Block-adaptive subband coding of images

Author

Diab, Chaouki ; Prost, Rémy ; Goutte, Robert

Author_Institution

Inst. Nat. des Sci. Appl. de Lyon, Villeurbanne, France

fYear

1990

fDate

3-6 Apr 1990

Firstpage

2093

Abstract

An error-free image decomposition/reconstruction method for subband coding is introduced. This method is used for blockwise subband coding. A partitioning algorithm is presented. The image is partitioned into blocks of identical size and then adjacent blocks of similar variances are merged. For each block, an adaptation of the subband number and bit allocation is made. The bit allocation algorithm uniformly distributes the quantization error into subbands and blocks. Examples clearly show that the peak-to-peak signal-to-noise ratio of the reconstructed images is better using the block-adaptive partitioning method than for subband coding of the entire image

Keywords

encoding; picture processing; bit allocation algorithm; block-adaptive partitioning method; blockwise subband coding; error free method; image decomposition; image reconstruction; peak-to-peak signal-to-noise ratio; picture processing; quantization error; Bit rate; Discrete Fourier transforms; Filtering; Filters; Frequency; Image coding; Image decomposition; Image reconstruction; Partitioning algorithms; Quantization; Reconstruction algorithms; Signal to noise ratio;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech, and Signal Processing, 1990. ICASSP-90., 1990 International Conference on

Conference_Location

Albuquerque, NM

ISSN

1520-6149

Type

conf

DOI

10.1109/ICASSP.1990.115944

Filename

115944