TWI490463B - Detecting method and detecting system for distinguishing the difference of two workpieces - Google Patents

Description

Detection method and detection system for detecting difference of two workpieces

The invention relates to a detection method and a detection system, in particular to a detection method and a detection system for detecting the difference between two workpieces.

With the advancement of industrial technology, the industry's precise requirements for various types of workpieces have become stricter. Of course, accurate measurement techniques must be developed simultaneously to truly enhance industrial technology. In the application of measurement technology, it is more often used to check or compare the two workpieces.

For example, in the process of making a workpiece, it is often necessary to carry out the mold modification due to the design change. After the mold repair, in addition to confirming whether the position to be changed is changed, it is necessary to confirm whether the structure that should remain unchanged remains intact. In turn, it is necessary to compare the two workpieces before and after the mold repair. Specifically, if it is necessary to change the acute angle of the periphery of a workpiece to an obtuse angle, it is necessary to check whether the other structures are still the same as the original workpiece after the mold is repaired, in addition to checking whether the circumference of the workpiece is an obtuse angle. However, the current workpiece confirmation before and after the mold repair is to use the human eye and slowly check. First look at the sample before the mold repair, then look at the sample after the mold repair, but often there are missing situations.

In this regard, the current solution has directly increased the manpower to help check, but in addition to increasing costs, there are still many negligence places. In addition, there are also methods of using X-ray inspection of the mold, but the cost is quite high, so it is rarely used. At present, industrial cameras are erected on a dynamic moving slide, and the repaired workpieces are taken at a plurality of different positions to obtain images of the workpieces after repairing at different angles, and then the images are correspondingly The 3D computer files are compared to check for any discrepancies. However, the cost of such a process is still quite high, and the time and detection time of moving the slide is quite a lot.

Therefore, how to design a detection method and detection system can achieve the effect of comparing the differences between different workpieces by simple devices and methods, and is an important subject for the design of the detection system.

In view of the above problems, an object of the present invention is to provide a detection method and a detection system, which can achieve the effect of comparing the differences between different workpieces by a simple device and method.

In order to achieve the above object, a detecting method according to the present invention is for detecting a difference between a first workpiece and a second workpiece, and the detecting method comprises the steps of: placing the first workpiece at a preset position of a detecting platform; The first image of the first workpiece is captured by a predetermined angle, and a first pixel data of the first image is obtained; the preset position of the second workpiece is placed on the detection platform; and the second image is captured at the preset angle a second image of the workpiece, and obtaining a second pixel data of the second image; calculating a difference between each pixel of the first pixel data and the second pixel data, and obtaining a comparison data.

In an embodiment of the invention, the detecting method further comprises: jointly outputting the comparison data with the first pixel data or the second pixel data.

In an embodiment of the invention, the detecting method further comprises: displaying the comparison data together with the first pixel data or the second pixel data in a display unit.

In an embodiment of the invention, the detecting method further comprises: binarizing the comparison data.

In an embodiment of the invention, the preset angle includes a plurality of preset angles, and the processing module compares the first pixel data and the second pixel data obtained for the same preset angle.

In an embodiment of the invention, the detecting method further comprises: reducing an opaque parameter value of the comparison data, and jointly outputting the comparison data after reducing the opacity parameter value and the second pixel data of the first pixel data.

In order to achieve the above object, a detection system according to the present invention is configured to detect a difference between a first workpiece and a second workpiece. The detection system includes a detection platform, a positioning component, at least one image capturing device, and a processing module. . The detecting platform places the first workpiece or the second workpiece. The positioning member is disposed on the detecting platform, and the positioning member fixes the first workpiece or the second workpiece to a predetermined position. Shadow The capturing device is configured to correspond to the detecting platform to capture the first image of the first workpiece and the second image of the second workpiece, and obtain a first pixel corresponding to the first image. Data, and obtaining a second pixel data corresponding to the second image. The processing module is coupled to the image capturing device, and the processing module calculates a difference between each pixel of the first pixel data and the second pixel data, and obtains a comparison data.

In an embodiment of the invention, the processing module outputs the comparison data and the first pixel data or the second pixel data.

In an embodiment of the invention, the processing module includes a display unit for collectively displaying the comparison data with the first pixel data or the second pixel data.

In an embodiment of the invention, the detecting platform comprises a metal material or a magnetic material, and the positioning component comprises a metal material or a magnetic material.

In an embodiment of the invention, the processing module binarizes the comparison data.

In an embodiment of the invention, the detecting system includes a plurality of image capturing devices respectively disposed on a first plane parallel to the detecting platform and at least one second plane perpendicular to the detecting platform to obtain a plurality of A plurality of first pixel data and a plurality of second pixel data of a preset angle.

In an embodiment of the invention, the processing module compares the first pixel data and the second pixel data obtained for the same predetermined angle.

In an embodiment of the invention, the processing module further includes: reducing the opaque parameter value of the comparison data, and the processing module outputs the comparison data and the first pixel data or the second pixel data after reducing the opacity parameter value.

In an embodiment of the invention, the detection system further includes a light source corresponding to the detection platform setting.

In an embodiment of the invention, the detection platform is disposed in a dark room.

In an embodiment of the invention, the detection platform includes a rough or matte surface.

According to the above description, the detection method and the detection system of the present case are arranged by the simple detection platform and the fixing member to respectively set the two workpieces (the first workpiece and the second workpiece) at the same preset position, and by fixing The image capturing device respectively obtains a first image corresponding to the first workpiece, and a second image corresponding to the second workpiece, and the angle and the position of the first image and the second image The settings are essentially the same. Then, the processing module directly calculates the difference between each pixel of the first pixel data of the first image and the second pixel data of the second image, and obtains the comparison data, which can be displayed by the comparison data. The image looks at the difference between the first workpiece and the second workpiece. Therefore, the present invention can achieve the effect of comparing the differences between different workpieces by simple calculation platform, positioning member and image capturing device, and processing module for simple calculation.

In addition, the comparison data may be output together with the first pixel data or the second pixel data, and the first image or the second image is used as a reference, and the compared image is overlaid on the first image. Or the second image, so that the user can more clearly see the difference between the first workpiece and the second workpiece.

In addition, the definition of the threshold value can filter out the noise that is difficult to avoid in the digital image, or the slight difference between the first workpiece and the second workpiece placed in the preset position, even the background value due to the light. Different minor differences can be used to more accurately display the difference between the first workpiece and the second workpiece.

In addition, the image capturing device can be disposed on the side of the detecting platform to take the first image or the second image acquired on the Z axis, and further, the blind hole before and after the mold clamping can be further checked for the blind hole of the workpiece. The difference in depth.

1, 1a‧‧‧ testing platform

2, 2a‧‧‧ positioning parts

3, 3a, 3b‧‧‧ image capture device

4‧‧‧Processing module

41‧‧‧Processing unit

42‧‧‧Signal Conversion Unit

43‧‧‧Display unit

5‧‧‧Shelf

6‧‧‧Lighting parts

7‧‧‧Light source

A1‧‧‧ first plane

A2‧‧‧ second plane

I ₁ ‧‧‧ first image

I ₂ ‧‧‧Second image

I _c ‧‧‧ alignment image

P1‧‧‧ first workpiece

P2‧‧‧ second workpiece

S‧‧‧Detection System

S10~S60‧‧‧Steps

FIG. 1 is a schematic flow chart of a detecting method according to an embodiment of the invention.

2A and 2B are schematic diagrams of a detection system in accordance with an embodiment of the present invention.

FIG. 3A is a schematic diagram of the first image of step S20 shown in FIG. 1.

FIG. 3B is a schematic diagram of the second image of step S40 shown in FIG. 1.

FIG. 3C is a schematic diagram of the conversion of the comparison data of step S40 shown in FIG. 1 into a corresponding image.

FIG. 3D is a schematic diagram of step S60 shown in FIG. 1.

4 is a schematic diagram of a detection system in accordance with another embodiment of the present invention.

Figure 5 is another embodiment of the positioning member shown in Figure 2A.

6 is a cross-sectional view of a detection system in accordance with yet another embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a detection method and a detection system according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings, wherein the same elements will be described with the same reference numerals.

1 is a schematic flow chart of a detecting method according to an embodiment of the present invention. FIG. 2A and FIG. 2B are schematic diagrams of a detecting system according to an embodiment of the present invention. The components of the system and their operation further explain the details of the various steps of the test method. The detecting method of the embodiment is for detecting a difference between a first workpiece P1 and a second workpiece P2. Specifically, the first workpiece P1 of the embodiment may be a workpiece before the mold clamping, and the second workpiece P2 is A workpiece that has been modified for design changes. Of course, the detection method of the present invention can also be applied to other occasions where the other two workpieces need to be compared, and is not limited to the workpiece comparison before and after the mold modification.

Referring to FIG. 1 , the detecting method of the embodiment includes the following steps: placing a first workpiece at a preset position of a detecting platform (step S10); and capturing a first workpiece at a preset angle. An image, and obtaining a first pixel data of the first image (step S20); placing a second workpiece at a preset position of the detection platform (step S30); and capturing the second workpiece at the preset angle a second image, and obtaining a second pixel data of the second image (step S40); and calculating a difference between each pixel of the first pixel data and the second pixel data, and obtaining a comparison data (step S50) ).

As shown in FIG. 2A and FIG. 2B , the detection system S of the embodiment includes a detection platform 1 , a positioning component 2 , at least one image capturing device 3 , and a processing module 4 . In step S10, the first workpiece P1 is placed at a preset position of the detection platform 1. In detail, the preset position is a position at which the workpiece (including the first workpiece P1 and the second workpiece P2) is placed, and the first workpiece P1 and the second workpiece P2 can be disposed at the same position, and then the positioning is performed. The piece 2 fixes the first workpiece P1 and the second workpiece P2. The positioning member 2 of the embodiment is a plurality of sets of clamping members which are disposed on the detecting platform 1 and can define a preset position for the first workpiece P1 to be placed. When the first workpiece P1 is placed at the preset position of the detecting platform 1, the positioning member 2 is located at the periphery of the first workpiece P1, and the first workpiece P1 can be clamped to fix the first workpiece P1 at the preset position. The positioning member 2 of the embodiment further has a structure of a slide rail, which can be adjusted according to the shape and size of the workpiece (including the first workpiece P1 and the second workpiece P2) to define a preset position. The flow steps of the detecting method of the present embodiment will be described in detail below, and other embodiments of the positioning member 2 will be described in detail later.

FIG. 3A is a schematic diagram of the first image of step S20 shown in FIG. 1, please also be combined with FIG. 3A. Next, in step S20, capturing a predetermined angle in a first one of the workpieces P1 of the first image I _1, and acquires the first image I ₁ of the first pixel data. Specifically, as shown in FIG. 2A, the image capturing device 3 of the present embodiment is provided corresponding to the detection platform 1, that is, the image capturing device 3 can capture the image of the object presented by the detection platform 1. The detection system S of the embodiment further has a shelf 5, the detection platform 1 is disposed on one of the shelves 5, and the image capturing devices 3 are disposed on another layer parallel to the detection platform 1, where the detection platform and the detection platform A parallel plane is referred to as a first plane A1. The image capturing device 3 of the present embodiment is disposed on the first plane A1 above the detecting platform 1 to capture the first workpiece P1 at a predetermined angle. Like I ₁ (Figure 3A). It should be noted that, in FIG. 2A, multiple image capturing devices 3 are taken as an example, and multiple image capturing devices 3 can obtain multiple first images I ₁ of different preset angles. The first image I ₁ (see FIG. 3A ) captured by one of the image capturing devices 3 (ie, the image capturing device 3 disposed in the middle) is taken as an example. Of course, the present invention is not limited to the number of image capturing devices 3.

The image capturing device 3 of the embodiment may be a general digital camera and fixedly disposed on the shelf 5, so the image capturing device 3 also corresponds to the detecting platform 1 at a fixed angle, and the pre-preparation of the embodiment The image capturing device 3 captures the first image I _{1 of the} first workpiece P1 at a fixed angle, and obtains the first pixel data of the first image I ₁ , and the processing module 4 and the image The capturing device 3 is coupled to receive the first pixel data from the image capturing device 3.

Next, the first workpiece P1 is taken out, and in step S30, the second workpiece P2 is placed at a preset position of the detection platform 1. It should be noted that when the first workpiece P1 is taken out, the position of the positioning member 2 is not changed, so the preset position defined by the positioning member 2 does not change. In the embodiment, the second workpiece P2 is placed at a preset position defined by the positioning member 2. In step S40, the image capturing device 3 also captures the second image I _{2 of the} second workpiece P2 at the same preset angle as when the first image I ₁ is captured, as shown in FIG. 3B, FIG. 3B. The second image data of the second image I ₂ is obtained from the image capturing device 3 , and the second pixel data is received from the image capturing device 3 . The image capturing device 3 is fixedly disposed on the shelf 5 because the preset position is not changed. Therefore, the angles of the first workpiece P1 and the second workpiece P2 in the first image I ₁ and the second image I ₂ are And the location is essentially the same.

In step S50, the processing module 4 can compare the received first pixel data and the second pixel data. In this embodiment, the processing module 4 has a processing unit 41 for processing The unit 41 can calculate the difference between each pixel of the first pixel data and the second pixel data, and obtain a comparison data. Specifically, the first pixel data and the second pixel data represent the values of the pixels corresponding to the respective coordinate positions in a matrix sequence, that is, the RGB values (R value, G value, and B value) of each pixel, and the processing unit 41 separately Calculating the difference between the pixels of the same coordinate position in the first pixel data and the second pixel data. Therefore, the comparison data may also be represented by a matrix sequence, and the value of each pixel may be the difference between each pixel of the first pixel data and the second pixel data, or other operations may be further performed, as shown in FIG. 1 . The detecting method may further comprise a step S52 of binarizing the data, in other words, binarizing the data by the processing unit 41 of the processing module 4.

For example, after the difference (alignment data) of each pixel of the first pixel data and the second pixel data is grayed out and taken as an absolute value, in the embodiment, the formula sqrt (ΔR ² + is used. ΔG ² + ΔB ² ). Then, the pixel whose absolute value is greater than or equal to the threshold value is defined as a first value, such as a grayscale value of 000, and the pixel whose absolute value of the difference is less than the threshold value is defined as a second value, such as a grayscale value of 255. In order to achieve the effect of rendering the image of binarization. Among them, the threshold value can be set by the user, and the degree of difference to be filtered can be set first. For example, by filtering (or ignoring) the difference of 20% or less as an example, the threshold value of the embodiment may be defined as 88 (the gray scale value is 88), which is due to the R value and the G value of each pixel. The maximum difference of B values is 255. Therefore, by substituting into the formula sqrt(255 ² +255 ² +255 ² ), 441 can be obtained as the maximum value after the data is grayed out and the absolute value is taken, and the threshold value is 441x20% of the obtained 88. Here, the threshold value is defined as 88, and if the absolute value of the difference value is less than or equal to 88, the pixel is defined as a grayscale value of 255 (the second value) is white, that is, the absolute value of the filter difference is less than or equal to 88 to avoid the system. Too sensitive and affected by a little bit of light. On the other hand, if the absolute value of the difference is greater than 88, the processing unit 41 can define it as a grayscale value of 000 (the first value), that is, automatically mark the position of the pixel and perform coloring. In other words, the grayscale value of the pixel with the difference between the first pixel data and the second pixel data is defined as 000, which can be black, and the grayscale value of the pixel with small difference is defined as 255, which can be white. The processing module 4 of the embodiment further includes a signal conversion unit 42 and a display unit 43. The signal conversion unit 42 can convert the comparison data into a corresponding image. This embodiment refers to the comparison image I _c . And displayed on the display unit 43, as shown in FIG. 3C, FIG. 3C is a schematic diagram of the comparison of the data of step S40 shown in FIG. 1 into a corresponding image. Wherein, the white color of the comparison image is the same position of the first workpiece P1 and the second workpiece P2, and the position where the first workpiece P1 and the second workpiece P2 are different is black. Of course, the first value and the second value may also be defined as other values, such that black is present in the difference, and no difference is present in white, or other colors, and the invention is not limited thereto.

In other words, since the definition of the threshold value can filter out pixels having only slight differences, the slight difference may be noise that is difficult to avoid for the digital image, or when the first workpiece P1 and the second workpiece P2 are placed at the preset position. Subtle differences, even due to light, cause subtle differences in background values. Therefore, the definition of the threshold value can filter out the aforementioned slight difference, thereby more accurately displaying the difference between the first workpiece P1 and the second workpiece P2. In addition, in other embodiments, the surface of the detecting platform 1 for placing the workpieces (the first workpiece P1 and the second workpiece P2) may be a rough or matte surface, which may spray the surface of the detecting platform 1 The detection platform 1 having a rough or matte surface can avoid the generation of shadows, thereby reducing the interference of background values.

In addition, in order to make the user more clearly determine the difference between the first workpiece P1 and the second workpiece P2, the detecting method of the embodiment may further include step S60, and the processing module 4 may jointly output the comparison data and the first pixel data. Or second pixel data. In detail, the processing unit 41 can output the comparison data and the first pixel data to the display unit 43 together, so that the display unit 43 can simultaneously display the comparison image I _c and the first image I ₁ , as shown in FIG. 3D . FIG. 3D is a schematic diagram of step S60 shown in FIG. 1. In other words, the first image I ₁ is used as a reference, and the comparison image I _{c is} colored on the first image I ₁ . In order to prevent the comparison image from covering the first image I ₁ , the opaque parameter value (α value) of the comparison data may be reduced. For example, the opaque parameter value (α value) of the comparison data may be set to 0.5, thereby in addition to the external display unit 43 presenting a first image I ₁ by reference for the user, by addition, and thus can clearly see the image than I _c translucent cover (coloring) of the first image I ₁ have a difference of At the office. In addition, for some smaller and less directly observable areas, a soft magnifying glass function is provided, so that the user can see the finer and larger pixels to clearly distinguish the difference, and the implementation method is It is familiar to those of ordinary skill in the art to which the present invention pertains, and is not described herein. Of course, the second image I ₂ can be used as a reference. In step S60, the comparison data and the second pixel data are jointly output. For other operation contents, reference may be made to the foregoing, and no further details are provided herein.

In other embodiments, after the setting manner or angle of the first workpiece P1 is changed, the steps S10 to S40 are repeated to obtain the plurality of first images I ₁ of the first workpiece P1 at different positions or angles and corresponding ones. A plurality of second images I _{2 of the} second workpiece P2. It should be noted that the plurality of first images I ₁ and the plurality of second images I ₂ should have different angles or set positions, respectively, and the drawings are directly referred to FIG. 3A and FIG. 3B, in the following embodiments. It is not represented by other drawings. For example, if the difference between the first workpiece P1 and the second workpiece P2 on the right side is to be observed, the first workpiece P1 can be erected and fixed by the positioning member 2 and a predetermined position is defined (step S10). The first image I ₁ of the first workpiece P1 of the setting mode (angle) is obtained again (step S20). Next, the second workpiece P2 is placed at the predetermined position in the same manner (step S30), and the second image I _{2 of} the second workpiece P2 is also acquired (step S40). Therefore, the preset angle of the embodiment may include a plurality of preset angles, and since the image capturing device 3 is fixed, the plurality of preset angles represent the first image I of the first workpiece P1 of different positions or angles. ₁ and a second image I ₂ of the second workpiece P2 corresponding to the position or angle. In step S50, the first pixel data and the second pixel data obtained are obtained at the same set position or angle for the same preset angle, that is, the workpiece (the first workpiece P1 and the second workpiece P2).

In addition, in other embodiments, the image capturing device 3 can have a plurality of different orientations at the same time. As shown in FIG. 4, FIG. 4 is a schematic diagram of a detection system according to another embodiment of the present invention. In this embodiment, the image capturing device 3 of a plurality of different orientations may be disposed to obtain a plurality of first images I ₁ and a plurality of second images I _{2 of} a plurality of preset angles. Specifically, the detection system S of the embodiment is different from the first plane A1 parallel to the detection platform 1, that is, the first workpiece P1 (FIG. 4 is illustrated by taking the first workpiece P1 as an example, and of course, can be replaced with the second workpiece. The image capturing device 3a is disposed above the P2), and the image capturing device 3b is disposed on the second plane A2 perpendicular to the detecting platform 1, that is, the side corresponding to the first workpiece P1, and the embodiment is an image. The capturing device 3a and the four image capturing devices 3b are exemplified, and in order to simplify the drawing, the image capturing device 3b on one side (front side) is omitted. Wherein each image capturing means 3a, 3b can capture one of the preset angle of the first image I _1, and therefore, in step S20 or step S40 may be sequentially or simultaneously triggered plurality of image capturing means 3a, 3b, to obtain a plurality of first images I ₁ second image I _{2 of} a plurality of preset angles. Similarly, in step S50, the first pixel data and the second pixel data obtained from the same image capturing device 3a or 3b are compared to the same preset angle. Since the detecting system S of the embodiment has the image capturing device 3b disposed on the side of the detecting platform 1 and the workpieces (the first workpiece P1 and the second workpiece P2), the blind hole of the workpiece can be further Check the depth difference of the blind holes before and after the mold repair. In other words, the image capturing device 3a disposed on the first plane A1 can be obtained from the first image I ₁ or the second image I _{2 of the} XY axis (as shown in FIGS. 3A and 3B ) and disposed on the second plane. The image capturing device 3b of A2 can obtain the first image or the second image of the Z axis (not shown), thereby providing a difference between the two images on the XY axis and the Z axis, and the Z axis. The difference can be applied to detect the difference in depth.

The image capturing device 3 of the embodiment is disposed at a fixed position, and respectively captures images of the workpiece (the first workpiece P1 and the second workpiece P2) at various planes or angles at a fixed angle. . Therefore, it is possible to replace the workpiece that is mounted on the dynamic moving slide by the image capturing device and photographed at a plurality of different positions to achieve the purpose and effect of comparing the differences of the different workpieces. Furthermore, in this embodiment, the image is captured in a static manner, which can solve the problem that the image is captured in a dynamic manner, and the vibration generated when moving will cause an error in the image. In addition, it is necessary to use an expensive industrial camera in order to avoid the error caused by the vibration. This embodiment can be a plurality of image capturing devices 3 of a general camera, and the cost can be effectively reduced.

FIG. 5 is another embodiment of the positioning member shown in FIG. 2A. Please refer to FIG. 5 . The detecting system S of the embodiment has at least one positioning member 2a, and the positioning member 2a is of a block or block type design, and can be disposed on the first workpiece P1 and the second workpiece P2 by the positioning member 2a. The notch can also be disposed on the periphery of the first workpiece P1 and the second workpiece P2. This embodiment is described by taking the two positioning members 2a in the notches of the first workpiece P1 and the second workpiece P2. It should be noted that FIG. 5 only illustrates the first workpiece P1 as an example, and may of course be replaced with the second workpiece P2.

Specifically, the detecting platform 1a and the positioning member 2a of the embodiment may include a metal material or a magnetic material, that is, the detecting platform 1a and the positioning member 2a of the embodiment may be mutually attracted by magnetic force or other non-contact force. The positioning member 2a can have different configurations according to different workpieces (the first workpiece P1), or the plurality of positioning members 2a can be combined to form different configurations, that is, like the way of building blocks, and thus the positioning can be easily adjusted. The setting position of the piece 2a. The detecting platform 1a of the embodiment is an iron plate, and the positioning member 2a is a magnetic material, and the magnetic force is preferably about 4000 Gauss or more than 4000 Gauss. In the application, the first workpiece P1 can be placed on the detecting platform 1a, and then the positioning member 2a can be placed on the gap of the first workpiece P1. If there is no gap, the second workpiece P1 can also be disposed opposite to the first workpiece P1. Side to fix the first workpiece P1. The position where the first workpiece P1 is fixed is the preset position, and after the image capturing device 3 obtains the first image I ₁ (step S20, refer to FIG. 3A ), when the first workpiece P1 is removed, the positioning is performed. The piece 2a is still maintained in the home position, and to step S30, the second workpiece P2 is set to the preset position. In detail, since the first workpiece P1 of the embodiment is the workpiece before the mold modification, and the second workpiece P2 is the workpiece after the design modification, the first workpiece P1 and the second workpiece P2 should have With the same notch, the second workpiece P2 can be placed in the same manner, that is, the notch corresponding to the positioning member 2a.

In addition, the detection platform 1a and the positioning member 2a of the present embodiment are designed to directly replace the color system of the detection platform 1a by using a material that attracts each other by magnetic force or other non-contact force. For example, the detecting platform 1a can lay a color paper. If the workpiece (the first workpiece P1 and the second workpiece P2) is black, a bright color paper such as white or yellow can be used. Otherwise, if the workpiece is white, the workpiece can be white. The use of black colored paper to increase contrast without being disturbed by the background makes it easier to judge the difference between the first workpiece P1 and the second workpiece P2. Therefore, the positioning member 2a of the present embodiment can simultaneously have the convenience of replacing the color system of the detecting platform 1a and fixing the workpiece. In addition, it can also be used as a tool for pressing the color paper of the detecting platform 1a without causing the paper to be easily warped. In other embodiments, the detecting platform 1 can be a pull-type detecting platform 1 so that the user can easily replace the workpiece, and the color paper of the detecting platform 1 can be replaced conveniently.

FIG. 6 is a cross-sectional view of a detection system according to another embodiment of the present invention. Referring to FIG. 6, the detection system S of the present embodiment further includes a light shielding member 6 and a light source 7, wherein the light shielding member 6 is disposed on The periphery of the shelf 5 allows the detection platform 1 to be placed in the darkroom. It should be noted that since the drawing is difficult to indicate the state of the dark room, the light shielding member 6 is disposed on the periphery of the shelf 5, and the drawing surface is simple. The positioning member 2 is not shown in FIG. In addition, the light source 7 is disposed in the dark room formed by the shelf 5 and the light shielding member 6. The light source 7 is disposed corresponding to the detecting platform 1. Preferably, the light source 7 is disposed on the first plane A1 of the shelf 5 parallel to the detecting platform 1. To provide a relatively uniform light source for the image capturing device 3. Further preferably, the light source 7 is provided by a white light source.

In summary, the detection method and the detection system of the present case, through the simple detection platform and the setting of the fixing member, respectively, the two workpieces (the first workpiece and the second workpiece) are set at the same preset position, and fixed by The image capturing device respectively obtains a first image corresponding to the first workpiece and a second image corresponding to the second workpiece, and the angles and positions of the first image and the second image are substantially the same. Then, the first pixel data of the first image is directly calculated by the processing module After the difference between each pixel of the second pixel data of the second image is obtained, and the comparison data is obtained, the difference between the first workpiece and the second workpiece can be viewed by the image displayed by the comparison data. Therefore, the present invention can achieve the effect of comparing the differences between different workpieces by simple calculation platform, positioning member and image capturing device, and processing module for simple calculation.

In addition, the comparison data may be output together with the first pixel data or the second pixel data, and the first image or the second image is used as a reference, and the compared image is overlaid on the first image. Or the second image, so that the user can more clearly see the difference between the first workpiece and the second workpiece.

In addition, the definition of the threshold value can filter out the noise that is difficult to avoid in the digital image, or the slight difference between the first workpiece and the second workpiece placed in the preset position, even the background value due to the light. Different minor differences can be used to more accurately display the difference between the first workpiece and the second workpiece.

In addition, the image capturing device can be disposed on the side of the detecting platform to take the first image or the second image acquired on the Z axis, and further, the blind hole before and after the mold clamping can be further checked for the blind hole of the workpiece. The difference in depth.

The above is intended to be illustrative only and not limiting. Any equivalent modifications or alterations to the spirit and scope of the invention are intended to be included in the scope of the appended claims.

S10~S60‧‧‧Steps

Claims (15)

A detecting method for detecting a difference between a first workpiece and a second workpiece, the detecting method comprising the steps of: placing the first workpiece at a preset position of a detecting platform; and capturing the predetermined angle a first image of the first workpiece, and obtaining a first pixel data of the first image; placing the second workpiece at the preset position of the detection platform; and capturing the second at the preset angle a second image of the workpiece, and obtaining a second pixel data of the second image; calculating a difference between each pixel of the first pixel data and the second pixel data, and obtaining a comparison data; and reducing And comparing the opaque parameter values of the data, and jointly outputting the comparison data and the first pixel data or the second pixel data after reducing the opacity parameter value. The detecting method of claim 1, further comprising: jointly outputting the comparison data and the first pixel data or the second pixel data. The detection method of claim 2, further comprising: displaying the comparison data together with the first pixel data or the second pixel data in a display unit. The detection method described in claim 1 of the patent application further includes: binarizing the comparison data. The detection method of claim 1, wherein the preset angle includes a plurality of the preset angles, and the processing module obtains the first pixel data and the second ratio obtained for the same preset angle. Pixel data. a detecting system for detecting a difference between a first workpiece and a second workpiece, the detecting system comprising: a detecting platform for placing the first workpiece or the second workpiece; a positioning member disposed on the detecting platform The positioning member fixes the first workpiece or the second workpiece at a predetermined position; at least one image capturing device corresponding to the detection platform is configured to capture the first workpiece in a predetermined And setting a first image of the first image and the second image of the second workpiece, and acquiring a first pixel data corresponding to the first image, and obtaining a second pixel corresponding to the second image And a processing module coupled to the image capturing device, the processing module calculates a difference between each pixel of the first pixel data and the second pixel data, and obtains a comparison data, the processing mode The group reduces the opacity parameter value of the comparison data, and the processing module outputs the comparison data and the first pixel data or the second pixel data after reducing the opacity parameter value. The detection system of claim 6, wherein the processing module outputs the comparison data and the first pixel data or the second pixel data together. The detection system of claim 7, wherein the processing module comprises a display unit for jointly displaying the comparison data and the first pixel data or the second pixel data. The detection system of claim 6, wherein the detection platform comprises a metal material or a magnetic material, and the positioning member comprises a metal material or a magnetic material. The detection system of claim 6, wherein the processing module binarizes the comparison data. The detecting system of claim 6, comprising a plurality of the image capturing devices respectively disposed on a first plane parallel to the detecting platform and at least one second plane perpendicular to the detecting platform To obtain a plurality of the first pixel data and a plurality of the second pixel data of a plurality of preset angles. The detection system of claim 11, wherein the processing module compares the first pixel data and the second pixel data obtained for the same predetermined angle. The detection system of claim 6, further comprising: a light source corresponding to the detection platform setting. The detection system of claim 6, wherein the detection platform is disposed in a dark room. The detection system of claim 6, wherein the detection platform comprises a rough or matte surface.