• Complex
  • Title
  • Keyword
  • Abstract
  • Scholars
  • Journal
  • ISSN
  • Conference
搜索

Author:

Zhang, Zhen (Zhang, Zhen.) | Shi, Yunhui (Shi, Yunhui.) (Scholars:施云惠) | Ding, Wenpeng (Ding, Wenpeng.) | Yin, Baocai (Yin, Baocai.) (Scholars:尹宝才)

Indexed by:

EI Scopus SCIE

Abstract:

Compressive sensing (CS) theory, which has been widely used in magnetic resonance (MR) image processing, indicates that a sparse signal can be reconstructed by the optimization programming process from non-adaptive linear projections. Since MR Images commonly possess a blocky structure and have sparse representations under certain wavelet bases, total variation (TV) and wavelet domain norm regularization are enforced together (TV-wavelet Ll method) to improve the recovery accuracy. However, the components of wavelet coefficients are different: low-frequency components of an image, that carry the main energy of the MR image, perform a decisive impact for reconstruction quality. In this paper, we propose a TV and wavelet L2-L1 model (TVWL2-L1) to measure the low frequency wavelet coefficients with 2 norm and high frequency wavelet coefficients with l(1) norm. We present two methods to approach this problem by operator splitting algorithm and proximal gradient algorithm. Experimental results demonstrate that our method can obviously improve the quality of MR image recovery comparing with the original TV-wavelet method. (C) 2012 Elsevier Inc. All rights reserved.

Keyword:

Convex optimization MR image reconstruction Compressive sensing Wavelet transform Total variation

Author Community:

  • [ 1 ] [Zhang, Zhen]Beijing Univ Technol, Beijing Municipal Key Lab Multimedia & Intelligen, Coll Comp Sci & Technol, Beijing 100124, Peoples R China
  • [ 2 ] [Shi, Yunhui]Beijing Univ Technol, Beijing Municipal Key Lab Multimedia & Intelligen, Coll Comp Sci & Technol, Beijing 100124, Peoples R China
  • [ 3 ] [Ding, Wenpeng]Beijing Univ Technol, Beijing Municipal Key Lab Multimedia & Intelligen, Coll Comp Sci & Technol, Beijing 100124, Peoples R China
  • [ 4 ] [Yin, Baocai]Beijing Univ Technol, Beijing Municipal Key Lab Multimedia & Intelligen, Coll Comp Sci & Technol, Beijing 100124, Peoples R China

Reprint Author's Address:

  • 施云惠

    [Shi, Yunhui]Beijing Univ Technol, Beijing Municipal Key Lab Multimedia & Intelligen, Coll Comp Sci & Technol, Beijing 100124, Peoples R China

Show more details

Related Keywords:

Related Article:

Source :

JOURNAL OF VISUAL COMMUNICATION AND IMAGE REPRESENTATION

ISSN: 1047-3203

Year: 2013

Issue: 2

Volume: 24

Page: 187-195

2 . 6 0 0

JCR@2022

ESI Discipline: COMPUTER SCIENCE;

JCR Journal Grade:2

CAS Journal Grade:3

Cited Count:

WoS CC Cited Count: 7

SCOPUS Cited Count: 9

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 0

Online/Total:1987/10954898
Address:BJUT Library(100 Pingleyuan,Chaoyang District,Beijing 100124, China Post Code:100124) Contact Us:010-67392185
Copyright:BJUT Library Technical Support:Beijing Aegean Software Co., Ltd.