Light source module and operation method therefor

Abstract

A light source module (100) and an operation method for the light source module (100). The light source module (100) comprises a test platform (110), a camera (120), and a plurality of light sources (130). The test platform (110) is configured to place an object to be tested (112). The camera (120) is arranged above the test platform (110). The camera (120) is configured to face a test surface (1122) of said object (112). The line from the position of the camera (120) to the position of said object (112) is defined as a central axis (C). The plurality of light sources (130) are provided between the test platform (110) and the camera (120) and are arranged around the central axis (C). The light sources (130) have different angles and orientations relative to the test surface (1122).

Description

Light source module and method of operating the same TECHNICAL FIELD

[0001] The present disclosure relates to a light source module and a method of operating the same, in particular, a light source module with automation function. BACKGROUND

[0002] In the field of light source module for detecting an object, the current practice is to manually select the light source hardware configuration and adjust the lighting parameters. When the object is replaced or the detection requirement changes, the light source hardware configuration cannot be flexibly adjusted. In addition, manual adjustment and testing of lighting parameters require time and manpower. The effect of manual adjustment of hardware and adjustment of lighting parameters cannot be quantified, and the quality is difficult to improve. The current light source hardware also cannot quickly adjust the parameters in detail according to the properties of the object or the detection requirements.

[0003] Therefore, how to provide a light source module and a method of operating the same to improve the above-mentioned shortcomings is still one of the directions that need to be researched. SUMMARY

[0004] An embodiment of the present disclosure is a light source module.

[0005] In an embodiment, the light source module includes an object platform, a camera, and a plurality of light sources. The object platform is configured to place an object. The camera is disposed above the object platform. The camera is configured to face a detection surface of the object. The position of the camera to the position of the object defines a central axis. The plurality of light sources is disposed between the object platform and the camera and arranged around the central axis. The light sources have different angles and orientations relative to the detection surface.

[0006] In an embodiment, the light sources each have a first distance relative to the camera, and each of the light sources has a second distance relative to the central axis, wherein the second distance increases as the first distance increases.

[0007] In an embodiment, the light sources each have a first distance relative to the camera, and each of the light sources has an emission surface, a normal direction of the emission surface forms an inclination angle with the central axis, and the inclination angle decreases as the first distance decreases.

[0008] In an embodiment, the light sources form a plurality of closed ring light sources.

[0009] In an embodiment, the position of the camera to the position of the object defines a central axis, and the ring light sources are arranged around the central axis and along a first direction in which the central axis extends.

[0010] In an embodiment, the ring light sources comprise at least a first ring light source, a second ring light source, and a third ring light source, wherein the first ring light source is positioned between the camera and the second ring light source, the third ring light source is positioned between the object and the second ring light source, and the vertical projection of the first ring light source on the object platform is smaller than the vertical projection of the second ring light source on the object platform.

[0011] In an embodiment, the vertical projection of the second ring light source on the object platform is smaller than the vertical projection of the third ring light source on the object platform.

[0012] In an embodiment, the light source module further comprises a mechanical arm connecting the light sources and the camera, wherein the mechanical arm is configured to adjust the angle of the camera and the light sources relative to the detection surface.

[0013] In an embodiment, the light source module further comprises a support detachably connecting the light sources.

[0014] In an embodiment, the light source module further comprises a host and a microprocessor. The microprocessor is electrically connected to the host, wherein the microprocessor is configured to control at least one of the switching state, the brightness, and the color of the light sources.

[0015] In an embodiment, the light source module further comprises a motorized slide connecting the light sources and electrically connected to the microprocessor, wherein the motorized slide is configured to adjust the distance and the angle of the light sources relative to the camera.

[0016] Another embodiment of the present disclosure is a method for operating a light source module.

[0017] In an embodiment, the method for operating the light source module comprises outputting a first configuration combination of the light sources by the host according to a searching algorithm; controlling the light sources to irradiate the detection surface of the object by the microprocessor according to the first configuration combination; capturing an image of the detection surface by the camera; calculating parameters of the image by the host; and searching for a second configuration combination according to the parameters of the image by the host.

[0018] In an embodiment, calculating the parameters of the image by the host comprises calculating the parameters of the image according to a quantification algorithm, wherein the parameters comprise at least one of the relative brightness, the absolute brightness, the contrast, the uniformity, and the sharpness.

[0019] In an embodiment, the method for operating the light source module further comprises calculating a quantification score according to the parameters by the host; when the quantification score is lower than a threshold value, searching for a second light source configuration by the searching algorithm and controlling the light sources to irradiate the detection surface of the object according to the second configuration combination by the microprocessor; and when the quantification score is higher than the threshold value, ending the method.

[0020] In an embodiment, the first configuration combination comprises at least one of the position, the tilt angle, the brightness, the color, the switching state of the light sources, and the distance between the light sources.

[0021] In an embodiment, the searching algorithm includes gradient descent method, Newton method, genetic algorithm, particle swarm algorithm, simulated annealing method.

[0022] In an embodiment, the operation method of the light source module further includes selecting a searching algorithm according to the property of the object to be measured.

[0023] In an embodiment, the operation method of the light source module further includes adjusting the position of the light source by the detachable support.

[0024] In an embodiment, the operation method of the light source module further includes adjusting the angle of the camera and the light source relative to the detection surface by the mechanical arm.

[0025] In an embodiment, the operation method of the light source module further includes adjusting the distance of the light source relative to the camera by the electric slide rail.

[0026] The light source module of the present disclosure can change according to the detection requirement of the detection surface of the object to be measured or the replacement of the object to be measured, and automatically change the configuration of the light source by the host and the microprocessor for shooting and calculation. The plurality of light sources of the light source module of the present disclosure have independent light source tilt angles, orientations, brightnesses, colors, switching states, and distances from each other, which can quickly adapt to the required lighting requirements without manual adjustment test. The operation method of the present disclosure can automatically feed back the parameters and quantitative scores calculated by the quantitative algorithm to the searching algorithm, and then obtain a better light source configuration combination without changing the hard equipment. In this way, the disadvantages of manual adjustment error and non-quantitative image interpretation can be avoided. In addition, the microprocessor can independently control the plurality of light sources, which is beneficial to quickly adjust the parameters in detail according to the property or detection requirement of the object to be measured. BRIEF DESCRIPTION OF DRAWINGS

[0027] FIG. 1 is a schematic diagram of a light source module according to an embodiment of the present disclosure;

[0028] FIG. 2 is a schematic diagram of the light source module of FIG. 1 in different states;

[0029] FIG. 3A is a schematic diagram of a light source of FIG. 1;

[0030] FIGS. 3B to 3C are schematic diagrams of light sources according to different embodiments of the present disclosure;

[0031] FIG. 4 is a schematic diagram of a camera, a light source, and an object to be measured according to another embodiment of the present disclosure;

[0032] FIG. 5 is a schematic diagram of a camera, a light source, and an object to be measured according to another embodiment of the present disclosure;

[0033] FIG. 6 is a schematic diagram of a camera, a light source, and an object to be measured according to another embodiment of the present disclosure;

[0034] FIG. 7 and FIG. 8 are schematic diagrams of intermediate steps in a method of operating a light source module according to an embodiment of the present disclosure;

[0035] FIG. 9 is a flowchart of a method of operating a light source module according to an embodiment of the present disclosure.

[0036] BRIEF DESCRIPTION OF DRAWINGS 100: light source module 110: object platform 112: object 1122: detection surface 120: camera 130, 130a, 130b, 130c: light source 132, 132a, 132b, 132c: first ring-shaped light source 132S, 134S, 136S: light exit surface 1322: first section 1324: second section 134, 134a, 134b, 134c: second ring-shaped light source 136, 136a, 136b, 136c: third ring-shaped light source 138, 138a, 138b: support 140: host computer 150: microprocessor 160, 162: motorized slide 170: robotic arm C: center axis D1: first direction D2: second direction DS1: first distance DS2: second distance N1, N2, N3: normal direction Θ: tilt angle 200: method of operation 210, 220, 230, 240, 250: first configuration combination 260: second configuration combination IM1, IM2: image P1, P2, P3, P4, P5: parameter W1, W2, W3, W4, W5: weight S1, S2, S3, S4, S5, S6, S7: step DETAILED DESCRIPTION

[0037] Embodiments of the present disclosure will be described below with reference to the drawings. For the purpose of explanation, numerous specific details will be set forth in the following description in order to provide a thorough understanding of the embodiments. It will be appreciated, however, that these specific details are not intended to limit the present disclosure.

[0038] FIG. 1 is a schematic diagram of a light source module 100 according to an embodiment of the present disclosure. The light source module 100 includes an object platform 110, a camera 120, a plurality of light sources 130, a host computer 140, a microprocessor 150, and a motorized slide 160. The object platform 110 is configured to hold an object 112. The object 112 has a detection surface 1122 facing the camera 120 and the light sources 130. The camera 120 is disposed above the object platform 110. The camera 120 is directed toward the detection surface 1122 of the object 112. This embodiment uses three light sources as an example, but the present disclosure is not limited thereto.

[0039] The light source 130 is disposed between the object platform 110 and the camera 120. The plurality of light sources 130 can have different angles and orientations with respect to the detection surface 1122, respectively. The position of the camera 120 to the position of the object 112 defines a central axis C. The plurality of light sources 130 in the present embodiment is arranged around the central axis C, and the position of the object 112 is substantially aligned with the central axis C.

[0040] In the present embodiment, the light source 130 and the camera 120 are connected by the motorized slide rail 160, and the distance of the camera 120 to the light source 130 is adjustable. In the present embodiment, the motorized slide rail 160 connects one of the light sources 130 closest to the camera 120, but the present disclosure is not limited thereto. The microprocessor 150 is electrically connected to the host 140. The microprocessor 150 is configured to control the brightness, color, tilt angle, and switching state of the light source 130. Each of the plurality of light sources 130 has a light-emitting diode that can be used to emit, for example, red light, green light, blue light, or white light, but the present disclosure is not limited thereto.

[0041] FIG. 2 is a schematic diagram of the light source module 100 in different states of FIG. 1. The light source module 100 further includes a robotic arm 170. The robotic arm 170 links the light source 130 and the camera 120. The robotic arm 170 is configured to adjust the angle of the camera 120 and the light source 130 with respect to the detection surface 1122. As shown, the angle between the light source 130 and the camera 120 can be adjusted synchronously with the different detection surfaces 1122.

[0042] FIG. 3A is a schematic diagram of the light source 130 of FIG. 1. In the present embodiment, the plurality of light sources 130 is composed of a plurality of closed ring light sources, but the present disclosure is not limited thereto. The closed ring light sources are a first ring light source 132, a second ring light source 134, and a third ring light source 136, respectively. The first ring light source 132, the second ring light source 134, and the third ring light source 136 are detachably connected by a support 138. In the present embodiment, the light source 130 is circular, but the present disclosure is not limited thereto. In other embodiments, the first ring light source 132, the second ring light source 134, and the third ring light source 136 can be one or a combination of a square, a rectangle, an ellipse, a polygon, or an irregular shape.

[0043] FIGS. 3B-3C are schematic diagrams of the light source according to different embodiments of the present disclosure. The length of the support 138 is adjustable. As shown in FIG. 3B, a shorter support 138a can reduce the distance between the first ring light 132 and the second ring light 134 and the distance between the second ring light 134 and the third ring light 136. As shown in FIG. 3C, a longer support 138b can increase the distance between the first ring light 132 and the second ring light 134 and the distance between the second ring light 134 and the third ring light 136. In other embodiments, the supports 138, 138a, 138b can be combined to control the distance between the light sources 130.

[0044] FIG. 4 is a schematic diagram of the camera 120, the light source 130, and the object 112 according to another embodiment of the present disclosure. In this embodiment, the light source 130 can be connected to another motorized slide 162. The motorized slide 162 is connected to the second ring light 134 to adjust the position of the second ring light 134 in the first direction Dl. In other embodiments, the third ring light 136 can also be connected to an additional motorized slide (not shown).

[0045] The first ring light 132, the second ring light 134, and the third ring light 136 are arranged around and along the first direction Dl of the central axis C. By connecting at least one of the first ring light 132, the second ring light 134, and the third ring light 136 to the motorized slide 162, the distance between the light sources 130 in the first direction Dl and the distance relative to the object 112 and the camera 120 can be controlled by the host 140 and the microprocessor 150.

[0046] The motorized slide 160 as shown in FIG. 1 can also be used in this embodiment to adjust the elevation, azimuth, and distance of the light source 130 relative to the object 112 by the motorized slide 162 according to the detection requirements of the detection surface 1122 of the object 112 by the microprocessor 150.

[0047] In this embodiment, the diameter of the ring light closer to the camera 120 is smaller. In other words, the vertical projection of the first ring light 132 on the object platform 110 is smaller than the vertical projection of the second ring light 134 on the object platform 110. The vertical projection of the second ring light 134 on the object platform 110 is smaller than the vertical projection of the third ring light 136 on the object platform 110.

[0048] Fig. 5 is a schematic diagram of the camera 120, the light source 130b and the object 112 according to another embodiment of the present disclosure. In this embodiment, the first ring light 132b, the second ring light 134b and the third ring light 136b of the light source 130b each comprises a plurality of regions. Each region can have different color, brightness, tilt angle and switching state. For example, the first region 1322 and the second region 1324 of the first ring light 132b can be different, such as red and blue respectively, and have different brightness.

[0049] Each light source 130 has a first distance DS1 with respect to the camera 120. A second direction D2 perpendicular to the first direction D1 is defined with respect to the detection surface 1122. Each light source 130 has a second distance DS2 along the second direction D2 with respect to the central axis C. The second distance DS2 increases as the first distance DS1 increases. In other words, the farther the light source 130 from the camera 120, the farther the light source 130 from the central axis C.

[0050] Each of the light sources 130 has an emission surface with a normal direction forming a tilt angle θ with the central axis C, and the tilt angle θ decreases as the first distance DS1 decreases. As shown, the emission surface 132S of the first ring light 132b faces downward, and the normal direction N1 is parallel to the first direction D1 along which the central axis C extends. The emission surface 134S of the second ring light 134b is tilted toward the object 112, and the tilt angle θ between the normal direction N2 and the central axis C is about 45 degrees. The emission surface 136S of the third ring light 136b faces the side of the object 112, and the normal direction N3 is nearly perpendicular to the central axis C, which corresponds to a tilt angle θ of about 90 degrees. In other words, the closer the light source to the camera 120, the closer the normal direction of the corresponding emission surface to the first direction D1 along which the central axis C extends.

[0051] According to the above, the light source module 100 of the present disclosure can automatically change the configuration of the light sources 130 by the host 140 and the microprocessor 150 for shooting and calculation according to the detection requirement of the detection surface 1122 of the object 112 or the replacement of the object 112. The shooting and calculation process will be described in detail in the subsequent operation method. The plurality of light sources of the light source module 100 of the present disclosure have independent light source tilt angle, orientation, brightness, color, switching state and distance from each other, which can quickly adapt to the required illumination requirement without manual adjustment test.

[0052] FIG. 6 is a schematic diagram of the camera 120, the light source 130c, and the object 112 according to another embodiment of the present disclosure. In this embodiment, the first ring light 132c, the second ring light 134c, and the third ring light 136c of the light source 130c are not closed rings, and each has a plurality of segments separated by a distance. The light source 130c has the same technical effects as the light source 130 of the previous embodiments, and will not be described again.

[0053] It should be understood that the component connection relationship, materials, and effects described above will not be repeated. In the following description, the operation method applied to the light source module will be described.

[0054] FIGS. 7 and 8 are schematic diagrams of intermediate steps of the operation method of the light source module according to an embodiment of the present disclosure. FIG. 9 is a flowchart of the operation method 200 of the light source module according to an embodiment of the present disclosure. Referring to FIGS. 1, 7, and 9, the operation method 200 starts at step S1, and the host 140 outputs a plurality of first configuration combinations 210 of the light sources according to a search algorithm. The configuration combination can include the position, the tilt angle, the brightness, the color, the on-off state of the light source 130, and the distance between the light sources.

[0055] The search algorithm can include gradient descent, Newton method, genetic algorithm, particle swarm optimization, simulated annealing, etc., but the present disclosure is not limited thereto. Gradient descent and Newton method are traditional optimization methods. Genetic algorithm and particle swarm optimization are evolutionary algorithms. In some embodiments, the search algorithm can be selected according to the properties of the object 112. For example, when edge detection is performed on the object 112, because the sharpness and brightness of the edge are in a gradient relationship, a traditional optimization algorithm can be selected. When defect detection is performed on the object 112, an evolutionary algorithm can be used to find the global extremum. In the case where the object 112 has not yet been used with any configuration combination, the search algorithm can randomly initialize one or more first configuration combinations, such as the first configuration combinations 210, 220, 230, 240, 250, etc., and then proceed to the subsequent steps.

[0056] Referring to FIG. 1, FIG. 7 and FIG. 9. The operation method 200 continues to step S2, in which the microprocessor 150 controls the light source 130 to irradiate the detection surface 1122 of the object 112 according to the first configuration combination 210. In this step, the host 140 transmits the instruction of the first configuration combination 210 to the microprocessor 150, and the microprocessor 150 translates the instruction into the control signal of the light-emitting diode and the driving signal of the motorized slide rails 160, 162 (see FIG. 4). The control signal of the light-emitting diode can be used to control the brightness, color, on-off state, etc. of the light source 130. The driving signal can make the motorized slide rails 160, 162 adjust the tilt angle and distance of the light source 130 relative to the camera 120. As mentioned above, in the initial stage, the light source 130 can be controlled according to a plurality of first configuration combinations 210, 220, 230, 240, 250, respectively.

[0057] In some embodiments, this step can also include adjusting the position of the light source 130 by the detachable bracket 138. In some embodiments, this step can also include adjusting the angle of the camera 120 and the light source 130 relative to the detection surface 1122 by the mechanical arm 170.

[0058] Referring to FIG. 1, FIG. 8 and FIG. 9. The operation method 200 continues to step S3, in which the camera 120 captures the image of the detection surface 1122. In this embodiment, two different first configuration combinations are taken as examples, and the images IM1 and IM2 of the detection surface 1122 are captured respectively.

[0059] Referring to FIG. 1, FIG. 7 and FIG. 9. The operation method 200 continues to step S4, in which the host 140 calculates a plurality of parameters P1, P2, P3, P4, P5 and the quantitative score of the images IM1, IM2. For example, the parameters P1, P2, P3, P4, P5 are the relative brightness, absolute brightness, contrast, uniformity and sharpness, respectively, but the present disclosure is not limited thereto. In this step, it also includes calculating the quantitative score according to the quantification algorithm by the host 140. For different detection needs, each parameter P1, P2, P3, P4, P5 can have different weights W1, W2, W3, W4, W5, respectively. For example, when the object 112 is a metal sample, the uniformity has a higher weight to reduce the influence of the characteristic that the metal surface is easy to reflect light. When detecting scratches on the object 112, the contrast has a higher weight to improve the scratch detection effect. For different regions on the detection surface 1122, different weights W1, W2, W3, W4, W5 can be assigned. As shown in the figure, the quantitative score of the image IM1 calculated according to the above method is 95 points, and the quantitative score of the image IM2 calculated according to the above method is 0 points.

[0060] Referring to FIG. 1, FIG. 7 to FIG. 9. The operation method 200 continues to step S5, in which the host 140 compares the quantification score with a pre-set threshold value. When the quantification score is higher than the threshold value, the operation method 200 ends. The configuration combination obtained at this time is the optimal configuration of the light source 130 for the object 112.

[0061] Referring to FIG. 1, FIG. 7 to FIG. 9. When the quantification score is lower than the pre-set threshold value, the operation method 200 continues to step S6, in which the host 140 searches for a second configuration combination 260 according to the parameters P1, P2, P3, P4 and P5. As shown in FIG. 7, the searching algorithm searches for the second configuration combination 260 that can improve the quantification score according to the images IM1 and IM2 and the calculated quantification score.

[0062] Referring to FIG. 1 and FIG. 9. The operation method 200 continues to step S7, in which the microprocessor 150 controls the light source 130 to irradiate the detection surface 1122 of the object 112 according to the second configuration combination 260. The way of controlling the light source 130 is the same as that in step S2, which is not described herein again. After step S7, steps S3 to S5 are repeated until the quantification score is higher than the threshold value. The configuration combination obtained at this time is the optimal configuration of the light source 130 for the object 112.

[0063] In summary, the operation method of the present disclosure can automatically feed back the parameters and the quantification score calculated by the quantification algorithm to the searching algorithm, and then obtain a better light source configuration combination without changing the hardware. In this way, the disadvantages of manual adjustment error and non-quantifiable image interpretation can be avoided. In addition, the microprocessor can independently control multiple light sources, which is beneficial to quickly and finely adjust the parameters according to the properties of the object or the detection requirements.

[0064] Although the present disclosure has been disclosed in the above embodiments, it is not intended to limit the present disclosure, and any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present disclosure, therefore the protection scope of the present disclosure shall be subject to the scope defined by the appended claims.

Claims

1. A light source module, characterized by A testing system comprising: a testing platform configured to place a testing object thereon; a camera disposed above the testing platform, wherein a position of the camera to a position of the testing object defines a central axis; and a plurality of light sources disposed between the testing platform and the camera and arranged around the central axis, wherein the plurality of light sources have different angles and orientations relative to a detection surface of the testing object.

2. The light source module according to claim 1, characterized in that, wherein each of the plurality of light sources has a first distance relative to the camera, and each of the plurality of light sources has a second distance relative to the central axis, wherein the second distance increases as the first distance increases.

3. The light source module according to claim 1, characterized in that, wherein each of the plurality of light sources has a first distance relative to the camera, and each of the plurality of light sources has an emission surface, a normal direction of the plurality of emission surfaces forms an inclination angle with the central axis, and the inclination angle decreases as the first distance decreases.

4. The light source module according to claim 1, characterized by wherein the plurality of light sources form a plurality of closed ring light sources.

5. The light source module according to claim 4, characterized in that, wherein the position of the camera to the position of the testing object defines a central axis, and the plurality of ring light sources are arranged around the central axis and along a first direction extending along the central axis.

6. The light source module according to claim 4, characterized by wherein the plurality of ring light sources comprises at least a first ring light source, a second ring light source, and a third ring light source, wherein the first ring light source is positioned between the camera and the second ring light source, the third ring light source is positioned between the testing object and the second ring light source, and a vertical projection of the first ring light source on the testing platform is smaller than a vertical projection of the second ring light source on the testing platform.

7. The light source module according to claim 6, characterized in that wherein a vertical projection of the second ring light source on the testing platform is smaller than a vertical projection of the third ring light source on the testing platform.

8. The light source module of claim 1, wherein further comprising: a robotic arm connected to the plurality of light sources and the camera, wherein the robotic arm is configured to adjust angles of the camera and the plurality of light sources relative to the detection surface.

9. The light source module of claim 1, wherein further comprising: a support removably connected to the plurality of light sources.

10. The light source module of claim 1, wherein further comprising: a host; and a microprocessor electrically connected to the host, wherein the microprocessor is configured to control at least one of switching states, brightness, and colors of the plurality of light sources.

11. The light source module according to claim 10, characterized by further comprising: a motorized slide connected to the plurality of light sources and electrically connected to the microprocessor, wherein the motorized slide is configured to adjust distances and angles of the plurality of light sources relative to the camera.

12. A method of operating a light source module, characterized by comprising: outputting, by a host, a first configuration combination of a plurality of light sources according to a searching algorithm; controlling, by a microprocessor, the plurality of light sources to irradiate a detection surface of a testing object according to the first configuration combination; capturing, by a camera, an image of the detection surface; calculating, by the host, a plurality of parameters of the image; and searching, by the host, a second configuration combination according to the plurality of parameters of the image. wherein calculating, by the host, the plurality of parameters of the image comprises:

13. The operating method of the light source module according to claim 12, characterized in that, calculating the plurality of parameters of the image according to a quantification algorithm, wherein the plurality of parameters comprises at least one of relative brightness, absolute brightness, contrast, uniformity, and sharpness. further comprising:

14. The operating method of the light source module according to claim 13, characterized by, calculating, by the host, a quantification score according to the plurality of parameters. ​ when the quantification score is lower than a threshold, searching the second configuration combination by the searching algorithm, and controlling the plurality of light sources to irradiate the detection surface of the object under test according to the second configuration combination by the microprocessor; and when the quantification score is higher than the threshold, ending the operation method.

15. The method of operating a light source module according to claim 12, wherein, wherein the first configuration combination comprises at least one of position, tilt angle, brightness, color, on / off state of the plurality of light sources, and distance between the plurality of light sources.

16. The operating method of the light source module according to claim 12, wherein wherein the searching algorithm comprises gradient descent method, Newton method, genetic algorithm, particle swarm algorithm, simulated annealing method.

17. The operating method of the light source module according to claim 12, wherein Further comprising: selecting the searching algorithm according to the property of the object under test.

18. The operating method of the light source module according to claim 12, wherein Further comprising: adjusting the position of the plurality of light sources by a detachable support.

19. The operating method of the light source module according to claim 12, wherein Further comprising: adjusting the angle of the camera and the plurality of light sources relative to the detection surface by a mechanical arm.

20. The operating method of the light source module according to claim 12, wherein, Further comprising: adjusting the distance of the plurality of light sources relative to the camera by an electric slide rail.

Images