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Illumination equalization processing method for quick-response matrix code in image

A technology with fast response and processing methods, which is applied in the field of image processing and can solve problems such as uneven illumination

Inactive Publication Date: 2012-12-26
NANJING HIPROS DIGITAL DEVICES +1
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Problems solved by technology

[0002] In today's society, the rapid response matrix code has been used in all aspects of people's daily life. For the camera to collect the rapid response matrix code, if you want to recognize it well, the key first step is to get the binary image of the image well. Only in this way can it provide convenience for the following identification, but the images collected by the camera generally have the disadvantage of uneven illumination, so this paper studies how to obtain a binary image with a better ratio of black and white

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  • Illumination equalization processing method for quick-response matrix code in image

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[0037] In a specific implementation manner, the detailed process of the illumination equalization processing method of the rapid response matrix code in the image will be clearly and completely described in conjunction with the accompanying drawings,

[0038] A method for processing illumination equalization of fast response matrix codes in an image, characterized in that it proceeds in accordance with the following steps:

[0039] Step 1: Initialize, collect a frame of image with a size of W×H×3, where W and H are positive integers (W=640, H=480), respectively representing the number of columns and rows of the image, and then for each color image For a pixel point, use the formula Y=0.299*R+0.587*G+0.114*B (R, G, and B represent the red, green, and blue component values ​​of each pixel respectively), and Y is used as the gray value of the point, so that The color image is converted to a grayscale image of size W×H,

[0040] Step 2: Perform light equalization processing on th...

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Abstract

The invention relates to an illumination equalization processing method for a quick-response matrix code in an image. The method comprises the following steps of: firstly, initializing a read image and converting an input RGB (Red Green Blue) image to a gray level space; secondly, performing illumination equalization processing on a gray level image, segmenting a non-uniform illumination image into a plurality of sub-blocks, then calculating a background illumination value in each sub-block, interpolating a background illumination value of each point inside each sub-block through the background illumination values of several adjacent sub-blocks, and then performing self-adaptive adjustment on a gray level value of each point according to the background illumination value of each point, thus eliminating a non-uniform illumination condition existing in the original image; and finally, performing binarization processing on the image by an Otsu method. The method disclosed by the invention can achieve a very good effect when being used for processing the quick-response matrix code image with non-uniform illumination.

Description

technical field [0001] The invention belongs to an image processing method, which performs light equalization processing on a fast response matrix code generated according to the national standard GB / T18284-2000 "Quick Response Matrix Code" under uneven light conditions, and finally can obtain an ideal binary image. Background technique [0002] In today's society, the rapid response matrix code has been used in all aspects of people's daily life. For the camera to collect the rapid response matrix code, if you want to recognize it well, the key first step is to get the binary image of the image well. Only in this way can it provide convenience for the following identification, but the images collected by the camera generally have the disadvantage of uneven illumination, so this paper studies how to obtain a binary image with a good black-and-white ratio. Contents of the invention [0003] The invention relates to an illumination equalization processing method of a fast-re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00
Inventor 路小波毕汪虹沈赛峰吴玉章曾维理
Owner NANJING HIPROS DIGITAL DEVICES
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