DocumentCode
275644
Title
Scene adaptive vector quantization
Author
Du, Yonggang
Author_Institution
Aachen Univ. of Technol., West Germany
fYear
1989
fDate
18-20 Jul 1989
Firstpage
571
Lastpage
575
Abstract
A scene adaptive VQ-scheme for 8×8 blocks is proposed. The dimension is reduced by thresholding DCT-transformed block components. A classification in activity and energy concentration as well as an edge detector is used for setting the threshold value. Supra-threshold DCT-coefficients are quantized by several vector quantizers using gain/shape-separation and a multistage technique. Both the frequency response and the masking effect of the human visual system are utilized by the VQ
Keywords
data compression; encoding; picture processing; 8*8 blocks; activity; classification; dimension; discrete cosine transform; edge detector; energy concentration; frequency response; gain/shape-separation; human visual system; image coding; masking effect; multistage technique; scene adaptive VQ-scheme; supra-threshold DCT-coefficients; threshold value; thresholding DCT-transformed block components; vector quantization;
fLanguage
English
Publisher
iet
Conference_Titel
Image Processing and its Applications, 1989., Third International Conference on
Conference_Location
Warwick
Type
conf
Filename
132193
Link To Document