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http://dx.doi.org/10.5573/IEIESPC.2014.3.6.358

Flickering Effect Reduction Based on the Modified Transformation Function for Video Contrast Enhancement  

Yang, Hyeonseok (Department of Computer Science and Engineering, Hanyang University)
Park, Jinwook (Department of Computer Science and Engineering, Hanyang University)
Moon, Youngshik (Department of Computer Science and Engineering, Hanyang University)
Publication Information
IEIE Transactions on Smart Processing and Computing / v.3, no.6, 2014 , pp. 358-365 More about this Journal
Abstract
This paper proposes a method that reduces the flickering effect caused by A-GLG (Adaptive Gray-Level Grouping) during video contrast enhancement. Of the GLG series, A-GLG shows the best contrast enhancement performance. The GLG series is based on histogram grouping. Histogram grouping is calculated differently between the continuous frames with a similar histogram and causes a subtle change in the transformation function. This is the reason for flickering effect when the video contrast is enhanced by A-GLG. To reduce the flickering effect caused by A-GLG, the proposed method calculates a modified transformation function. The modified transformation function is calculated using a previous and current transformation function applied with a weight separately. The proposed method was compared with A-GLG for flickering effect reduction and video contrast enhancement. Through the experimental results, the proposed method showed not only a reduced flickering effect, but also video contrast enhancement.
Keywords
Image enhancement; Video contrast enhancement; Histogram modification; Flickering effect reduction; Gray level grouping;
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