DCT符号インデックスを用いた高精細画像の作成法

カテゴリ: 論文誌(論文単位)

グループ名: 【C】電子・情報・システム部門

発行日: 2013/03/01

タイトル(英語): Creation Method of High-Definition Image using DCT Sign Index

著者名: 江田　孝治（福岡大学）

著者名(英語): Takaharu Kouda (Fukuoka University)

キーワード: DCT，DCT符号インデックス，事例ベース超解像　　DCT，DCT sign index，Example-based Super-Resolution

要約(英語): The purpose of this study is to propose a new creation method of high-resolution images using DCT. Images enlarged with image interpolation method blur due to the lack of high-frequency components. Super-resolution method is important in improving the sense of resolution of such images. In the proposed method, high-frequency components of images enlarged with bi-linear interpolation are restored to refine the enlarged images. Restoring high-frequency components is implemented by each focused block on the enlarged image. Since the high-frequency components of the focused blocks are lacked, they are searched from a database by means of DCT sign index. Here, the database is learned from multiple nature description images in advance. In addition, the DCT sign index used for search is generated from signs of DCT coefficient of the low-frequency components of the focused blocks. The proposed method made fast search of the database possible with the use of the DCT sign index. From many simulation results, the proposed method is proved effective.

本誌: 電気学会論文誌C（電子・情報・システム部門誌） Vol.133 No.3 （2013） 特集Ⅰ：電磁波の技術と科学および信号処理　特集Ⅱ：電子・情報・システム分野の最先端技術

本誌掲載ページ: 680-687 p

原稿種別: 論文／日本語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejeiss/133/3/133_680/_article/-char/ja/