Carding cashmere length detection method and device based on pixel calculation

Abstract

The invention relates to a carded cashmere length detection method and device based on pixel calculation. The carded cashmere length detection method based on pixel calculation comprises the steps ofacquiring an original image of a carded cashmere hand layout drawing; preprocessing an original image; performing binarization processing on a preprocessed image to obtain a binary image; carrying outsecondary opening operation processing on the binary image; and calculating the average length of the carded cashmere according to the image obtained after secondary opening operation processing. Onthe basis of a carding cashmere binary image, calculation of the average length of carding cashmere is completed through calculation of pixel points. The invention has the advantages that a small number of noisy points are allowed to exist in the binarized image, and the influence on the final measurement result is small; besides, manual point tracing, drawing and calculation are avoided, so thatmanual measurement errors are avoided, and the method is high in detection speed, small in error and high in efficiency.

Description

technical field [0001] The invention relates to the technical field of detecting the length of carded cashmere, in particular to a method and device for detecting the length of carded cashmere based on pixel calculation. Background technique [0002] The length of carded cashmere fiber is one of the important quality indicators to measure carded cashmere, and its length directly affects the spinnability and price of the fiber. The existing carded cashmere length detection can be measured by the manual method. The measurement method is: firstly, the glass plate is pressed horizontally on the cashmere standard plate, and the length distribution of the cashmere is drawn according to the cashmere arranged on the standard plate. Curve; then use the scale paper to draw a smooth fiber length distribution curve; take the bottom edge of the length distribution graph as the abscissa, and take each point on the fiber length curve as the ordinate, from the origin to the right every 10mm...

AI Technical Summary

Problems solved by technology

The manual measurement method of carded cashmere length requires manual drawing, drawing, and calculation. The disadvantage is that there are human measurement errors, and the detection time is long, the efficiency is low, and the personnel cost is high.

[0003] In the prior art, there is also an invention patent application with the application number CN201710821182.2, which discloses a method for detecting the length of carded cashmere. The idea is to grayscale the original carded cashmere image and perform spatial domain filtering processing , and then converted into a binarized image, however, this method requires that there should be no noise in the area not covered by carded cashmere in the binarized image. If there is noise, it will produce a large The error, and the position of the noise point affects the size of the length error

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