Color sorting method for black melon seeds

Abstract

The invention relates to the technical field of image processing, in particular to a color sorting method for black melon seeds. The method comprises the first step of converting data collected by an image sensor to obtain an original image, the second step of selecting a threshold from the original image and performing binarization processing on the threshold to obtain an image where only the background regions in the original image are remained, the third step of performing expansion processing on the image obtained from the second step, the fourth step of selecting another threshold from the original image and performing binarizaiton processing on the threshold to obtain an image where only the white regions of the black melon seeds in the original image are remained, and the fifth step of performing intersection processing on the two images obtained from the third step and the fourth step respectively to obtain an image where only the regions exist in the two images at the same time are remained after the intersection processing, wherein the regions remained in the image obtained from the fifth step are the white edge regions of the black melon seeds, and the black melon seeds which comprise the white edge regions are the defective black melon seeds and need to be picked out. According to the method, by processing and expanding the original image, the judged regions which are renewedly defined are the background regions after expansion, then, whether the white parts of the black melon seeds exist in the regions is judged, and therefore the good black melon seeds and the defective black melon seeds with the white edges can be accurately judged.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to a color sorting method for black melon seeds. Background technique [0002] Black melon seeds are a famous specialty in my country. They are famous for their large slices, thin skin, flat plate, loose mouth, thick flesh, shiny black, timeless flavor, and excellent quality. They are one of my country's traditional export commodities. The main producing country of black melon seeds ranks first in the world in both output and export sales. When black melon seeds are harvested, some black melon seeds with white edges will be mixed. This kind of black melon seeds with white edges not only has a poor taste and bitter taste, but also has no nutritional value. This kind of black melon seeds with white edges will affect the overall quality and selling price of black melon seeds. [0003] When the traditional color sorter performs color sorting, it distinguishes good and bad prod...

AI Technical Summary

Problems solved by technology

The color sorter marks the white area, and then screens the black melon seeds, but since there is also a white area in the middle of the good black melon seeds, when screening, the good black melon seeds will also be screened out, and only the black melon seeds cannot be accurately selected. Black melon seeds with white edges, such as figure 2 As shown in a and 2d, figure 2 a is the original image, figure 2 d is an image that only marks the white area. You can see that many good black melon seeds with white in the middle have also been selected, so it is unreasonable to perform color selection.

Even through multiple multiple selections, the color selection accuracy cannot be improved

Images