IMAGE CONTRAST ENHANCEMENT USING HISTOGRAM EQUALIZATION
International Journal of Advance Engineering and Research Development · 2015
General framework based on histogram equalization for image contrast enhancement is discussed.In this framework, contrast enhancement is posed as an optimization problem that minimizes a cost function. Histogram equalization is an effective technique for contrast enhancement. However, conventionalhistogram equalization (HE) usually results in excessive contrast enhancement, which in turn gives the processed image an unnatural look and creates visual art ifacts. By introducing specifically designed penalty terms, the level of contrast enhancement can be adjusted; noise robustness, white/black stretching and mean -brightness