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IEICE TRANSACTIONS on Fundamentals

An Iterative MPEG Super-Resolution with an Outer Approximation of Framewise Quantization Constraint

Hiroshi HASEGAWA, Toshiyuki ONO, Isao YAMADA, Kohichi SAKANIWA

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Summary :

In this paper, we present a novel iterative MPEG super-resolution method based on an embedded constraint version of Adaptive projected subgradient method [Yamada & Ogura 2003]. We propose an efficient operator that approximates convex projection onto a set characterizing framewise quantization, whereas a conventional method can only handle a convex projection defined for each DCT coefficient of a frame. By using the operator, the proposed method generates a sequence that efficiently approaches to a solution of super-resolution problem defined in terms of quantization error of MPEG compression.

Publication
IEICE TRANSACTIONS on Fundamentals Vol.E88-A No.9 pp.2427-2435
Publication Date
2005/09/01
Publicized
Online ISSN
DOI
10.1093/ietfec/e88-a.9.2427
Type of Manuscript
PAPER
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