Method and device for collecting two-dimensional code images of bills with multiple wavelengths and multiple light sources

Abstract

The invention discloses a multi-wavelength multiple-light-source bill two-dimensional code image acquisition method and an apparatus thereof. The method comprises the following steps of collecting color characteristic information of a bill two-dimensional code image covering a stamp, and determining light source kinds in a mixed light source, each light source frequency and a wavelength parameter; according to each light source frequency in the mixed light source and a wavelength characteristic, and adjusting an electrical parameter of the mixed light source so as to acquire the required mixed light source; applying the adjusted mixed light source to the two-dimensional code image covering the stamp; and under a mixed light source effect, scanning and identifying the two-dimensional code image covering the stamp and reading bill two-dimensional code information. The apparatus comprises an image acquisition module, a multi-light-source control module, a multi-light-source generation module and a two-dimensional code identification module. By using the method and the apparatus, interferences of a stamp image and other redundancy information on the bill two-dimensional code image information can be greatly reduced; information of the bill two-dimensional code image covering the stamp is accurately read; and the method and the apparatus are suitable for bill two-dimensional code information acquisition under various conditions.

Description

Technical field [0001] The invention relates to the technical field of bill detection, and in particular to a method and device for collecting two-dimensional code images of bills with multiple wavelengths and multiple light sources. Background technique [0002] The two-dimensional code image of bills is an important method in the field of bill anti-counterfeiting and identification. Its accurate and fast two-dimensional code image collection and recognition play a pivotal role in bill information security. [0003] Common two-dimensional code image acquisition and recognition methods include traditional optical two-dimensional code image acquisition and recognition methods and two-dimensional code image acquisition and recognition methods based on computer image processing. Traditional optical acquisition and scanning methods such as patents CN206236100U, CN206209749U, etc., use optical components such as cameras and fill lights to collect and recognize QR code images in optical ...

AI Technical Summary

Problems solved by technology

When the threshold is set too large, it is difficult to filter out the background of the QR code, and if the threshold is set too small, it is easy to cause excessive segmentation of the image

In this method, when the color depth of the seal is close to the color depth of the two-dimensional code, it is difficult to determine the threshold value during threshold segmentation

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