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Camera-based method, device and system for detecting product color based on

A color detection and product technology, applied in the measurement of color/spectral characteristics, etc., can solve problems such as affecting production efficiency and slow speed, achieve quantitative automatic detection, overcome randomness and improve accuracy and efficiency.

Active Publication Date: 2015-03-25
ALEADER VISION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, these two methods have relatively large defects: the method of human eye recognition has great uncertainty, and it is difficult to measure the color of the product stably and quantitatively; Seriously affect production efficiency, only random inspection of products can be realized

Method used

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  • Camera-based method, device and system for detecting product color based on
  • Camera-based method, device and system for detecting product color based on
  • Camera-based method, device and system for detecting product color based on

Examples

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Embodiment 1

[0053] figure 1 This is a schematic flowchart of a camera-based product color detection method provided by a specific embodiment of the present invention. like figure 1 As shown, a camera-based product color detection method according to the present invention includes:

[0054] Obtain the conversion relationship about RGB-Lab according to the standard color block;

[0055] Measure the RGB value of the standard product, and obtain the Lab value of the standard product according to the obtained RGB-Lab conversion relationship;

[0056] According to the obtained Lab value of the standard product, set the upper and lower limits of the Lab value that the product can receive;

[0057] Measure the RGB value of the product to be tested, and obtain the Lab value of the product to be tested according to the RGB-Lab conversion relationship;

[0058] Compare the Lab value of the product to be tested with the upper and lower limits of the Lab value that the product can accept. If it is w...

Embodiment 2

[0099] The following are apparatus embodiments of the embodiments of the present invention. The method embodiments and apparatus embodiments of the present invention belong to the same concept. For details that are not described in detail in the apparatus embodiments, reference may be made to the above method embodiments.

[0100] figure 2 It is a schematic structural diagram of a camera-based product color detection device provided by a specific embodiment of the present invention. like figure 2 As shown, a camera-based product color detection device according to the present invention includes:

[0101] The RGB-Lab conversion relationship obtaining unit is used to obtain the conversion relationship about RGB-Lab according to the standard color block;

[0102] The standard product Lab acquisition unit is used to measure the RGB value of the standard product, and obtain the Lab value of the standard product according to the obtained RGB-Lab conversion relationship;

[0103] ...

Embodiment 3

[0118] The following are system embodiments of the embodiments of the present invention. The method embodiments and system embodiments of the present invention belong to the same concept. For details that are not described in detail in the system embodiments, reference may be made to the above method embodiments.

[0119] image 3 It is a schematic structural diagram of a camera-based product color detection system provided by a specific embodiment of the present invention. like image 3 As shown, a camera-based product color detection system according to the present invention includes: a camera, a light source, and a stage on which the product to be tested is placed, and the light source is used to illuminate the product to be tested placed on the stage. , the camera is used to take an image of the product to be tested under the light source; it also includes a processor connected to the camera for processing the image;

[0120] The processor is used for obtaining the conve...

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Abstract

The invention relates to a camera-based method, device and system for detecting product color. The method comprises the following steps: obtaining a conversion relation formula related to RGB-Lab according to a standard color block; measuring an RGB value of a standard product, and obtaining a Lab value of the standard product according to the obtained conversion relation formula of the RGB-Lab; setting the acceptable upper and lower limits of the Lab value of the product according to the obtained Lab value of the standard product; measuring an RGB value of a to-be-measured product, so as to obtain the Lab value of the to-be-measured product according to the conversion relation formula of the RGB-Lab; and comparing the Lab value of the to-be-measured product with the acceptable upper and lower limits of the Lab value of the product, judging that the color of the to-be-measured product is qualified if the Lab value of the to-be-measured product is in the range of the acceptable upper and lower limits of the Lab value of the product, otherwise, judging that the color of the to-be-measured product is unqualified. Therefore, the product color can be efficiently, stably, quantitatively and automatically detected, the problems of arbitrariness of human eye detection and low colorimeter detection speed are solved, and the accuracy and the efficiency of the product color detection are greatly improved.

Description

technical field [0001] The invention relates to the technical field of product quality detection, in particular to a camera-based product color detection method, device and system. Background technique [0002] At present, to test whether the color of a product meets the requirements of product quality, it is generally determined by the human eye by comparing the difference between the standard product and the product to be tested under a standard light source box. To determine the color model value of the color of the product to be tested (hereinafter referred to as: Lab value), and then determine whether the product color is qualified. The standard light source box is to provide a standard light source environment for the human eye, which is convenient for the human eye to compare the color difference between the product to be tested and the standard product. The colorimeter uses a silicon photodiode array to measure the Lab value of the color of the product to be tested,...

Claims

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Application Information

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IPC IPC(8): G01N21/27
Inventor 王锦峰易群生
Owner ALEADER VISION TECH
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