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2012 (Vol. 4, Issue: 20)
Article Information:

An AIHT based Histogram Equalization Algorithm for Image Contrast Enhancement

Cheng-Yi Yu, Hsueh-Yi Lin, Kuang-Hui Tang and Tzu-Wei Yu
Corresponding Author:  Cheng-Yi Yu 

Key words:  Adaptive Inverse Hyperbolic Tangent (AIHT) , Histogram Equalization (HE), human visual perception, image contrast enhancement, Modulated Histogram Equalization (MHE) contrast enhancement, ,
Vol. 4 , (20): 3969-3972
Submitted Accepted Published
December 20, 2011 April 23, 2012 October 15, 2012

Histogram Equalization (HE) is an effective technique for contrast enhancement. However, the traditional HE method usually results in extreme over-enhancement, which causes the unnatural look and visual artifacts in the processed image. To solve the problem, we propose a novel Modulated Histogram Equalization (MHE) image contrast enhancement algorithm based on Adaptive Inverse Hyperbolic Tangent (AIHT) algorithm. The AIHT has long been known that the Human Vision System (HVS) heavily depends on details and edges in understanding its perception of scenes. The new method is capable of doing image contrast enhancement adaptively and globally, while extruding the details of objects simultaneously.
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  Cite this Reference:
Cheng-Yi Yu, Hsueh-Yi Lin, Kuang-Hui Tang and Tzu-Wei Yu, 2012. An AIHT based Histogram Equalization Algorithm for Image Contrast Enhancement.  Research Journal of Applied Sciences, Engineering and Technology, 4(20): 3969-3972.
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ISSN (Online):  2040-7467
ISSN (Print):   2040-7459
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