Reference TypeConference Proceedings
Citation KeyRilaAlca:1992:CoImSu
Author1 Rila, Luciano
2 Alcaim, Abraham
Affiliation1 IBM Brasil – Centro Científico Rio
2 IBM Brasil – Centro Científico Rio
TitleCodificação de imagens em sub-bandas com quantização vetorial inter-bandas particionada
Conference NameSimpósio Brasileiro de Computação Gráfica e Processamento de Imagens, 5 (SIBGRAPI)
EditorCâmara, Gilberto
Gomes, Jonas de Miranda
Book TitleAnais
Date10 - 12 nov. 1992
Publisher CityPorto Alegre
PublisherSociedade Brasileira de Computação
Conference LocationÁguas de Lindóia
Keywordscodificação de imagens, sub-bandas, quantização vetorial, inter-bandas, processamento de imagem.
AbstractSubband coding has proven to be an efficient method for coding images at low bit rates. In this paper we consider an algorithm to compress still images which is based on subband coding and inter-band vector quantization. The image spectrum is decomposed into 16 uniform bands using 2-D separable quadrature mirror filters. These 16 bands are used to create 16-dimensional vectors, which are coded using vector quantization. Our aprouch is to split these vectors in order to reduce complexity and exploit spectral properties of the image data. We examine the effects of the bit allocation at rates of 0.50 bit/pixel and 0.63 bit/pixel. Simulation results show that the performance is comparable to the basic coding structure, while complexity is significantly reduced.
TypeProcessamento de Imagens
Tertiary TypeArtigo
FormatImpresso, On-line.
Size5634 KiB
Number of Files1
Target File5 Codificacao de imagens em sub_bandas com quantizacao vetorial inter_bandas particionada.pdf
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