東華大學圖書館 |

語系: 繁體中文

說明(常見問題)

回圖書館首頁

手機版館藏查詢

登入

回首頁

切換: 標籤 | MARC模式 | ISBD

Image models for wavelet domain stat...

Azimifar, Seyedeh-Zohreh.

FindBook

Google Book

Amazon

博客來

Image models for wavelet domain statistics.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Image models for wavelet domain statistics./
作者:	Azimifar, Seyedeh-Zohreh.
面頁冊數:	205 p.
附註:	Source: Dissertation Abstracts International, Volume: 66-04, Section: B, page: 2284.
Contained By:	Dissertation Abstracts International66-04B.
標題:	Engineering, System Science. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=NR01248
ISBN:	049401248X

Image models for wavelet domain statistics.
Azimifar, Seyedeh-Zohreh.

Image models for wavelet domain statistics. - 205 p.

Source: Dissertation Abstracts International, Volume: 66-04, Section: B, page: 2284.

Thesis (Ph.D.)--University of Waterloo (Canada), 2005.

Statistical models for the joint statistics of image pixels are of central importance in many image processing applications. However the high dimensionality stemming from large problem size and the long-range spatial interactions make statistical image modeling particularly challenging. Commonly this modeling is simplified by a change of basis, mostly using a wavelet transform. Indeed, the wavelet transform has widely been used as an approximate whitener of statistical time series. It has, however, long been recognized that the wavelet coefficients are neither Gaussian, in terms of the marginal statistics, nor white, in terms of the joint statistics.

ISBN: 049401248XSubjects--Topical Terms:

1018128
Engineering, System Science.

Image models for wavelet domain statistics.
LDR:02957nmm 2200289 4500 001 1813458
005 20060503131725.5
008 130610s2005 eng d
020 $a 049401248X
035 $a (UnM)AAINR01248
035 $a AAINR01248
040 $a UnM $c UnM
100 1 $a Azimifar, Seyedeh-Zohreh. $3 1902962
245 1 0 $a Image models for wavelet domain statistics.
300 $a 205 p.
500 $a Source: Dissertation Abstracts International, Volume: 66-04, Section: B, page: 2284.
502 $a Thesis (Ph.D.)--University of Waterloo (Canada), 2005.
520 $a Statistical models for the joint statistics of image pixels are of central importance in many image processing applications. However the high dimensionality stemming from large problem size and the long-range spatial interactions make statistical image modeling particularly challenging. Commonly this modeling is simplified by a change of basis, mostly using a wavelet transform. Indeed, the wavelet transform has widely been used as an approximate whitener of statistical time series. It has, however, long been recognized that the wavelet coefficients are neither Gaussian, in terms of the marginal statistics, nor white, in terms of the joint statistics.
520 $a The question of wavelet joint models is complicated and admits for possibilities, with statistical structures within subbands, across orientations, and scales. Although a variety of joint models have been proposed and tested, few models appear to be directly based on empirical studies of wavelet coefficient cross-statistics. Rather; they are based on intuitive or heuristic notions of wavelet neighborhood structures. Without an examination of the underlying statistics, such heuristic approaches necessarily leave unanswered questions of neighborhood sufficiency and necessity.
520 $a This thesis presents an empirical study of joint wavelet statistics for textures and other imagery including dependencies across scale, space, and orientation. There is a growing realization that modeling wavelet coefficients as independent, or at best correlated only across scales, may be a poor assumption. While recent developments in wavelet-domain Hidden Markov Models (notably HMT-3S) account for within-scale dependencies, we find that wavelet spatial statistics are strongly orientation dependent, structures which are surprisingly not considered by state-of-the-art wavelet modeling techniques.
520 $a To demonstrate the effectiveness of the studied wavelet correlation models a novel non-linear correlated empirical Bayesian shrinkage algorithm based on the wavelet joint statistics is proposed. In comparison with popular nonlinear shrinkage algorithms; it improves the denoising results.
590 $a School code: 1141.
650 4 $a Engineering, System Science. $3 1018128
650 4 $a Computer Science. $3 626642
690 $a 0790
690 $a 0984
710 2 0 $a University of Waterloo (Canada). $3 1017669
773 0 $t Dissertation Abstracts International $g 66-04B.
790 $a 1141
791 $a Ph.D.
792 $a 2005
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=NR01248