Visual inspection system in varicosity sock production process

Abstract

The invention relates to the technical field of visual inspection of product quality, in particular to a visual inspection system in a varicosity sock production process. The system is based on the special structure and function of the varicosity sock, and analysis is carried out mainly from the three aspects of contour integrity, stress balance and structural integrity. First, contour integrity is determined based on information of a spinning gap region and a spinning region. Considering that the comfort of the varicosity sock needs to be guaranteed, the yarn gaps are distributed uniformly, and the stress balance is further obtained. The structural integrity is determined according to the dimension decreasing characteristic of the gap area between adjacent heights, and then whether the sample is a qualified product is determined. Based on the three characteristics of the varicosity socks, the varicosity socks are detected from the three dimensions of the contour surface, the stress performance and the structural characteristics, and accurate and effective quality detection can be achieved in the production process of the varicosity socks on the basis of the visual detection principle in combination with the characteristics of the varicosity socks.

Description

Technical Field

[0001] The invention relates to the technical field of product quality visual inspection, and in particular to a visual inspection system in the production process of varicose vein socks. Background Art

[0002] Varicose vein socks are a medical treatment device that has the function of promoting venous blood return to the heart. During the production process of varicose vein socks, samples need to be randomly inspected to evaluate the quality of the production batch. For textile products such as varicose vein socks, in order to avoid the subjective influence of human quality inspection, computer vision technology is used to extract the surface image of the sample and identify the distribution state of the yarn to determine the quality of the textile. However, varicose vein socks have special functions and structures compared to ordinary textiles. The existing technology evaluates the product by determining the distribution of yarns based on the trend of texture changes. It does not take into account the special structure of varicose vein socks and can only obtain surface quality information, resulting in the inability to accurately and effectively test the product performance of varicose vein socks during the detection process. Summary of the invention

[0003] In order to solve the technical problem that the prior art does not take into account the special structure of varicose vein socks, resulting in the inability to accurately detect the performance of samples during the detection process, the purpose of the present invention is to provide a visual inspection system in the production process of varicose vein socks. The technical solution adopted is as follows: The present invention proposes a visual inspection system in the production process of varicose vein socks, the system comprising: The varicose vein socks image acquisition module is used to obtain the surface image of the varicose vein socks sample on the production line; and obtain the spinning area and the spinning gap area according to the edge information in the surface image; A profile integrity analysis module; used to obtain gap uniformity parameters according to the size difference between the yarn gap areas, and to obtain profile integrity in combination with the brightness uniformity of the yarn areas; if the profile integrity meets the production requirements, the force balance analysis module is entered for analysis, otherwise it is marked as a substandard product; The force balance analysis module is used to obtain the shape change trend between adjacent yarn gap areas at the same yarn height along the direction from the bottom of the varicose vein socks to the sock opening, and obtain the force balance according to the shape change trend at all heights and the contour integrity; if the force balance meets the production requirements, enter the structural integrity analysis module for analysis, otherwise it is marked as a substandard product; The structural integrity analysis module is used to obtain the structural integrity according to the decreasing trend of the size of the yarn gap area between adjacent heights; if the structural integrity meets the production requirements, it is judged as a qualified product, otherwise it is an unqualified product.

[0004] Furthermore, the method for obtaining the spinning area and the spinning gap area includes: Obtain edge pixel points of the surface image, take adjacent edge pixel points whose pixel value difference is less than or equal to a preset pixel value threshold as edge pixel points of the same edge line, obtain all edge lines in the surface image, the edge lines are the spinning areas, and the non-edge pixel points between the spinning areas constitute the spinning gap areas.

[0005] Furthermore, the method for obtaining the gap uniformity parameter includes: The variance of the yarn gap area is negatively correlated to obtain the gap uniformity parameter.

[0006] Furthermore, the method for obtaining brightness uniformity includes: The standard deviation of the pixel values ​​of the edge pixels is negatively correlated to obtain the brightness uniformity.

[0007] Furthermore, the method for obtaining the contour integrity includes: The gap uniformity parameter and the brightness uniformity are multiplied and then normalized to obtain the profile integrity.

[0008] Furthermore, the method for obtaining the shape change trend includes: For two adjacent spinning gap areas at the same spinning height, a shape matching algorithm is used to obtain shape difference values ​​of the two adjacent spinning gap areas, and the center of mass distance of the two adjacent spinning gap areas is obtained, and the product of the center of mass distance and the shape difference value is used as the shape change trend.

[0009] Furthermore, the method for obtaining the force balance includes: At the same spinning height, the shape change trends are sorted according to the positions of the corresponding spinning gap areas to obtain a shape change trend sequence. In the shape change trend sequence, the differences between adjacent elements are obtained, and the accumulated values ​​of the differences between adjacent elements are negatively correlated and normalized to obtain shape change uniformity. The shape change uniformity is multiplied by the contour integrity and then normalized to obtain the force balance.

[0010] Furthermore, the method for obtaining the structural integrity includes: At each spinning line height, the average center of mass distance between all adjacent spinning line gap areas is counted; the difference in the average center of mass distance between adjacent spinning line heights is obtained, and if the difference in the average center of mass distance is a negative number, the mark value between the adjacent spinning line heights is set to 0, otherwise it is set to 1; the mark values ​​between all adjacent spinning line heights are accumulated to obtain the structural integrity.

[0011] Furthermore, the production requirements are: the contour integrity is greater than a preset first threshold, the force balance is greater than a preset second threshold, and the structural integrity is equal to 0.

[0012] Furthermore, the method for acquiring edge pixel points includes: after preprocessing the surface image, performing edge detection using a Canny operator to obtain the edge pixel points.

[0013] The present invention has the following beneficial effects: The present invention is based on the special structure and function of varicose vein socks, and is mainly analyzed from three aspects: contour integrity, force balance, and structural integrity. Considering that varicose vein socks are textiles, the surface yarn integrity is an important quality evaluation criterion for textiles. Therefore, the present invention first determines the contour integrity based on the yarn gap area and the information of the yarn area. Further considering that varicose vein socks also need to ensure comfort, the arrangement of the yarn gap should be uniform, so that force balance can be further obtained. Considering that varicose vein socks tighten and squeeze the veins through the structural characteristics of upper delivery and lower tightening, so as to achieve the function of promoting the return of veins to the heart, the structural integrity is further determined according to the decreasing size characteristics of the gap area in the direction between adjacent heights, and then it is determined whether the sample is a qualified product. Based on the three characteristics of varicose vein socks, the present invention detects varicose vein socks from three dimensions: contour surface, force performance, and structural characteristics. It can realize accurate and effective quality inspection in the production process of varicose vein socks based on the principle of visual inspection and the characteristics of varicose vein socks. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions and advantages in the embodiments of the present invention or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 A structural block diagram of a visual inspection system in the production process of varicose vein socks provided by an embodiment of the present invention; Figure 2 A sample diagram of a varicose vein sock provided by an embodiment of the present invention; Figure 3 A yarn distribution diagram of a varicose vein sock provided by one embodiment of the present invention; Figure 4 An edge image of a varicose vein sock provided by an embodiment of the present invention; Figure 5A schematic diagram of the elastic structure of varicose vein socks provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0016] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following is a detailed description of the specific implementation, structure, features and effects of a visual inspection system for varicose vein socks production process proposed by the present invention in combination with the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "another embodiment" does not necessarily refer to the same embodiment. In addition, specific features, structures or characteristics in one or more embodiments may be combined in any suitable form.

[0017] Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

[0018] The embodiment of the present invention is aimed at quality inspection during the production process of varicose vein socks. During the production process, a production batch of varicose vein socks can be randomly sampled, and the sampled samples can be quality inspected using the visual inspection system in the production process of varicose vein socks provided by the embodiment of the present invention to determine the product qualification rate.

[0019] The specific scheme of the visual inspection system for varicose vein socks production provided by the present invention is described in detail below in conjunction with the accompanying drawings.

[0020] See also Figure 1 , which shows a structural block diagram of a visual inspection system in a varicose vein socks production process provided by an embodiment of the present invention, the system includes a varicose vein socks image acquisition module 101, a contour integrity analysis module 102, a force balance analysis module 103 and a structural integrity analysis module 104.

[0021] The varicose vein socks image acquisition module 101 is used to obtain the surface image of the varicose vein socks samples on the production line; and obtain the spinning area and the spinning gap area according to the edge information in the surface image.

[0022] In the embodiment of the present invention, considering that image quality has a great influence on visual detection effect, in order to avoid the influence of light on image quality, the varicose vein socks image acquisition module 101 of the embodiment of the present invention specifically includes a light-shielding dark box, a circular light source is placed in the light-shielding dark box, and cameras are installed on both sides of the light-shielding dark box, and surface images of both sides of varicose veins are obtained by cameras on both sides. It should be noted that the processing method of the surface images on both sides in the system provided by the embodiment of the present invention is the same. In order to facilitate the subsequent data processing, the two images can be spliced ​​and merged into one surface image to continue the analysis of the subsequent modules.

[0023] See also Figure 2 , which shows a sample diagram of a varicose vein sock provided by an embodiment of the present invention, Figure 2 The enlarged area in the figure shows that varicose vein socks are mainly made of uniformly spun yarn and are a textile product. Figure 3 , which shows a yarn distribution diagram of a varicose vein sock provided by an embodiment of the present invention. For textiles, the main reference information of their quality is the yarn distribution information. Therefore, the varicose vein sock image acquisition module 101 needs to further process the surface image, extract the yarn area and yarn gap area in the image, and use them for the analysis of subsequent modules.

[0024] Preferably, in one embodiment of the present invention, the method for obtaining the spinning area and the spinning gap area includes: The edge pixel points of the surface image are obtained, and the edge pixel points that are adjacent and whose pixel value difference is less than or equal to a preset pixel value threshold are taken as the edge pixel points of the same edge line, and all edge lines in the surface image are obtained, where the edge line is the spinning area, and the non-edge pixel points between the spinning areas constitute the spinning gap area. In the embodiment of the present invention, the pixel value threshold is set to 0, that is, adjacent and continuous edge pixel points with the same pixel value constitute an edge line.

[0025] In an embodiment of the present invention, after the surface image is preprocessed, the canny operator is used to perform edge detection to obtain the edge pixel points. It should be noted that the image preprocessing method is a technical means well known to those skilled in the art, which can improve the quality of the image through the preprocessing method, thereby improving the accuracy of edge detection. The specific preprocessing method in the embodiment of the present invention includes: extracting the varicose vein socks area in the surface image through semantic segmentation technology to prevent interference from background information; further performing Gaussian sharpening processing on the varicose vein socks area to enhance the image edge details, compensate for the clarity of the image contour, and improve the overall image resolution. Please refer to Figure 4 , which shows an edge image of a varicose vein sock provided by an embodiment of the present invention, and Figure 2 Correspondingly, Figure 4 It also includes a local enlarged image of the edge image of the varicose vein socks. It should be noted that after the edge image is obtained using the edge detection algorithm, the edge pixels in the edge image correspond to the pixels in the surface image, that is, the edge pixels in the surface image.

[0026] Varicose vein socks are textiles made of criss-crossed lines of Lycra, nylon, etc. The socks run through from top to bottom, with the longitudinal direction as the main direction and the transverse direction as the auxiliary direction, and the adjacent lines are closely connected; at the same time, the same varicose vein socks are generally woven with lines of the same material and color, so that the surface brightness of the varicose vein socks under uniform light is small or no difference. Therefore, for the surface information of varicose vein socks, the surface brightness information and the distribution density between the yarn gap areas are important reference information for surface quality evaluation. The contour integrity analysis module 102 is used to obtain the gap uniformity parameter according to the size difference between the yarn gap areas, and obtain the contour integrity in combination with the brightness uniformity of the yarn area. The greater the size difference between the yarn gap areas, the more chaotic the yarn distribution is, and there is a textile defect somewhere, which causes the gap to be significantly different from other gaps. The smaller the gap uniformity parameter is, the smaller the contour integrity is. Under uniform light, the greater the brightness uniformity of the yarn area, the more uniform the yarn distribution of the varicose vein socks is, and there is no brightness fluctuation caused by the interlacing of yarns distributed in the same direction, and the stronger the contour integrity is.

[0027] The stronger the contour integrity, the more the sample meets the standards in the surface quality inspection link. Therefore, the contour integrity analysis module 102 further determines whether the contour integrity meets the production requirements. If so, it enters the force balance analysis module 103 for further varicose vein socks performance analysis. Otherwise, it means that the sample does not meet the basic surface quality requirements and is marked as an unqualified product.

[0028] Preferably, in an embodiment of the present invention, the variance of the area of ​​the spinning gap region is negatively correlated to obtain the gap uniformity parameter. That is, the smaller the variance, the more uniform the area of ​​the spinning gap region is, and there are no obvious local defects. It should be noted that the negative correlation mapping can be implemented using a variety of basic mathematical algorithms such as reciprocals, opposite numbers, etc., which are technical means well known to those skilled in the art. In an embodiment of the present invention, the reciprocal method is used for negative correlation mapping. At the same time, in order to avoid the denominator being 0, the reciprocal after adding the positive integer 1 to the data is used as the final negative correlation mapping result.

[0029] Preferably, based on the edge pixel points in the surface image obtained in the embodiment of the present invention, the method for obtaining brightness uniformity includes: performing negative correlation mapping on the standard deviation of the pixel values ​​of the edge pixel points to obtain the brightness uniformity. The edge pixel points can be regarded as spinning pixel points, so the larger the standard deviation of the pixel values ​​of the spinning pixel points, the more uneven the brightness of the spinning pixel points, the more likely surface defects will occur, and the smaller the brightness uniformity. It should be noted that the specific implementation process of the negative correlation mapping method has been given in the above embodiment, which will not be repeated here.

[0030] Preferably, in one embodiment of the present invention, because both the gap uniformity parameter and the brightness uniformity parameter are positively correlated with the profile integrity, the gap uniformity parameter and the brightness uniformity are multiplied and normalized to obtain the profile integrity. It should be noted that in the embodiment of the present invention, the hyperbolic tangent function mapping method is selected to achieve normalization. Those skilled in the art may also use basic mathematical methods such as sigmoid function mapping and range normalization, which will not be elaborated here.

[0031] Varicose vein socks are different from traditional ordinary socks. They have the function of preventing or improving varicose veins. Therefore, in order to ensure the functionality and reliability of varicose vein socks, the system of the embodiment of the present invention needs to further analyze the performance of the sample. Because the principle of varicose vein socks is to promote blood circulation by close contact with the patient's body through a special structure, the close contact of varicose vein socks to the skin is one of the important quality evaluation criteria. For textiles, the more balanced the force, the stronger the elasticity of the product, and it can be applied to different users, so that the user can fit the user's skin after wearing it. In order to ensure the elasticity of varicose vein socks, the arrangement of the yarns should be close and the intervals should be similar, so that the user can provide uniform contraction force after wearing it. Therefore, the force balance analysis module 103 analyzes along the direction from the bottom of the varicose vein socks to the sock opening, divides the varicose vein socks area into different heights, performs the same analysis for each height, and obtains the shape change trend between the adjacent yarn gap areas at the same yarn height. The more stable the shape change trend, the more normal the interval distribution at the current height, and the better the force balance of the varicose vein socks. Then, the force balance is obtained according to the shape change trend and contour integrity at all heights. Similar to the assessment of contour integrity, if the force balance meets the production requirements, the structural integrity analysis module 104 is entered for analysis, otherwise it is marked as a defective product.

[0032] Preferably, in one embodiment of the present invention, the method for acquiring the shape change trend includes: For two adjacent spinning gap areas at the same spinning height, a shape matching algorithm is used to obtain the shape difference values ​​of the two adjacent spinning gap areas, and the distance between the centers of mass of the two adjacent spinning gap areas is obtained, and the product of the center of mass distance and the shape difference value is used as the shape change trend. That is, the larger the shape difference value, the farther the center of mass distance, indicating that the current shape change trend is greater. It should be noted that the shape matching algorithm and the method for obtaining the distance between the centers of mass are technical means well known to those skilled in the art, and will not be repeated here.

[0033] Preferably, in one embodiment of the present invention, considering that for varicose vein socks, the shape change trend between adjacent yarn gap areas at the same height should be small or even zero, if there is a defect somewhere, the shape change trend at that location will be large, and the shape change trend corresponding to other surrounding areas will be significantly different, so the method for obtaining force balance in the embodiment of the present invention includes: At the same spinning height, the shape change trend is sorted according to the position of the corresponding spinning gap area to obtain a shape change trend sequence. In the shape change trend sequence, the difference between adjacent elements is obtained. The difference is the absolute value of the difference between two elements. The larger the difference, the more likely it is that the spinning gap area at that position at that height has an uneven distribution defect, resulting in poor contractility of varicose vein socks. Therefore, the cumulative value of the difference between adjacent elements is negatively correlated and normalized to obtain shape change uniformity. That is, the smaller the cumulative value of the difference, the more uniform the shape of the spinning gap area at that height, and the greater the shape change uniformity. Further combined with contour integrity, the shape change uniformity is multiplied by contour integrity and normalized to obtain force balance.

[0034] It should be noted that the negative correlation mapping, normalization and other mathematical operations in different steps of the embodiment of the present invention all adopt the same method, which will not be described in detail here.

[0035] See also Figure 5 , which shows a schematic diagram of the elastic structure of a varicose vein socks provided by an embodiment of the present invention. Figure 5 It can be seen that varicose vein socks have the characteristics of being loose on the top and tight on the bottom. During use, through the structural characteristics of being loose on the top and tight on the bottom, the blood in the veins below the limbs is squeezed and sent to the blood vessels in the pressure-relaxed area at the upper end of the limbs, thereby promoting the return of the veins to the heart. The direction of the change in tightness is gradually loosening from the bottom to the sock opening, that is, the yarn gap area will become larger and larger in this direction, and the lower the degree of restraint of the user's limbs, the lower the socks are on the upper part. At the same time, due to the human body morphological structure, the part extending from the end of the limbs to the trunk gradually changes from thick to thin. Therefore, the structural integrity analysis module 104 obtains the structural integrity according to the decreasing trend of the size of the yarn gap area between adjacent heights. The yarn gap area between adjacent heights is in an obvious decreasing trend, which means that the structural integrity meets the production requirements. If the structural integrity meets the production requirements, it is determined to be a qualified product, otherwise it is an unqualified product.

[0036] Preferably, in an embodiment of the present invention, the method for obtaining structural integrity includes: At each spinning height, the average centroid distance between all adjacent spinning gap areas is counted; the difference between the average centroid distances between adjacent spinning heights is obtained. If the difference between the average centroid distances is a negative number, the mark value between the adjacent spinning heights is set to 0, otherwise it is set to 1; the mark values ​​between all adjacent spinning heights are accumulated to obtain the structural integrity. That is, the closer the structural integrity is to 0, the more the structural shape of the varicose vein socks meets the product requirements.

[0037] Furthermore, in the embodiment of the present invention, the production requirements are: the contour integrity is greater than a preset first threshold, the force balance is greater than a preset second threshold, and the structural integrity is equal to 0. Because the contour integrity and force balance in some embodiments of the present invention are normalized data, the first threshold is set to 0.8 and the second threshold is set to 0.8 in the embodiment of the present invention.

[0038] In summary, the embodiments of the present invention are based on the special structure and function of varicose vein socks, and are mainly analyzed from three aspects: contour integrity, force balance, and structural integrity. Considering that varicose vein socks are textiles, the surface yarn integrity is an important quality evaluation criterion for textiles. Therefore, the present invention first determines the contour integrity based on the yarn gap area and the information of the yarn area. Further considering that varicose vein socks also need to ensure comfort, the arrangement of the yarn gap should be uniform, so that force balance can be further obtained. Considering that varicose vein socks tighten and squeeze the veins through the structural characteristics of upper delivery and lower tightening, so as to achieve the function of promoting the return of veins to the heart, the structural integrity is further determined according to the decreasing size characteristics of the gap area in the direction between adjacent heights, and then it is determined whether the sample is a qualified product. Based on the three characteristics of varicose vein socks, the present invention detects varicose vein socks from three dimensions: contour surface, force performance, and structural characteristics. It can realize accurate and effective quality inspection in the production process of varicose vein socks based on the principle of visual inspection and the characteristics of varicose vein socks.

[0039] It should be noted that the sequence of the above embodiments of the present invention is only for description and does not represent the advantages and disadvantages of the embodiments. The processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0040] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

Claims

1. A visual inspection system for varicose vein socks during production, characterized in that: The system comprises: The varicose vein socks image acquisition module is used to obtain the surface image of the varicose vein socks sample on the production line; and obtain the spinning area and the spinning gap area according to the edge information in the surface image; A profile integrity analysis module; used to obtain gap uniformity parameters according to the size difference between the yarn gap areas, and to obtain profile integrity in combination with the brightness uniformity of the yarn areas; if the profile integrity meets the production requirements, the force balance analysis module is entered for analysis, otherwise it is marked as a substandard product; The force balance analysis module is used to obtain the shape change trend between adjacent yarn gap areas at the same yarn height along the direction from the bottom of the varicose vein socks to the sock opening, and obtain the force balance according to the shape change trend at all heights and the contour integrity; if the force balance meets the production requirements, enter the structural integrity analysis module for analysis, otherwise it is marked as a substandard product; The structural integrity analysis module is used to obtain the structural integrity according to the decreasing trend of the size of the yarn gap area between adjacent heights; if the structural integrity meets the production requirements, it is judged as a qualified product, otherwise it is an unqualified product.

2. A visual inspection system for varicose vein socks production according to claim 1, characterized in that: The method for obtaining the spinning area and the spinning gap area comprises: Obtain edge pixel points of the surface image, take adjacent edge pixel points whose pixel value difference is less than or equal to a preset pixel value threshold as edge pixel points of the same edge line, obtain all edge lines in the surface image, the edge lines are the spinning areas, and the non-edge pixel points between the spinning areas constitute the spinning gap areas.

3. The visual inspection system for varicose vein socks production process according to claim 1, characterized in that: The method for obtaining the gap uniformity parameter includes: The variance of the yarn gap area is negatively correlated to obtain the gap uniformity parameter.

4. A visual inspection system for varicose vein socks production according to claim 2, characterized in that: The method for obtaining brightness uniformity includes: The standard deviation of the pixel values ​​of the edge pixels is negatively correlated to obtain the brightness uniformity.

5. The visual inspection system for varicose vein socks production process according to claim 1, characterized in that: The method for obtaining the contour integrity comprises: The gap uniformity parameter and the brightness uniformity are multiplied and then normalized to obtain the profile integrity.

6. The visual inspection system for varicose vein socks production process according to claim 1, characterized in that: The method for obtaining the shape change trend includes: For two adjacent spinning gap areas at the same spinning height, a shape matching algorithm is used to obtain shape difference values ​​of the two adjacent spinning gap areas, and the center of mass distance of the two adjacent spinning gap areas is obtained, and the product of the center of mass distance and the shape difference value is used as the shape change trend.

7. The visual inspection system for varicose vein socks production process according to claim 1, characterized in that: The method for obtaining the force balance includes: At the same spinning height, the shape change trends are sorted according to the positions of the corresponding spinning gap areas to obtain a shape change trend sequence. In the shape change trend sequence, the differences between adjacent elements are obtained, and the accumulated values ​​of the differences between adjacent elements are negatively correlated and normalized to obtain shape change uniformity. The shape change uniformity is multiplied by the contour integrity and then normalized to obtain the force balance.

8. The visual inspection system for varicose vein socks production process according to claim 6, characterized in that: The method for obtaining the structural integrity comprises: At each spinning line height, the average center of mass distance between all adjacent spinning line gap areas is counted; the difference in the average center of mass distance between adjacent spinning line heights is obtained, and if the difference in the average center of mass distance is a negative number, the mark value between the adjacent spinning line heights is set to 0, otherwise it is set to 1; the mark values ​​between all adjacent spinning line heights are accumulated to obtain the structural integrity.

9. A visual inspection system for varicose vein socks production according to claim 8, characterized in that: The production requirements are: the contour integrity is greater than a preset first threshold, the force balance is greater than a preset second threshold, and the structural integrity is equal to 0.

10. A visual inspection system for varicose vein socks production according to claim 2, characterized in that: The method for obtaining edge pixel points includes: after preprocessing the surface image, performing edge detection using a canny operator to obtain the edge pixel points.

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