TY  - JOUR
EP  - 9016
PB  - OSA - The Optical Society
SN  - 1559128X
N1  - cited By 13
SP  - 9006
TI  - Tchebichef moment based restoration of Gaussian blurred images
AV  - none
JF  - Applied Optics
A1  - Kumar, A.
A1  - Paramesran, R.
A1  - Lim, C.-L.
A1  - Dass, S.C.
UR  - https://www.scopus.com/inward/record.uri?eid=2-s2.0-84995503348&doi=10.1364%2fAO.55.009006&partnerID=40&md5=3e9dd3a58e59e17482c3e80e80ccdeb5
VL  - 55
Y1  - 2016///
N2  - With the knowledge of how edges vary in the presence of a Gaussian blur, a method that uses low-order Tchebichef moments is proposed to estimate the blur parameters: sigma (Ï?) and size (w). The difference between the Tchebichef moments of the original and the reblurred images is used as feature vectors to train an extreme learning machine for estimating the blur parameters (Ï?,w). The effectiveness of the proposed method to estimate the blur parameters is examined using cross-database validation. The estimated blur parameters from the proposed method are used in the split Bregman-based image restoration algorithm. A comparative analysis of the proposed method with three existing methods using all the images from the LIVE database is carried out. The results show that the proposed method in most of the cases performs better than the three existing methods in terms of the visual quality evaluated using the structural similarity index. © 2016 Optical Society of America.
IS  - 32
ID  - scholars6687
KW  - Image reconstruction; Learning systems; Quality control; Restoration
KW  -  Blur parameter; Comparative analysis; Extreme learning machine; Feature vectors; Image restoration algorithms; Structural similarity indices; Tchebichef moments; Visual qualities
KW  -  Parameter estimation
ER  -