Method and system for detecting oil stains on bill images
A detection method and technology for bills, applied in the field of image processing, can solve the problems of low detection efficiency, unfavorable batch processing of bills, unavoidable accidental errors in human visual inspection, etc., to achieve the effect of improving efficiency, reducing time and errors
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[0042] refer to figure 1 , the present invention a kind of bill image oil pollution detection method, comprises the following steps:
[0043] A. Carry out color scanning and infrared scanning on the bill respectively to obtain the color image of the bill and the infrared grayscale image of the bill;
[0044] B. Perform grayscale conversion on the color image of the bill, and then obtain the grayscale image of the bill;
[0045] C. Carry out threshold segmentation processing on the bill grayscale image and the bill infrared grayscale image to obtain the bill oil stain binary image;
[0046] D. Carry out connected domain marking on the oil stain binary image of the bill, and then perform oil pollution detection and judgment according to the area of the connected domain.
[0047] refer to figure 2 , further as a preferred embodiment, the step D includes:
[0048] D1. Carrying out corrosion processing on the oil stain binary image of the bill to obtain the oil stain binary ...
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