Lattice code detection method and system

Abstract

The invention discloses a lattice code detection method and system, and the method comprises the steps: carrying out the preset binarization processing of a grayscale image of a target image, wherein the preset binarization processing represents the binarization processing of a global iteration threshold adopted according to the definition of the grayscale image, and / or the preset binarization processing represents the adaptive local binarization processing; performing filtering processing on the binary image; traversing the binarized image after filtering processing according to the determined sliding window, calculating the average energy density of a selected area of the sliding window, and determining a candidate area according to an energy density threshold value; calculating the average energy density of the corroded candidate regions, and determining a plurality of first regions according to an energy density threshold; calculating the energy density among the sub-frames of the first area and the overall energy density of the first area, and determining a target area; and carrying out merging processing on the target area to obtain a target dot matrix code area. Different dot matrix positioning requirements can be met, and the decoding accuracy is improved.

Description

technical field [0001] The invention relates to the field of information technology, in particular to a dot matrix code detection method and system. Background technique [0002] With the development of technology, dot matrix code is widely used as a technology that expresses numerical values ​​or information in the form of a dot matrix code by printing and arranging multiple fine dots on paper. At present, the method of reading the dot matrix code in the automatic printing detection system is to first process the image of the target image, mark all the dot matrix code points in the image, and then calculate the examples between each point, so as to obtain the dot matrix code Yes, the corresponding code value is calculated through the arrangement of dot matrix code pairs, so as to achieve the purpose of decoding. [0003] However, when the background pattern of the target image is complex or the image quality is poor, some non-code points in the image background will be mis...

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Problems solved by technology

[0003] However, when the background pattern of the target image is complex or the image quality is poor, some non-code points in the image background will be misjudged as code points when using the above-mentioned method to read the dot matrix code, which will affect the correctness of decoding. Rate

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