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Color change detection method and color change detection system for red waterlines of bill images

A detection method and detection system technology, applied in the field of image processing, can solve the problems of inevitable accidental errors, low detection efficiency, unfavorable batch processing of bills, etc., so as to reduce the time for manual sorting of bills, improve efficiency, and solve the phenomenon of invalid bills. Effect

Inactive Publication Date: 2015-09-30
AUTOMATED TOUCHSTONE MACHINES
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AI Technical Summary

Problems solved by technology

[0003] At present, the red water line discoloration detection of bank bill images is generally done by the business personnel through visual inspection. This detection method has low detection efficiency and is not conducive to batch processing of bills, and accidental errors caused by human visual inspection are unavoidable.

Method used

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  • Color change detection method and color change detection system for red waterlines of bill images
  • Color change detection method and color change detection system for red waterlines of bill images
  • Color change detection method and color change detection system for red waterlines of bill images

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Embodiment Construction

[0056] refer to figure 1 , a red water line discoloration detection method of a bill image in the present invention, comprising the following steps:

[0057]A. Collect the image of the bill to obtain the color image of the bill;

[0058] B. Convert the color image of the bill from RGB space to XYZ color space, and extract the Y channel value, and then obtain the Y channel image of the bill;

[0059] C. According to the preset position coordinates of the red water line area, the image of the red water line area of ​​the bill is extracted from the Y channel image of the bill;

[0060] D. Perform threshold segmentation processing on the image of the red waterline area of ​​the bill to obtain a binary image of the red water line area of ​​the bill;

[0061] E. According to the binary image of the red water line area of ​​the bill, it is judged whether the red water line area has changed color.

[0062] Further, the specific calculation method for extracting the Y channel value ...

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Abstract

The invention discloses a color change detection method and a color change detection system for red waterlines of bill images. According to the method, acquisition, graying, extraction and binarization processing are performed on the bill images in sequence; according to the system, the bill images are processed through an image acquisition module, a color space conversion module, a water redline area extraction module, a binarization processing module and a color change detection module, and whether the red waterlines of the bill images are changed in color or not is detected further according to black picture elements in the images; manual operation is not needed; the phenomenon that the bill invalidity is caused by the fact that the amount in words of face value information are stained in the automatic processing procedure of batch bills is effectively solved; the time of manually collating the bills is greatly shortened, and the processing efficiency of the batch bills is promoted. The color change detection method and the color change detection system disclosed by the invention can be widely applied to bill detection.

Description

technical field [0001] The invention relates to the field of image processing, in particular to a method and system for detecting red water line discoloration of a bill image. Background technique [0002] When processing the bills, the automatic bill processing system of the bank or unit requires the bills to be processed to be filled in specifications, and the face of the bill is clean and unaltered. If the face of the bill to be processed is defaced or has traces of alteration, the automated bill processing system cannot perform subsequent processing or operations. Therefore, how to quickly and effectively analyze the face of the bill image has become an important research object in the industry, and the red water line discoloration detection is one of the key points. [0003] At present, the red water line discoloration detection of bank bill images is generally done by the business personnel through visual inspection. This detection method has low detection efficiency ...

Claims

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Application Information

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IPC IPC(8): G07D7/20
Inventor 王佳易堃冯少川师改梅
Owner AUTOMATED TOUCHSTONE MACHINES
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