TW200839192A - Measuring method, measuring device and photographing system - Google Patents

Abstract

A measuring method is provided to measure the distance between a photographing system and an object under test. The photographing system includes a lens, an image processing device and a display device. The image processing device processes the image captured by the lens so as to show a screen on the display device. First, a horizontal line is shown on the screen wherein the horizontal line simultaneously passes a first under test point and a second under test points in the image. As a first distance is kept between the lens and the object under test, a first pixel value and a second pixel value corresponding to the first under test points and the second under test points on the screen are obtained. When the height between the photographing system and the ground is kept unchanged, the distance between the lens and the object under test is changed. When a second distance is kept between the lens and the object under test, a third pixel value and a fourth pixel value corresponding to the first under test points and the second under test points on the screen are obtained. Based on a distance difference between the first and second distances, the distance between the object under test and photographing system is calculated.

Description

200839192 IX. Description of the Invention: [Technical Field] The present invention relates to a photographing system, and more particularly to a photographing system having a distance measuring function. [Previous technique #?] It is known that a shooting system with a distance measurement function (such as a digital camera) uses optical design to assist focusing, and the principle is to mount two angle-reducing mirrors on the two fixed ends of the digital camera. . When the focus ring of the lens is rotated (ie, the focus point of the lens is changed), the refractor is driven to rotate. When the refractor is switched to a preset angle, the object that it wants to focus on is superimposed into two images by the two images (generated by the refraction of the two refractors), and the lens also performs the focusing operation at the same time. Since the above-mentioned digital camera uses two observation points having a certain distance as a triangulation parameter, and by rotating the refractor at the two observation points, the image overlap is achieved. However, image overlap is achieved based on the observation of the human eye. Because of the error, it is easy to produce errors due to the sensory differences of the human eye, and an inaccurate measurement distance is obtained. For example, when the human eye first views the fixed object in front of the eye with only the right eye and then views the fixed object with only the left eye, the position of the fixed object seen twice will be slightly different, thus making the image impossible. Completely overlapping. In order to solve the above problems, it is conventional to measure the distance using ultrasonic ranging or laser ranging. Both of these methods use the reflection principle, so the distance between the system and the object to be tested can be measured without touching the object to be tested. However, when the reflective surface is poor, the measurement error increases. SUMMARY OF THE INVENTION The present invention provides a measurement method for measuring a distance between a photographing system and an object to be tested. The photographing system has a lens, an image processing device, and a display device. The image processing device processes the image captured by the lens such that the display device presents a picture. First, in the facet, a horizontal line is presented, wherein the horizontal line passes through one of the first and second points to be measured in the image at the same time. When the lens and the object to be tested maintain a first distance, it is known that the first and second points to be measured correspond to one of the first and second pixel values of the picture. Change the distance between the lens and the object to be tested with the same height between the shooting system and the ground. When the lens is kept at a second distance from the object to be tested, it is known that the first and second points to be measured correspond to one of the third and fourth pixel values of the facet. The distance between the object to be tested and the photographing system is calculated based on a distance difference between the first and second distances. The present invention further provides a measuring device for measuring the distance between a photographing system and an object to be tested. The photographing system has a lens, a photosensitive element, a processor, and a display device. The photosensitive element senses the image captured by the lens to generate a first image signal. The processor processes a second image signal to generate a processed signal. The display device presents a facet based on the processed signal. The measuring device of the present invention comprises a setting module, a testing module and an operation module. The setting module provides a first scan signal for presenting a horizontal line in the plane. The horizontal line passes through one of the first and second points to be measured simultaneously. The detection module detects the pixel values corresponding to the first and second points to be measured. The computing module calculates the distance between the camera system and the object to be tested according to the detection result of the detection module, and processes the first scan signal and the first image signal to generate a second image signal. The invention also provides a photographing system comprising a lens, a photosensitive element, a measuring device, a processor and a display device. The lens is used to capture an image. The photosensitive element senses the image to generate a first image signal. The measuring device comprises a setting module, a detecting module and an operation module. The setting module provides a first scan signal for presenting a horizontal line in the face. The horizontal line passes through one of the first and second points to be measured simultaneously. The detection 〇 module detects pixel values corresponding to the first and second points to be measured. The computing module calculates the distance between the shooting system and the object to be tested according to the detection result of the detecting module, and processes the first scanning signal and the first image signal to generate a second image signal. The processor generates a processing signal based on the second image signal group. The display device presents a facet according to the processed signal. The above and other objects, features, and advantages of the present invention will become more apparent and understood <RTIgt; 1 is a flow chart of the measuring method of the present invention. The measuring method of the present invention is used to measure the distance between a photographing system and an object to be tested. The photographing system can be a digital camera or a digital camera having a lens, an image processing device, and a display device. The image processing device processes the image captured by the lens such that the display device assumes a face. In the facet presented by the display device, a horizontal line is presented (S110). The horizontal line simultaneously passes through one of the first and second points to be measured in the image. Then, 7 200839192, in the case where the lens and the object to be tested maintain the first distance, it is known that the first point to be measured should be one of the first and second pixel values of the face (S120). First, in the case where the height between the photographing system and the ground is constant, it is known that the first and second points to be measured correspond to one of the second and fourth pixel values of the mu surface (S140). In this embodiment, the lens of the photographing system is the distance between the lens and the image door: the distance between the lens and the image can be changed by the position of the entire lens for 5 weeks. In the case of other implementations, it is necessary to change the distance between the camera and the waiting object by changing the distance between the camera and the object to be tested. . According to a distance difference between the first and second distances, the shot, the money and the object to be tested are known. In other embodiments, the distance information between the photographing system and the object to be tested is presented in the facet. Figures 2a to 2e are schematic views of the measurement method of the present invention. In the example, the money is taken as a digital camera. In the face 2〇〇 presented by the step display device, the flat line 210 passes through the points to be tested 211 and 212 at the same time. Water On a digital camera, an adjustment component can be provided to adjust the position of 210 so that it can pass through points 211 and 212 to be tested simultaneously. In the example, the horizontal line 2 i 〇 can also be adjusted by the mosquitoes in the _ _ Ί to adjust the height of the digital camera to the ground so that the water is passed by points 211 and 212. In the present embodiment, the points to be tested 211 and 212 #鼻一抓# % π &amp; . ^ y Both ends of the object . In other embodiments, fmil and 212 may also be two objects, such as florets next to each other. Adjusting the corresponding pixel value of the to-be-measured points 211 and 212 in the face 2' can be set to the cursor point 221 and 222 or the cursor line on the flat line 210, and then through an adjustment mechanism on the digital camera to adjust The recreation points 221 and 222 or the positions of the cursor lines 231 and 232. The cursor points 221 and 222 are taken as an example, and the cursor point 221 is moved to the point to be measured 211, and the corresponding pixel value of the point to be measured 211 can be known. In addition, moving the cursor point 222 to the point to be tested 212, the pixel value corresponding to the point 21 to be measured can be known. For example, if the total pixel value of the horizontal line 210 is 1〇24, the cursor point 221 is incremented from the pixel value 1 to the right, and the cursor point 222 is decremented from the pixel value to the left. When the cursor point 221 is moved once, the pixel value is automatically incremented by 1, and when the cursor point 222 is moved once, the pixel value is automatically decremented by i. When the G vernier points 221 and 222 are overlapped with the points to be measured 211 and 212, respectively, the pixel values corresponding to the points to be measured 211 and 212 can be known. In the case where the height between the digital camera and the ground is constant, if the distance between the lens and the object to be tested is changed, the size of the face 200 will also change. Assuming that the distance between the lens and the object to be tested is shortened, the image in the face of the face becomes larger, so that an image such as the face 201 can be produced. As shown in Figure 2b, since the height between the digital camera and the ground does not change, the horizontal line 210 will still pass through the points to be tested 211 and 212, just 9 200839192

Calculate the point to be measured before and after the lens displacement. By controlling the pixel values corresponding to the new image corresponding to the cursor points 221 and 212, it is known

The pixel values corresponding to 211 Α 212 are Pa(h2) and Pb(h2), respectively. The distance between the digital camera and the object to be tested·· Figure. As shown in the figure, when 锫 士 h (after lens shift), ίD{hx) is measured. Since the distance between the points 211 and 212 to be measured is proportional to the occupied pixel value, In the face 2〇〇, the distance between the points 2ΐ and 212 to be measured {the relationship with the occupied pixel value is as follows: where 'NCh!) is the points to be measured 211 to 212 on the screen 200 The pixel value, that is, the difference between the pixel values Pa(hi) and pb(hi), D(h〇 is the maximum actual horizontal distance that can be captured by the image before the mirror head is not displaced, ^ 11^ is the total pixel value of the horizontal line 210. In the pupil 201, the relationship between the distance between the points 211 and 212 to be measured and your pixel value is as follows: "_D(h2)

Where N(h2) is the difference between the pixel values occupied by the points 211 to 212 to be measured 201, that is, the pixel values Pa(h2) and Pb(h2), and D(h2) is the lens displacement. , the maximum actual horizontal distance that can be captured by the image surface, N

Nmax 200839192 is the total pixel value of the horizontal line 210. Since the distance between the points to be measured 211 and 212 and the total pixel value Nmax of the horizontal line 21〇 are fixed, the following equation can be obtained: D{hx) = N(h2) ·· _2) one release 1) .. ................() As shown in Figure 2c, before and after the lens shift, there will be a similar isosceles triangle with D(h2) as the base. When the isosceles triangle has D(hl) as the base, the height of the isosceles triangle is hi+hs. When the isosceles triangle is Ο

When D(h2) is the bottom edge, the height of the isosceles triangle is h2+hs. Therefore, the following formula can be obtained: hl+hs ^N(h2) h2+hs N{hx) .................. Because, therefore, the distance hi and respectively are as Equations (7) and (6) are as follows. ............(5) h2 --hs ............(6) where Ah is the distance difference before and after the lens shift, hs is the digital camera The distance between the photosensitive element and the lens. Since hs is small, it can be ignored. Since the pixel values occupied by the points to be measured 211 to 212 on the screen 200, the pixel value N (h2) occupied by the pixels 2 211 to 212 on the screen 201, and the distance Δΐχ of the lens displacement are all known, the transmission type ( 5) With equation (6), the distance between the digital camera and the object to be tested can be known. For digital cameras with different brands, the distance between the internal photosensitive element and the lens is not the same. In the above embodiment, the distance hs between the photosensitive element and the lens of 200839192 is ignored. However, if you want to improve the measurement accuracy of the distance, consider the distance hs between the photosensitive element and the lens. The following describes how to find the distance hs between the photosensitive element and the lens. When measuring the distance between the digital camera and the image, the distance hs between the sensor and the lens can be considered together. Therefore, before measuring, the distance h between the photosensitive element and the lens needs to be known. Figure 3a is a schematic diagram of measuring the distance between the photosensitive element and the lens. First, by using the vertical scale 310, the digital camera 33 and the horizontal amount f) the ruler 320 can know the maximum horizontal distance Dml that the lens 331 can capture while maintaining the distance hml. Then, move the horizontal ruler 32〇. In the case where the digital camera 330 and the horizontal f-foot 320 are kept at the distance hm2, the maximum horizontal distance Dm2 that the lens 331 can capture is known. As shown in Figure 3a, because there are two similar isosceles triangles in the figure, which are based on the widths Dml and Dm respectively, the following formula can be obtained: K + ^m2 _ ^ +

Dmi .....................(7) After simplifying (7), the following formula can be obtained: U h —hmlDm2-hm2Dm\ , one —.. ................(8) Substituting equation (8) into equations (5) and (6), the distance between the photosensitive element of the digital camera and the image can be known. Hs. By calculating the difference between the aberration values corresponding to the two points to be measured, in addition to knowing the distance between the digital camera and the object to be tested, the distance between the two points to be measured can also be obtained. The following describes how to find the actual distance ^ between two points to be measured. Figure 3b is a schematic diagram showing the actual distance between two points to be measured. The 200839192 3b picture is similar to the 2c picture. ^ (four) pay no. Hey, I know that the mirror is wrong by three il/years, and that it is nr bad.

Y2m) ...................(9), then the actual cot% between the two points to be measured is obtained. Substituting equation (1) into equation (9) The simple distance is: ^2(/,1+^)|Wtan% ...............

iVmax J

It can be seen from the above that by knowing the pixel values corresponding to the two points to be measured, the distance between the shooting system and the object to be tested, and the series between the two points to be measured in the image can be obtained. If the two points to be measured of the image towel are the same end of the object, the approximate area of the object can be known by finding the distance between the ends of the object in the other direction. Figure 4 is a possible embodiment of the photographing system of the present invention. As shown, the photographing system 400 includes a lens 41, a photosensitive element 420, a measuring device 430, a processor 440, and a display device 450. The lens 410 is used to capture an image, which may be a telescopic lens or a fixed lens. The photosensitive element 420 can be a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS) for sensing the image to generate the image signal group V01. The measuring device 430 processes the image signal group V01 to generate a video signal group V02. The processor 440 processes the image signal group V02 to generate a processing signal to the display device 450 (e.g., a liquid crystal display) to render it corresponding to the face. 13 200839192 In the embodiment, the measuring device 430 includes a setting module 431, a detecting module 432 and an operation module 433. The setting module 431 provides a scan signal VHK for setting a horizontal line in the face of the display device 450. The horizontal line simultaneously passes through the first and second points to be measured of the image captured by the lens 410.

The detection module 432 detects pixel values corresponding to the first and second points to be measured, and provides pixel values ML and MR. When the distance between the lens 410 and the first and second points to be tested is not changed, the detecting module 432 detects the pixel values Mli, Mri corresponding to the first and second points to be measured. When the distance between the lens 410 and the first and second points to be measured is changed, the detection module 432 can detect the pixel values M12 and MR2 corresponding to the first and second points to be measured. If Fig. 2a is a facet of the display device 450, the set mode group 431 is used to set the horizontal line 210 that passes through the points to be measured 211 and 212 simultaneously in the facet 200. The detection module 432 is used to know the pixel values corresponding to the points to be measured 211 and 212 when the lens is shifted forward and backward. In this embodiment, the cursor points 221 and 222 are set in the face 2 through the detection module 432, and the points to be measured 211 and 212 are in the mouth when the lens points are moved by the cursor points 227 and 222. - virtual t 4 should be &lt; pixel value. In the conventional example, the cursor points 221 and 222 can be set in the gold product 200 by the setting module 432. The operation module 433 calculates the distance between the photographing system and the first and second points to be tested according to the detection module 432; the signal VHK and the image (4) vG1, and the raw image signal ^ processing (4) 200839192 When the 44 〇 走 m m is set to 450, it is displayed; the image signal V. 2 Transfer to the display device The facet shown by the lens 410 is displayed in addition to the vernier line 23i, and the amount of the vernier line 23i, and the amount of the splayed line 2b, which also includes the horizontal line 2H). The distance value obtained (the shooting system and the object to be tested are in the ::: example, the shooting system _ can be fixed on a machine base. Figure 5 is the same as the frame of the machine base. As shown in the figure, If the lens 410 is solid

Ο 疋 lens, Uit over-axis shooting system _, to achieve the purpose of the displacement lens. When the shooting system 400 contacts the switch sB, the pixel value corresponding to the two points to be measured can be known through the debt testing module 432. When the shooting system is shifted to the right by the distance of Ah, the switch will be triggered. At this time, the detection module 432 is used to know the other pixel value corresponding to the two points to be measured. Since the distance Ah is a fixed value and can be known in advance, the value of the distance Ah can be stored in the operation module 433, so that the operation module 433 knows the shooting system according to the formulas (5) and (6). The distance from the object to be tested. Figure 6a is a possible embodiment of one of the setting modules. As shown, the setting module 431 has a scan line setter 611 and a scan line controller 612. The scan line controller 612 can provide N scan signals based on the image signal V01 supplied from the photosensitive element 420. Scan setter 611 is used to enable one of the n scan signals. The scan controller 612 then outputs the kth scan of the scan setter 611 to enable the kth scan line to be reversed. In this embodiment, the scan line setter 611 is based on the adjustment signal 15 200839192

Sav, one of the N scan signals enabled. In other embodiments, scan line setter 611 can be fixed to enable one of the N scan signals. For example, the scan line setter 611 fixes the signal that enables the 10th scan line. Figure 6b is a possible embodiment of a detection module. As shown in the figure, the position controllers 621 and 623 detect the pixel values M1 and MR corresponding to the two points to be measured. Taking Fig. 2a as an example, before the lens shift, the pixel value M1 detected by the position controller is the first pixel value, and the pixel value MR detected by the position controller 623 is the second pixel value. 〇 After the lens is displaced, the pixel value M1 detected by the position controller 621 is the third pixel value, and the pixel value Mr prepared by the position controller (2) is the fourth pixel value. The operation module 433 further knows the distance between the photographing system and the object to be tested based on the first, second, third, and fourth pixel values and the lens shift amount M. In the present embodiment, the detection module 432 sets the vernier lines 231 and 232 in the kneading surface 200 by the comparators 624 and 625, and controls the vernier lines 231 and 232 to intersect the horizontal line 210 at the point to be measured 211. And 212. In its embodiment, the setting module 431 can be used to generate the punctuation point or the vernier line as shown in the second &amp; figure, and the detection module 432 or a user\ can control the cursor point or the vernier line. s position. At the beginning of each scan line, the pixel value NP output by the pixel controller 622 starts counting from 0 until the end of the scan line (NP = Nmax). When the pixel value ML or Mr is equal to the pixel value 输出 output by the pixel control (4) milk, the comparator 624 "milk will enable the scan signal or vEQ2. Therefore, the image signal of "2008" will be generated in the pixel value of the scan line. When all the scan lines produce a "reverse" image signal at the pixel values ML and Mr, a "reverse white" line of two vertical kth scan lines is generated, that is, the cursor line 231 in FIG. 2a. And 232. Figure 0C shows one possible embodiment of the nose module. As shown, the arithmetic module 433 includes a subtractor 631, a microprocessor 632, a character storage memory 633, and a processing unit 634. The subtracter 631 is configured to know the difference between the pixel values ML&amp; MR corresponding to the two points to be measured.假设 Assume that when the shooting system is mounted on the mechanism as shown in Figure 5, when the switch sB is triggered, it indicates that the lens has not moved. Since the pixel values ML and MR received by the subtracter 631 are the first and second pixel values, respectively, the microprocessor 632 first receives the calculation result of the subtracter 63ι. When the switch ^ is triggered, it indicates that the lens has been moved by the distance Ah. Since the pixel values received by the subtracter 631 are the third and fourth pixel values respectively, the microprocessor 632 calculates the calculation result received at this time and the calculation received last time. The result is processed according to the formulas (5) and (6), and the processed result is stored in the character storage memory 633, so that the display device 45 呈现 presents the data stored in the memory 70 (4) of the word 70. In the picture. Therefore, the user can know the distance between the shooting system and the object to be tested from the screen. /,,,; this month has been disclosed in the preferred embodiment as the upper limit ^ invention, any person with ordinary knowledge in the technical field in the spirit and scope of the field, if you can make some changes and retouching The scope of protection of the invention is defined as the scope defined by the scope of the patent. 17 200839192 [Simplified description of the drawings] Fig. 1 is a flow chart of the measurement method of the present invention. 2a to 2c are schematic views of the measuring method of the present invention. Figure 3a is a schematic diagram of measuring the distance hs between the photosensitive element and the lens. Figure 3b is a schematic diagram of measuring the actual distance between two points to be measured. Figure 4 is a possible embodiment of the photographing system of the present invention. Figure 5 is a schematic view of the base. Figure 6a is a possible embodiment of one of the setting modules. 〇 Figure 6b shows a possible embodiment of the detection module. Figure 6c is a possible example of a computing module. [Description of main component symbols] 200, 201: screen; • 210: horizontal line; 211, 212: point to be measured; 221, 222: cursor point; ◎ 231, 232: vernier line; 310, 320: scale; 330: digital Camera; 331, 410: lens; 332, 420: photosensitive element; 400: shooting system; 430: measuring device; 431: setting module; 432: detecting module; 18 200839192 433 ·• computing module; Processor; 450: display device; 611: scan line setter; 612: scan line controller; 621, 623: position controller; 622: pixel controller; 624, 625: comparator; ^ 631: subtractor; · microprocessor; 633: character storage memory; 634: processing unit. h, h2, hs, Z\h,,: distance; D (h〇, D(h2): maximum horizontal distance;

PaOii), pa(h2), PbOM), PdhD: pixel value; N(h〇, N(h2): image difference value; 〇 Nmax: total pixel value; : angle;

Claims (1)

200839192 X. A patent scope: 1. A measurement method for measuring the distance between a squad, the shooting system and one or two shooting system and the object to be tested U lens, an image processing Displaying the image processing device to process the 4 images captured by the lens, so that the payment is not presented to the device, the measurement method, including: in the facet, presenting a horizontal line, wherein the water is in the image One of the first and second points to be tested; when the lens is kept with the article - the first (hl), it is known U and the second point to be measured correspond to one of the faces (Pa(h!), purchase); and the pixel value of the brother is changed in the case where the height between the photographing system and the ground is constant, and the lens is changed The distance between the objects to be tested; when the lens is kept with the object to be tested - the second distance (h2), and the second point to be measured corresponds to the written (Pa(h2). Pb(h2)); The first and the fourth four pixel values are calculated according to a distance difference (Ah) between the first and second distances, and the distance between the photographing system and the object to be tested is calculated. 2. The measuring method according to claim 1, wherein the step of measuring the nose comprises: calculating a first difference (N(hi)) between the first and second pixel values; a second difference between the third and fourth pixel values (N(h2)); °10#°H first, the first difference, and the distance difference, and the shooting system and the object to be tested are known the distance between. 3. The measuring method according to claim 2, wherein the first 20 200839192 distance (8) is a release ο x Ah; the towel NOn) is the first difference, and N (h2) is the second The difference is the distance difference. 4. The measuring method according to claim 2, wherein the second distance (h2) is; wherein _) is the first difference 'N(h2) is the second difference, and Δ1ι is the distance Difference. 5. The method of measuring according to item 1 of the patent application, further comprising: setting a first and second cursor point on the horizontal line; The first and second cursor points are adjusted such that the first and second cursor points are located at the first and second points to be tested, respectively. 6. The method of measuring according to the scope of claim 2, further comprising: 々 setting a first and second vernier lines in the face, wherein the first and first vernier lines are perpendicular to the horizontal line; The first and second vernier lines are erected such that the first and second vernier lines intersect the first and second points to be tested, respectively. The measuring method according to claim 1, wherein when the distance between the lens and the image processing device is a fixed value, the camera system and the object to be tested are changed. a distance that causes the lens to maintain the second distance from the object to be tested. 8. The method of measuring according to claim 7 of the patent application, further comprising: measuring a first maximum horizontal distance that the photographing system can capture when the photographing system maintains a third distance from a measuring ruler乂 moving the scale; when the photographing system maintains a fourth distance from the scale, measuring the second maximum horizontal distance that the beat 21 200839192 camera system can capture; and calculating the first and second maximum levels The distance and the third and fourth distances ' are used to know the fixed value. Distance, h m2 9 · The measurement method described in claim 8 wherein the fixed value (hs) is &amp; D 2 -h~; wherein hmi is the ', &quot; Dm\ ^Dml For the fourth distance, Dml is the first maximum horizontal distance, and Dm2 is the second maximum horizontal distance (J10) The measuring method of claim 8, further comprising: learning that the lens captures an angle of the image; calculating the fixed value, the first and second points to be measured, and the shooting The distance between the systems and the angle to know the distance between the first and fourth points to be measured between the first and second points to be measured &quot;] is i 1 - centering; The first distance, 匕 is the fixed 11. The measuring method according to the first aspect of the patent application, wherein the 2{hx +hsy rmax value, NOn) is one between the first and second pixel values. The first difference, n is the total pixel value of the horizontal line corresponding to the face, which is known as the angle. 12 • The measurement method described in item i of the patent application is as follows: the first and second points to be measured are the two ends of an object included in the image. Λ 13. For the measurement method described in the scope of patent application, the first and second points to be measured are the two objects included in the image. Λ 14. If the measurement described in item i of the patent application is adjusted, the distance between the camera system and the ground is adjusted so that the horizontal line passes through the first and second points to be tested. The measuring method of claim 1, further comprising presenting the shooting line, the distance between the objects to be tested, in the kneading surface. Two measuring devices for measuring - the shooting system and the object to be tested, the camera system having a lens, a photosensitive element, a processing unit, and a 'photosensitive element sensing the image captured by the system The first image signal is generated, the processor is in the second image signal 以 U to generate-process (4), the display device presents a picture according to the processed signal, and the measuring device comprises: - setting mode a group-providing---scanning signal for presenting a horizontal line in the pupil plane, the horizontal line simultaneously passing through one of the first and second points to be tested of the image; - debt testing module ' &gt; a pixel value corresponding to the first and second points to be measured; and an operation module, calculating a distance between the photographing system and the object to be tested according to the detection result of the detecting module, and processing The first scan signal and the first image signal are used to generate the second image signal. The measuring device of claim 16, wherein the detecting module detects the first when the distance between the lens and the first and second points to be tested is not changed. And the pixel values corresponding to the second point to be measured are respectively a first and second pixel values; when the distance between the lens and the first and second points to be tested is changed, the detecting module The first and second points to be tested are detected to correspond to pixel values of the screen as a third and fourth pixel values. 18. The measuring device according to claim 17, wherein the 23 200839192 computing module knows the photographing system and the object to be tested according to the first to fourth pixel values and the distance that the lens is changed. the distance between. 19. The measuring device of claim 18, wherein the distance at which the lens is changed is a fixed value. 20. The measuring device of claim 19, wherein the fixed value is stored in the computing module. The measuring device of claim 17, wherein the setting module provides a first and second cursor point in the face. The measuring device of claim 17, wherein the detecting module provides a first and second cursor point in the picture. The measuring device of claim 22, wherein the detecting module controls the first and second cursor points such that the first and second cursor points overlap the first and second to be tested point. 24. The measuring device of claim 22, wherein the user controls the first and second cursor points such that the first and second cursor points overlap the first and second points to be tested . The measuring device of claim 17, wherein the detecting module provides a first and second vernier lines in the face. 26. The measuring device of claim 25, wherein the detecting module controls the first and second vernier lines respectively such that the first and second vernier lines respectively intersect the horizontal line at the first One and second points to be tested. 27. The measuring device of claim 25, wherein a user controls the first and second vernier lines respectively such that the first and second vernier lines respectively intersect the horizontal line at the first and The second point to be tested. The measuring device of claim 16, wherein the distance between the photographing system and the object to be tested is present in the kneading surface. A shooting system comprising: a lens for capturing an image; a photosensitive element sensing the image to generate a first image signal; and a measuring device comprising: a setting module providing a first a scanning signal for presenting a horizontal line in the picture, the horizontal line simultaneously passing through one of the first and second points to be tested; and a detecting module detecting the pair of first and second points to be tested The pixel value of the face should be; and - an operation module, according to the detection result of the detection module, the distance between the shooting system and the first and second points to be tested is known, and the first And scanning the signal and the first image signal to generate a first image signal; and a processor, according to the second image signal group, generating a display device, and presenting a face according to the processed signal. ^30. The photographing system of claim 29, wherein when the distance between the X lens and the δHaiyi and the first point to be tested is not changed, the = pull group detects the first The pixel values corresponding to the first and second points to be measured are respectively a first and second pixel values; when the distance between the lens and the first and second points to be measured is changed, the detection mode The group detects that the pixel values of the first and second points to be tested correspond to a third and fourth pixel values. 25 200839192 31. If the operation scope of the patent application scope is based on the first to fourth pixel values and the deviation, the distance between the shooting system and the object to be tested is changed. Wherein the 32. The distance in which the photographing lens described in claim 31 of the patent application is changed is a fixed value. ',, and first 33. The fixed value as described in item 32 of the patent application scope is stored in the arithmetic module.糸, Ο Ο Ο 34. If the shooting setting module described in 申请30申请 application provides - the first and second cursor points in the screen, ,,, 35. If the patent application scope is 帛3〇 Said to shoot. The detection module provides - the first and second cursor points in the face, ,,, 36. The shooting detection module according to claim 35 controls the first and second cursor points, The second and second two punctuation points are overlapped with the first and second points to be tested. A trip to the younger brother 37. In applying for the shooting system described in item 35 of the full-time division, one of the users controls the first and second cursor points such that the first point overlaps the first and second points to be tested.夂弟-私私 38. As claimed in the third aspect of the patent application, the detection module provides a first and second vernier line in the face. VIII. The photographing system of claim 38, wherein the detecting module controls the first and second vernier lines respectively, so that the first and second vernier lines are respectively interlaced with the horizontal line. The first _ another flute two long music two to be tested H; 40. The photographing system of claim 38, wherein a user controls the first and second vernier lines respectively such that the Α^ and 26200839192 vernier lines are respectively interlaced with the horizontal line at the first and The second point to be tested. The photographing system of claim 29, wherein a distance between the photographing system and the object to be tested is present in the kneading surface. 42. The photographing system of claim 29, wherein the display device is a liquid crystal display. 43. The photographing system of claim 29, wherein the photosensitive element is a charge coupled device (CCD) or a complementary metal oxide semiconductor (Complementray®) Metal-Oxide Semiconductor; CMOS) 〇u 27