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A machine vision-based detection method for thermal transfer film glue deviation

A technology of machine vision and detection methods, which is applied in the directions of instruments, image analysis, image enhancement, etc., can solve problems such as easy fatigue, strong subjectivity, and difficulty in forming detection standards, so as to improve detection accuracy, eliminate subjective differences, and improve accuracy Effect

Active Publication Date: 2022-03-11
GUANGDONG UNIV OF TECH
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0007] (1) Workers have been working repeatedly in the same environment for a long time, and observe the surface of the film to be inspected through eyes. There is a certain degree of reflection on the surface, and the defects in the small size of the film are often relatively subtle, which makes people easily fatigued physically and mentally, resulting in false inspections, missed detection
[0008] (2) Due to the strong subjectivity of people, it is difficult to form a consistent detection standard
[0009] (3) People are easily disturbed by the external environment and internal factors, which affect the pass rate of product testing
[0010] (4) With the continuous increase of labor costs, the product processing cost of enterprises will be greatly increased

Method used

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  • A machine vision-based detection method for thermal transfer film glue deviation
  • A machine vision-based detection method for thermal transfer film glue deviation
  • A machine vision-based detection method for thermal transfer film glue deviation

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Embodiment Construction

[0066] The present invention will be further described below in conjunction with specific embodiment:

[0067] Such as figure 1 As shown, a machine vision-based method for detecting glue deviation of thermal transfer film described in this embodiment includes the following steps:

[0068] S1: Set the film width qualified threshold:

[0069] The default value of this threshold is 0, which can be modified by using the glue width of the qualified film as a reference after the qualified film is detected;

[0070] S2: Obtain the backlight image of the thermal transfer film:

[0071] Place the thermal transfer film on the backlight, and collect the image through the industrial camera. The schematic diagram of the obtained original image is as follows: Figure 4 shown;

[0072] S3: Deduct the film in the image (the thermal transfer film in the original image may be located at any angle and position in the image), the specific process is as follows:

[0073] S3-1: Using the sobe...

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Abstract

The invention relates to a machine vision-based method for detecting glue deviation of a thermal transfer film, comprising the following steps: S1: setting a film width qualified threshold; S2: obtaining a backlight image of the thermal transfer film; S3: deduction of the film in the image; S4: Image clustering to obtain the glue layer of the picture; S5: Calculate the width of the glue layer in the widest direction; S6: Compare the width and output the detection result, compare the glue width of the currently obtained film with the qualified width threshold, if it is greater than the threshold, then evaluate as a defect, otherwise it is assessed as qualified. The invention has the advantages of high accuracy, repeatability, avoidance of false detection and missed detection caused by fatigue of workers, low cost, easy statistics and the like.

Description

technical field [0001] The invention relates to the technical field of thermal transfer film detection, in particular to a machine vision-based method for detecting glue deviation of thermal transfer film. Background technique [0002] Thermal transfer printing refers to printing the ink on the transfer medium (including thermal transfer paper or thermal transfer film), and then the transfer medium printed with graphics and texts is in close contact with the substrate, through a certain ambient temperature and external pressure. , so that the graphics and text are transferred to the substrate to form the final printed product. Thermal transfer printing technology was introduced into my country in the late 1980s and early 1990s, and developed rapidly in China, with a wide range of applications. [0003] The most classic use of thermal transfer technology is in textile printing production. With the gradual improvement of domestic transfer printing ink generation technology, t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T7/00G06T7/70G06T7/13G06T7/12
CPCG06T7/0004G06T7/12G06T7/13G06T7/70G06T2207/30144
Inventor 王晗张芳健陈新度蔡念李逸
Owner GUANGDONG UNIV OF TECH
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