equation> and according to the second unarmed line a straight line equation and the predetermined size to obtain ·4 '" according to the first equation and the second equation, the second f is not calculated, and further as a coordinate value of the indicator, wherein the third formula describes the first - the distance from the unknown coordinate to the first-sensing route is 17 201101131, and the second equation describes the second unknown coordinate distance as Predetermined size. To 4 brothers, one of the sensing routes 3, such as the scope of patent application! The sensing system described in the item, the image sensing device corresponding to the pointer corresponding to the indicator, the image corresponding to the mirror image of the indicator does not overlap, the H彡 image is a route and the second sense The measurement path senses the edge of the indicator, G === determines the first sensing route and the second sense two: ί obtains a first equation, and according to the linear equation of the unknown coordinate second-sensing route And the predetermined size _ obtains the value of the first equation and the second equation "out of the:", and further serves as a coordinate value of the indicator, wherein the distance from the first to the sensing route is The predetermined size, and;;; the second feeling ___ fixed ^,. Like the sensing device senses the pair of frictions, J糸, and first, where the b-shadow corresponds to the image of the pointer and the sensed image can be detected along a first--- At the time, the image senses the edge of the skirt, between the mirror lines of the lion reading, and now the Luris Γ is like the first sensing route and the linear line of the second sensing route: Measure the route and the unknown coordinates of the shoulder, and the current mirror image of the rape is as the coordinate line of the line - ==! Unknown coordinates, the first-sensing road H peach_line equation and the predetermined size and get 18 201101131 The value of the unknown coordinate is calculated to be small in the second equation, and the distance of the sensing route on the second equation is 峨 is the predetermined size. (4) The distance from the 5th to the second _ route Ο 卜 巾 巾 巾 巾 巾 巾 巾 巾 巾 巾 巾 巾 巾 巾 巾 巾 巾 巾 巾 巾 巾 巾 巾 巾 巾 巾 巾 巾 巾 巾 巾 巾 巾 巾 巾 巾 巾 巾 巾 巾 巾 巾 巾 巾 巾 巾 巾 巾 巾The job is located along the imaginary road, and the rhythm projection forms a Na, and then the processing circuit calculates the distance from the coordinates of the object to the tangent point as the predetermined size. The sensing system of claim 1, wherein the processing circuit obtains the predetermined size, and first obtains a coordinate value of the mirror image of the indicator, and mirrors the indicator. a mirror image of the circular projection, wherein the processing circuit can transmit the image sense at this time; the device forms an image on the mirror image of the circular projection along an imaginary route, and then the processing circuit calculates the indication The distance from the coordinate of the object to the tangent point 'as the predetermined size. 7. A method for obtaining a position of an indicator, suitable for use in a sensing system, wherein the 5 ray sensing system includes a sensing area, a mirror, and an image sensing device for the indicator A mirror image of the indicator is generated adjacent to the sensing area, and the image sensing device is configured to sense the indicator and a mirror image thereof when the indicator is adjacent to the sensing area, the method comprising: determining whether the indicator is adjacent The sensing area; and when the determination is yes, calculating a coordinate value of the indicator according to the image sensed by the image sensing device and a predetermined size of the indicator, wherein the indicator is in the sensing area Forming a hypothetical orthographic projection, and the imaginary orthographic projection is regarded as a circular projection, and the radius of the circular projection is the predetermined large 19 201101131 The method of claim 7, wherein the image sensed two-:S corresponds to the image of the indicator and the image portion of the corresponding flute two-t image that is sensed The image sensing device can measure the edge of the indicator along a flute 22i, and the image sensing device can measure along a #: m7: the edge of the mirror of the sea pointer' where the indicator And a second step between the sensing route and the second sensing route, and the step of calculating the coordinate value of the pointing object comprises: Ο ο - meaning the route and the straight line equation of the second sensing route, and ί it axis coordinates ^ first - unknown coordinates, and the secret coordinates defining the 曰 为 — - second unknown coordinates; predetermined large: and U ί private, the first-sensing route linear equation and the seat a corpse to an equation, the equation describing the distance from the first unknown coordinate to the first sensing route to the predetermined size; a predetermined = and a coordinate, a linear equation of the second sensing route, and the equation The second equation describes the second unknown 仏 to the first sensation of the The distance is based on the first equation and the seven buckles, and the value of the standard, as the (four) object ^^~ value of the silk type calculation of the first - unknown seat 9, as claimed in the scope of the seventh test device The impression corresponding to the finger L 'where the image is sensed in the image of the indicator does not overlap the image of the two measurements = a corresponding sense channel and a second sense route sense, a ^ Sense f can be along the indicator between the first-sensing route and the second sense: the edge of the second, the step of r the coordinate value of the indicator comprises: i, between the lines, and S ten nose determination a linear equation of the first-sensing route and the second sensing route, and 20 201101131 defines that the current axis coordinate of the indicator is an unknown coordinate; = a straight line equation of the unknown pure m-line and the predetermined first-order formula The first equation describes the distance from the unknown coordinate to the first sensing route to the predetermined size; ^ the unknown lag, the second _ road_recording wire, the predetermined second equation, the second equation describes the unknown The distance from the coordinates to the first sensing route is the predetermined size And Ο Ο the first equation and the first equation calculate the value of the unknown coordinate as the coordinate value of the indicator. The method of claim 7, wherein when the image sensing device is mounted, the image of the image of the material and the corresponding image of the corresponding object are not heavy (four), the image sense The job can be along a line of the younger brother and the n-measurement_measuring the mirror image of the edge of the indicator is displayed between the first sensing route and the second sensing route, and the indicator is The steps of the coordinate value include: = the sense line and the straight line equation of the second sense route, and define the mirror image of the current _ heart coordinate as - unknown corpse. m seat; the first-sensing route a linear symmetry second program describing the unknown coordinate to the linear equation of the second route and the predetermined equation, the second equation describing the distance from the unknown coordinate to the second _ sense route For the predetermined size; and ^ wire handle to calculate (four) the value of the unknown coordinates, to improve the coordinates of the ten ^ ~ 5 Heza exhibit. The method of claim 7, wherein the sensing system 21 201101131 further comprises a processing circuit, and the step of obtaining the predetermined size comprises: obtaining a coordinate value of the indicator, wherein The processing circuit can form all points on the circular projection along the imaginary route through the image sensing device; and calculate a distance from the coordinates of the pointer to the tangent point as the predetermined size. 12. The method of claim 7, wherein the sensing system further comprises a processing circuit, and the step of obtaining the predetermined size comprises: obtaining a coordinate value of a mirror image of the indicator, and Mirroring is considered to be a mirror image of the circular projection, wherein at this time, the processing circuit can form an image on the mirror image of the circular projection along an imaginary route through the image sensing device; and calculate a mirror image of the pointer The distance from the coordinates to the tangent point as the predetermined size. ❹ 22