Concrete mark extraction method based on photochromic material

Abstract

The invention discloses a concrete mark extraction method based on a photochromic material, which comprises the following steps: acquiring an image, and zooming the image; performing color recognition, and extracting color blocks; carrying out minimum circumscribed circle fitting on the extracted color blocks; rotating the image to determine the position of a positioning point; dividing the imageinto M * N rectangular blocks, establishing a coordinate system and generating an array; generating a two-dimensional code according to the array; filling the positioning area; and identifying the two-dimensional code to finish decoding. According to the method, the recognition information is extracted through the recognition image color, and the recognition information based on the photochromic material is converted into the two-dimensional code image, so that the situation that the recognition information cannot be accurately identified due to recognition abrasion in a traditional mode can be avoided; on the premise that the recognition mode is simple, extraction of complex information is achieved, and the safety of concrete recognition is enhanced.

Description

technical field [0001] The invention relates to image processing, in particular to a method for extracting concrete marks based on photosensitive color-changing materials. Background technique [0002] Concrete is prone to wear and tear during transportation or long-term storage, and the logo is easy to be washed away, making it impossible to be identified, so that it is impossible to check whether the concrete product is genuine; limited by the way of logo extraction, the traditional marking and identification methods for concrete are relatively low-level, and the characteristics of the logo The information is less, the security is poor, and the mark is very easy to be copied or replaced; after the concrete is marked, there will be some mark points on the surface of the concrete, and the traditional recognition method cannot accurately identify the mark points, resulting in a large recognition error. Contents of the invention [0003] The object of the present invention i...

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Problems solved by technology

[0002] Concrete is prone to wear and tear during transportation or long-term storage, and the logo is easy to be washed away, making it impossible to be identified, so that it is impossible to check whether the concrete product is genuine; limited by the way of logo extraction, the traditional marking and identification methods for concrete are relatively low-level, and the characteristics of the logo The information is less, the security is poor, and the identification is very easy to be copied or replaced; after the concrete is marked, there will be some identification points on the concrete surface, and the traditional identification method cannot accurately identify the identification points, resulting in a large identification error

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