Yun-feng ZHANG. Adaptive plateau histogram equalization for infrared image based on scene complexity computation[J]. Chinese journal of liquid crystals and displays, 2016, 31(7): 695-702.
DOI:
Yun-feng ZHANG. Adaptive plateau histogram equalization for infrared image based on scene complexity computation[J]. Chinese journal of liquid crystals and displays, 2016, 31(7): 695-702. DOI: 10.3788/YJYXS20163107.0695.
Adaptive plateau histogram equalization for infrared image based on scene complexity computation
Histogram equalization and its improved version may cause tinny gray levels coalition and over-enhancement in the output infrared image without any constraints. In order to solve this problem
we propose plateau histogram equalization based on scene complexity computation. Firstly
Harris algorithm is used to detect corner. Then an evaluation function
which is similar to the sigmoid function
is established to calculate the degree of complexity for an image. Finally
a global transformation function is gained using the theory of plateau histogram equalization. Moreover
the global transformation function achieves enhancement with the constraints of image complexity and mean lighting protecting. Experimental results show that the proposed method can enhance infrared images with different scenes effectively and there exist no over-enhancement and noise amplification in the output infrared images. Objective evaluation illustrates that the proposed method can achieve less mean lighting shift and holding the entropy of original image.
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