講演名 | 2012-05-17 Sparse Dictionary Representation and Propagation for MRI Volume Super-Resolution , |
---|---|
PDFダウンロードページ | PDFダウンロードページへ |
抄録(和) | |
抄録(英) | This study addresses the problem of generating a high-resolution (HR) MRI volume from a single low-resolution (LR) MRI input volume. Recent researches have proved that sparse coding can be successfully applied for single-frame super-resolution for natural images, which is based on good reconstruction of any local image patch with a sparse linear combination of atoms taken from an appropriate over-complete dictionary. This study adapts the basic idea of sparse code-based super-resolution (SCSR) for MRI volume data, and then improves the dictionary learning strategy in the conventional SCSR for achieving the precise sparse representation of HR volume patches. In the proposed MRI super-resolution strategy, we only learn the dictionary of the HR MRI volume patches with sparse coding algorithm, and then propagate the HR dictionary to the LR dictionary by mathematical analysis for calculating the sparse representation (coefficients) of any LR local input volume patch. The unknown corresponding HR volume patch can be reconstructed with the sparse coefficients from the LR volume patch and the corresponding HR dictionary. We validate that the proposed SCSR strategy through dictionary propagation can recover much clearer and more accurate HR MRI volume than the conventional interpolated methods. |
キーワード(和) | |
キーワード(英) | Spare representation / dictionary propagation / MRI volume / Super resolution |
資料番号 | IE2012-18,PRMU2012-3,MI2012-3 |
発行日 |
研究会情報 | |
研究会 | PRMU |
---|---|
開催期間 | 2012/5/10(から1日開催) |
開催地(和) | |
開催地(英) | |
テーマ(和) | |
テーマ(英) | |
委員長氏名(和) | |
委員長氏名(英) | |
副委員長氏名(和) | |
副委員長氏名(英) | |
幹事氏名(和) | |
幹事氏名(英) | |
幹事補佐氏名(和) | |
幹事補佐氏名(英) |
講演論文情報詳細 | |
申込み研究会 | Pattern Recognition and Media Understanding (PRMU) |
---|---|
本文の言語 | ENG |
タイトル(和) | |
サブタイトル(和) | |
タイトル(英) | Sparse Dictionary Representation and Propagation for MRI Volume Super-Resolution |
サブタイトル(和) | |
キーワード(1)(和/英) | / Spare representation |
第 1 著者 氏名(和/英) | / Xian-Hua Han |
第 1 著者 所属(和/英) | Ritsumeikan University |
発表年月日 | 2012-05-17 |
資料番号 | IE2012-18,PRMU2012-3,MI2012-3 |
巻番号(vol) | vol.112 |
号番号(no) | 37 |
ページ範囲 | pp.- |
ページ数 | 6 |
発行日 |