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Cotton fiber color testing device and method

A testing device, cotton fiber technology, applied in color/spectral characteristic measurement, image data processing, instruments, etc., can solve the problems of high hardware cost, few color value distribution and discreteness, low precision, etc., and achieve high test accuracy , Small footprint, quick operation effect

Active Publication Date: 2020-01-03
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, only focusing on the average color characteristics of cotton, there are few characterizations of color value distribution and discreteness, the latter is important information about the mixing of immature cotton, frost yellow cotton and other inferior cotton
In addition, the existing cotton color measurement instruments and methods have defects such as high hardware cost or low precision.

Method used

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  • Cotton fiber color testing device and method
  • Cotton fiber color testing device and method
  • Cotton fiber color testing device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0121] Raw cotton sample: Xinjiang fine-staple cotton, average length 29mm, length uniformity 83.4%, specific breaking strength 29.1, micronaire value 4, impurity content 2.2%, moisture regain 4.7%.

[0122] Using a color measurement device, after the raw cotton sample is sampled and temperature-humidity balanced according to step 1, the reflected light image at the bottom of the sample basket is obtained according to step 2, and the resolution is set to 1500ppi. Then follow step 3 to determine the position of the impurities in the image, and obtain the binarized image as shown in Figure 2(a) and Figure 2(b). Figure 2(a) and Figure 2(b) are used to control the cotton fiber color index calculation.

[0123] According to step 4, use the binarized image, that is, ClassIndex (x, y) matrix control, to calculate the relative color value and average color value r, g, b of each point in the pure cotton fiber color image. Follow step 5 to convert the XYZ color space. Preliminary calc...

Embodiment 2

[0125] Raw material: Xinjiang long-staple cotton, average length 37.9mm, length uniformity 88.1%, specific breaking strength 40.6, micronaire value 4.0, impurity content 2.5%, moisture regain 6.8%.

[0126] Referring to Example 1, the Xinjiang long-staple cotton was subjected to sample preparation, image shooting, and image processing, and finally a standardized color index was obtained. The pictures before and after image processing are shown in Figure 4(a) and Figure 4(b)

[0127] Adopt the method of embodiment 1, after testing the color image of cotton raw material, initially calculate the cotton fiber color feature index of Hunter feature space: R d ' is 80.8%, yellow depth + b' is 13.5, red and green index a' is -3.7; finally follow step 8 to make the outstanding characteristic value R d and the distribution diagram of +b, a' see Figure 5(a) to Figure 5(c) , the coefficient of variation of the three is 5.32%, 2.35%, 0.79%. Compared with Example 1, the coefficient of va...

Embodiment 3

[0129] Raw materials: American fine-staple cotton, length 30.3mm, length uniformity 81.3%, breaking specific strength 32.3, micronaire value 4.3, impurity content 4.3%, moisture regain 7.6%.

[0130] Using the method of Example 1, the color image of American fine-staple cotton was tested and the image was processed. The results are shown in Figure 6(a) and Figure 6(b).

[0131] Preliminary calculation of the cotton fiber color characteristic index of Hunt feature space: R d ' is 80.1%, the depth of yellow + b' is 12.5, and the red-green index a' is -3.1; finally follow step 8 to make the characteristic value R d and the distribution diagram of +b, a' see Figure 7(a) to Figure 7(c) , the coefficients of variation of the three are 6.20%, 2.45%, and 0.63%.

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Abstract

The invention relates to a cotton fiber color testing device. The device is characterized by comprising a sample frame, wherein optical glass is arranged at the bottom of the sample frame, the top ofthe sample frame is open, a sample is arranged in the sample frame, a sponge mat and an upper cover are sequentially arranged above the sample, and the upper cover and the sponge mat slide up and downin the sample frame. According to another technical scheme, the invention provides a cotton fiber color testing method. According to the new cotton fiber color testing analysis method and device, compared with existing cotton fiber color testing equipment, color indexes are improved in the three aspects that the influence of impurities on cotton fiber color testing is removed; a new color index ais added, and representation of fiber colors in a three-dimensional color space is truly realized; and variation coefficients of all color values of Rd, +b and a are added, and representation of non-uniformity of maturity isochromatic characteristics of each batch of cotton is benefited.

Description

technical field [0001] The invention relates to a device for testing fiber color and a testing method using the device, in particular to a device and method for analyzing the color of cotton (including cotton lint and seed cotton after cotton is ginned and seeded) based on a color reflection image of cotton fibers. Background technique [0002] The most prominent change in the "GB1103.1-2012 Sawtooth Processed Fine-staple Cotton Standard" promulgated by my country in 2013 is the cancellation of the sensory inspection content of cotton grades (grading based on maturity, color characteristics, and milling quality), and changes A color scale for instrumentation testing. This standard has promoted the transition of cotton color grade inspection from manual to instrumental, and has also gradually realized the integration with the international standards. [0003] The USDA began in 1946 based on the albedo R d and yellow depth + b to evaluate the color of cotton. Since then, thes...

Claims

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Application Information

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IPC IPC(8): G01N21/27G06T7/90
CPCG01N21/27G06T2207/10004G06T2207/10024G06T7/90
Inventor 王府梅衡冲沈华
Owner DONGHUA UNIV
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