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《Opto-Electronic Engineering》 2007-12
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Image enhancement method of small target in strong light level background

PENG Gang1, 2,ZHANG Qi-heng2,LIU Ze-jin1,LU Gang2 ( 1. Department of Thotoelectricity Science and Engineering Project, National Univesity of Defence Technology, Changsha, Changsha 410073, China; 2. The Institute of Optics and Electronics, the Chinese Academy of Sicences, Chengdu, Chengdu 610209, China )  
An algorithm for image enhancement of small target in strong light level background is proposed in this paper. After analyzing the characters of choosing parameters for incomplete Beta’s function, the reasons of the jumpiness for α and β’ s value which Tubbs use to estimate the transformation in the condition of the exceedingly bright or dark original image are founded. It is explained that their changes are continuous. Then, the processing way for solving their best value by simulated annealing algorithm is given. So the optimum corresponding transformation curve is obtained, and the aim of the original picture’s self-adaptive enhancement is achieved. Furthermore,by using the way of images stream based on adding three continuous frames, the small target energy is enhanced and the noise energy is smoothed down .The experimental results show that the method can enhance effectively small target images in strong light level background.
【Fund】: 国防预研基金资助项目
【CateGory Index】: TP391.41
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