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Image enhancement using the modified cosine function and semi-histogram equalization for gray-scale and color images

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4 Author(s)
Williams, B. ; Sch. of Comput. & Software Eng., Southern Polytech. State Univ., Marietta, GA, USA ; Chih-Cheng Hung ; Yen, K.K. ; Coleman, T.

The paper outlines two image enhancement operators for gray scale and color images. A modified cosine function was developed for image enhancement, in which some enhanced images may appear a little darker if the average pixel value in the image generally falls below the intermediate value (which is 128 in most images used in the experiments (256 gray-level)). A Semi-Histogram-Equalization (SHE) method is then proposed for enhancement so that regardless of how dark or bright the image is, it would give a good contrast enhancement. Experimental results show that the proposed operators can enhance gray scale and color images effectively

Published in:

Systems, Man, and Cybernetics, 2001 IEEE International Conference on  (Volume:1 )

Date of Conference:

2001