IEIE Transactions on Smart Processing and Computing

The Institute of Electronics and Information Engineers (대한전자공학회)
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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)
  • Received : 2014.02.20
  • Accepted : 2014.08.28
  • Published : 2014.12.31
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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.

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References

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