Convex projections restoration of Hadamard naturalness-preserving transform coded images

Author

Fore, Charlotte R. ; Yarlagadda, Rao K.

Author_Institution

Sch. of Electr. & Comput. Eng., Oklahoma State Univ., Stillwater, OK, USA

fYear

1998

fDate

5-7 Apr 1998

Firstpage

18

Lastpage

22

Abstract

This paper investigates an image coding system using the Hadamard naturalness-preserving transform (HNPT). It focuses both on the encoding and the decoding processes. Symmetric Lloyd-Max quantizers are designed to encode the HNPT coefficients. The theory of projections onto convex sets (POCS) is used as a basis for the design of an iterative reconstruction algorithm. A constraint set is defined that imposes consistency with known values. Experimental results to date demonstrate the convergence of the restoration algorithm

Keywords

Hadamard transforms; decoding; image coding; image restoration; iterative methods; quantisation (signal); transform coding; HNPT coefficients; Hadamard naturalness-preserving transform; POCS; coded images; constraint set; convex projections restoration; decoding; experimental results; iterative reconstruction algorithm; projections onto convex sets; symmetric Lloyd-Max quantizers; Algorithm design and analysis; Convergence; Encoding; Error correction; Error correction codes; Image coding; Image restoration; Iterative algorithms; Iterative decoding; Reconstruction algorithms;

fLanguage

English

Publisher

ieee

Conference_Titel

Image Analysis and Interpretation, 1998 IEEE Southwest Symposium on

Conference_Location

Tucson, AZ

Print_ISBN

0-7803-4876-1

Type

conf

DOI

10.1109/IAI.1998.666853

Filename

666853