digital image processing

May 13th, 2015
Studypool Tutor
Price: $10 USD

Tutor description

This paper presents an efficient image denoising scheme by using principal component analysis (PCA) with local pixel grouping (LPG). For a better preservation of image local structures, a pixel and its nearest neighbors are modeled as a vector variable, whose training samples are selected from the local window by using block matching based LPG.

Word Count: 7377
Showing Page: 1/51
digital image processingARTICLE IN PRESSPattern Recognition 43 (2010) 1531-1549Contents lists available at ScienceDirectPattern Recognitionjournal homepage: www.elsevier.de/locate/prTwo-stage image denoising by principal component analysis with local pixel groupingLei Zhang a,, Weisheng Dong a,b, David Zhang a, Guangming Shi b abDepartment of Computing, The Hong Kong Polytechnic University, Hong Kong, China Key Laboratory of Intelligent Perception and Image Understanding (Chinese Ministry of Education), School of Electronic Engineering, Xidian University, Chinaa r t i c l e in foabstractArticle history:Received 5 November 2008Received in revised form18 September 2009Accepted 22 September 2009This paper presents an efcient image denoising scheme by using principal component analysis (PCA) with local pixel grouping (LPG). For a better preservation of image local structures, a pixel and its nearest neighbors are modeled as a vector variable, whose training samples are selected from the local window by using block matching based LPG. Such an LPG procedure guarantees that only the sample blocks with similar contents are used in the local statistics calculation for PCA transform estimation, so that the image local features can be well preserved after coefcient shrinkage in the PCA domain to remove the noise. The LPG-PCA denoising procedure is iterated one more time to further improve the denoising performance, and the noise level is adaptively adjuste

Review from student

Studypool Student
" Outstanding Job!!!! "
Ask your homework questions. Receive quality answers!

Type your question here (or upload an image)

1820 tutors are online

Brown University





1271 Tutors

California Institute of Technology




2131 Tutors

Carnegie Mellon University




982 Tutors

Columbia University





1256 Tutors

Dartmouth University





2113 Tutors

Emory University





2279 Tutors

Harvard University





599 Tutors

Massachusetts Institute of Technology



2319 Tutors

New York University





1645 Tutors

Notre Dam University





1911 Tutors

Oklahoma University





2122 Tutors

Pennsylvania State University





932 Tutors

Princeton University





1211 Tutors

Stanford University





983 Tutors

University of California





1282 Tutors

Oxford University





123 Tutors

Yale University





2325 Tutors