Printing dye aberration on-line detection method of machine vision system

A technology of machine vision system and detection method, which is applied in the direction of color measurement using color charts, color measurement devices, instruments, etc., can solve the problems of unguaranteed detection quality, low detection accuracy, and high labor intensity, so as to reduce the detection labor intensity , Improve the detection speed, improve the effect of accuracy

Inactive Publication Date: 2008-03-26
WUXI ZHONGWANG 4D TECH
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problems that the online detection of printing and dyeing color difference in the prior art relies on manual detection, the detection accuracy is low, the continuous online detection is impossible, the labor intensity is high, the detection quality cannot be guaranteed and the pass rate of produ

Method used

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  • Printing dye aberration on-line detection method of machine vision system

Examples

Experimental program
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Example Embodiment

[0019] Example 1. Detection of the color difference between left, middle and right dyeing of printed and dyed cloth (also called left, middle and right difference or side difference):

[0020] A. Test cloth: The red pure cotton printed and dyed cloth produced for a customer is used as the example test cloth.

[0021] B. Image shooting camera: Fix the Beijing New Era MVC2000DA-GE16CCD industrial color camera 50cm above the printed and dyed fabric. The camera uses 8mmCOMPUTAR lens, the aperture is adjusted to the maximum, the exposure time is adjusted to 0.58ms, and the gain value (which determines the image The contrast effect) is adjusted to 0; use Boshi BS2007LED white light (2001ux) light source fixed at 50cm above the printed and dyed fabric (45° incident angle), so as to be sensitive to the dyeing chromatic aberration of the fabric; the three above-mentioned cameras and light source devices are respectively Fixed at the left, middle and right three positions (one set for each)...

Example Embodiment

[0029] Example 2, the detection of the dyeing color difference (also known as the before and after difference) of the printed and dyed cloth:

[0030]The detection equipment and method steps are the same as those in Example 1. The only difference is that the RGB value (174, 27, 53) and saturation value ( 89) and chromaticity value (67) are stored in the computer. The RGB value (183, 31, 68), saturation value (96) and chromaticity value (99) value of the color of the dyeing back end (referring to the dyeing cloth at the end of the printing and dyeing cloth) are compared and analyzed. The difference of RGB value, saturation value and chromaticity value exceeds the standard range for judging the dyeing color difference of printed and dyed fabric set in step D above (for example, R difference value is 183-174=912, the difference of saturation is 96-89=718; where B value, chroma value If it is greater than the allowable accuracy range of half-level color difference), it belongs to the ...

Example Embodiment

[0031] Example 3, the detection of dyeing color difference (also known as batch difference or patch difference) between pieces of printed and dyed cloth:

[0032] The detection equipment and method steps are the same as in Example 1. According to the methods described in Example 1 and Example 2, the whole piece of printed and dyed cloth that has passed the left, middle and right dyeing color difference and the front and back dyeing color difference detection is qualified and is the standard value. The RGB value, saturation value and chromaticity value of the middle and right (or front and back) positions are stored in the computer as the left, middle and right (or front and back) dyeing color differences of the same kind of different batches or different pieces of printed cloth The standard image template for real-time shooting of the same kind of different batches or different pieces of the same batch of printed and dyed cloth images, if any two positions of the RGB value, satura...

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Abstract

The invention is the online detection method of the machine vision system to the printing and dyeing color difference. It can solve the big working strength and the bad detection quality of detecting the color difference by human. The invention makes the standard image module of the detecting print-dyeing color difference according to the client sampling cloth, which the RGB value, saturation value and color value are as the standard value of detecting dyeing color difference; it uses the national nine-degree colorimetric card as the standard of dyeing color difference; the RGB value, saturation value and color value are set as the detection parameters and it sets the parameter precision range according to the user need. While the environment light changing, the invention can compensate the light strength of shoot image automatically to determine the production dyeing color difference precisely. The invention meets the practical condition of the user dyeing color difference detection and improves the precision and detection speed of the color difference detection.

Description

technical field [0001] The invention relates to the technical field of on-line detection by using a machine vision system, in particular to a method for on-line detection of printing and dyeing color difference of printed and dyed cloth by using a machine vision system at the production site of dyed and printed cloth. Background technique [0002] In the production workshop of printing and dyeing cloth in assembly line operation, the color difference of printing and dyeing of printing and dyeing cloth needs to be detected online. In the prior art, the on-line detection of printing and dyeing color difference of printed cloth relies on manual detection, and the dyeing color difference (also called side-center difference) of the left, middle and right of the cloth is manually and manually compared at the cloth drop of the pad dyeing machine, and compared according to international standards. The color card (nine levels in total) determines the color difference of dyeing, and t...

Claims

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Application Information

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IPC IPC(8): G01J3/46G01J3/52G06K9/46
Inventor 董仲伟
Owner WUXI ZHONGWANG 4D TECH
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