Circuit and method for realizing platform histogram equalization processing function of infrared image

Abstract

The invention relates to a circuit for realizing a platform histogram equalization processing function of an infrared image. The circuit comprises a histogram statistic module, a mapping function accumulation module, a histogram equalization processing module and a memory selection module. The invention also relates to a method for realizing the platform histogram equalization processing function of the infrared image. If the method and the device for realizing the platform histogram equalization processing function of the infrared image are adopted, a frame buffer (off-chip SDRAM (Synchronous Dynamic random access memory)) does not need to be externally connected; only memory resources in FPGA (Field Programmable Gate Array) are required; input can be flexibly configured according to a practical image; an input image is regulated to be relatively optimal; a problem of overlarge basic histogram equalization target background contrast ratio is avoided; the overlarge contrast ratio of an output infrared image can be effectively solved; the real-time processing of an equalization algorithm is realized; and system resources can be saved. The circuit has the advantages of good image processing effect, simple and practical structure, quick and convenient processing process, stable and reliable work performance and wide applicable range.

Description

technical field [0001] The invention relates to the field of image processing, in particular to the field of image enhancement and equalization processing and probability statistics technology, and specifically refers to a circuit and method for realizing the function of infrared image equalization processing on a platform histogram. Background technique [0002] In the field of infrared image enhancement, the traditional histogram equalization algorithm (HE) has become a more common algorithm due to its simplicity and effectiveness. The basic algorithm idea is to determine the gray value of the output image according to the gray probability distribution function of the input image. Make the distribution of each gray level relatively uniform and improve the contrast. [0003] The main steps of the algorithm: [0004] (1) Statistical histogram distribution of each gray level of the original image (gray level statistics can be reduced); [0005] (2) Calculate the cumulative ...

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Problems solved by technology

[0013] The purpose of the present invention is to overcome the shortcomings in the above-mentioned prior art, to provide a method that can effectively solve the problems of excessive contrast of the output infrared image and the real-time processing of the equalization algorithm, save system resources, have good image processing effects, simple and practical structure, and process A circuit and method for realizing the platform histogram equalization processing function of infrared images, which is fast and convenient, has stable and reliable working performance, and has a wide range of applications

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