研究者情報 | 神奈川大学

コマツ　タカシ Komatsu Takashi 小松　隆所属神奈川大学工学部電気電子情報工学科職種助手
言語種別	日本語
発行・発表の年月	2010/12
形態種別	学術雑誌
査読	査読あり
標題	Super-Resolution Decoding of JPEG-Compressed Image Data with the Shrinkage in the Redundant DCT Domain
執筆形態	共著
巻・号・頁	PCS2010, P1-24,pp. 114 -117頁
著者・共著者	Takashi Komatsu, Yasutaka Ueda, Takahiro Saito
概要	Alter, Durand and Froment introduced the total-variation (TV) minimization approach to the artifact-free JPEG decoding. They formulated the decoding problem as the constrained TV restoration problem, in which the TV semi-norm of its restored color image is minimized under the constraint that each DCT coefficient of the restored color image should be in the quantization interval of its corresponding DCT coefficient of the JPEG-compressed data. This paper proposes a new restoration approach to the JPEG decoding. Instead of the TV regularization, our new JPEG-decoding method employs a shrinkage operation in the redundant DCT domain, to mitigate degradations caused by the JPEG coding.