Infrared traffic image's enhancement algorithm combining dark channel prior and Gamma correction

Publication Type:
Journal Article
Citation:
Jiaotong Yunshu Gongcheng Xuebao/Journal of Traffic and Transportation Engineering, 2016, 16 (6), pp. 149 - 158
Issue Date:
2016-12-01
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© 2016, Editorial Department of Journal of Traffic and Transportation Engineering. All right reserved. In order to enhance the visual quality of infrared traffic image collected by the intelligent traffic monitoring equipment effectively, the image defogging method of visible light was introduced into traffic infrared image enhancement processing, and a new infrared traffic image's enhancement algorithm combining dark channel prior and Gamma correction was proposed. First, the original degraded infrared traffic image was processed by dark channel prior algorithm to obtain initially enhanced image. Then, the brightness of initially enhanced image was adjusted by Gamma correction algorithm. The image enhancement effects of the new algorithm and other common infrared image enhancement algorithms were compared. Test result shows that the information entropies of two original infrared traffic images are respectively 4.71 and 5.07 and respectively increase to 6.45 and 5.92 after being processed by the new algorithm. The standard deviations of gray scale for two original infrared traffic images are respectively 6.90 and 19.14 and respectively increase to 31.17 and 32.35 after being processed by the new algorithm. The information entropy computational value of new algorithm is more than the values of other algorithms. So the enhancement effect of the proposed algorithm is better than the enhancement effects of other common infrared image enhancement algorithms, and it can significantly improve the visual effect of infrared traffic image and lay good foundation for following processing and analysis of image.
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