Ms. Chen Wang Profile

Chen Wang

at Shanghai Institute of Technical Physics

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Proceedings Article | 24 November 2014 Paper

The research of infrared image enhancement algorithm based on human vision

Chen Wang, Sili Gao, Xinyi Tang

Proceedings Volume 9301, 93013C (2014) https://doi.org/10.1117/12.2073170

KEYWORDS: Image enhancement, Infrared imaging, Infrared radiation, Detection and tracking algorithms, Image processing, Visualization, Infrared detectors, Image quality, Human vision and color perception, Linear filtering

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Infrared images have their own characteristics: low contrast, great noise, large dynamic range and poor visual effect. The traditional image enhancement algorithms have certain limitations and can't achieve a good visual effect. In order to obtain a good visual effect and improve the target detection and recognition capabilities, the paper studied various enhancement methods. After analyzing the retinex theory, we choose the image enhancement method based on human visual system called retinex to process infrared images. Retinex has been used to enhance the visible light image. To do experiment on infrared image enhancement, multi-scale retinex method gets ideal visual effect. On this basis, we propose an improved multi-scale Retinex (AMSR) method based on adaptive adjustment. This method can adaptively adjust the gray level and contrast of the image, enhance the details, make the weak small targets more conducive to the human eye observation. While, it is impossible to find a method suited for all infrared images with different characteristics. So, we use several traditional image enhancement algorithms to compare with the retinex algorithms. And calculate the objective evaluation factors, including average, standard deviation, entropy and so on. After observation the processing results and analyzing these evaluation factors, the AMSR algorithm is proved having its applicability and superiority. In order to select a suitable infrared image enhancement algorithms, we analyze the applicability of each enhancement methods for infrared image has obvious characteristics, To some extent, the study is significant to the infrared target detection and recognition.

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