Title :
On the coding performances of DCT based subband decomposition for low contrast images
Author :
Benoit-Cattin, H. ; Prost, R. ; Baskurt, A.
Author_Institution :
CREATIS, Inst. Nat. des Sci. Appliquees, Villeurbanne, France
Abstract :
In this study, we consider the DCT based subband decomposition and show the efficiency of this approach for low contrast images in comparison to 9-7 bi-orthogonal FIR filters generally used in such a scheme. First, we consider the theoretical coding gain for the two approaches. Afterwards, the distortion versus rate performances are analyzed and the perceptual qualities of the reconstructed images are discussed. Finally, an edge detection operator is applied on the reconstructed images in order to show the robustness of DCT based subband decomposition to post-processing
Keywords :
FIR filters; discrete cosine transforms; edge detection; image coding; image reconstruction; rate distortion theory; transform coding; DCT based subband decomposition; bi-orthogonal FIR filters; coding performance; edge detection operator; efficiency; low contrast images; post-processing; rate-distortion performance; reconstructed images; robustness; theoretical coding gain; Discrete cosine transforms; Finite impulse response filter; Frequency; Image analysis; Image coding; Image edge detection; Image reconstruction; Performance analysis; Rate distortion theory; Robustness;
Conference_Titel :
Image Processing, 1997. Proceedings., International Conference on
Conference_Location :
Santa Barbara, CA
Print_ISBN :
0-8186-8183-7
DOI :
10.1109/ICIP.1997.638847
