| Budget Amount *help |
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2016: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2014: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Outline of Final Research Achievements |
Flicker artifact can appear in compressed videos even at medium bit rate. It is perceptible as a small variation in pixel value, and is extremely visible in high definition videos. This visual artifact impairs significantly the visual quality of compressed videos. Therefore, it is important to suppress the flicker artifact and to improve the visual quality of compressed videos.
In this research, we introduce a new approach to flicker reduction of compressed videos by using wavelet thresholding. The flicker artifact can be thought of as Gaussian noise in the temporal domain. We view this flicker reduction as a denoising problem in the temporal domain, and apply the wavelet thresholding algorithm in solving this flicker reduction problem. The wavelet thresholding algorithm has exhibited the excellent denoising property. It is shown from our experimental results that our wavelet-based method suppresses the flicker artifact and achieve an improvement, compared with the conventional methods.
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