L0 norm restricted LIC with ADMM

LIC (Local Intensity Compensation) is an intra-frame motion compensation for video coding, and was a candidate for HEVC. To obtain reference blocks and their coefficients in linear combination, Inoue et al. have applied AHIT (Accelerated Hard Iterative Thresholding) as a solver. However, this algori...

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Bibliographic Details
Published in2018 International Workshop on Advanced Image Technology (IWAIT) pp. 1 - 4
Main Authors Kubota, Shohei, Yoshida, Ryoichiro, Kuroki, Yoshimitsu
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.01.2018
Subjects
Acceleration
Convex functions
Discrete cosine transforms
Image coding
Image reconstruction
Motion compensation
Video coding
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Summary:LIC (Local Intensity Compensation) is an intra-frame motion compensation for video coding, and was a candidate for HEVC. To obtain reference blocks and their coefficients in linear combination, Inoue et al. have applied AHIT (Accelerated Hard Iterative Thresholding) as a solver. However, this algorithm is heuristic; then, this paper proposes to use a sophisticated convex optimization solver ADMM (Alternating Direction Method of Multipliers). Experimental results demonstrate that our method provides higher PSNR values in the same reference block numbers than the conventional method.
DOI:10.1109/IWAIT.2018.8369768