Edge-based subband image coding technique for encoding the upper-frequency bands

Nader Mohsenian; Nasser M. Nasrabadi

doi:10.1117/12.50271

1 November 1991 Edge-based subband image coding technique for encoding the upper-frequency bands

Nader Mohsenian, Nasser M. Nasrabadi

Proceedings Volume 1605, Visual Communications and Image Processing '91: Visual Communication; (1991) https://doi.org/10.1117/12.50271
Event: Visual Communications, '91, 1991, Boston, MA, United States

Abstract

A subband coding (SBC) scheme, exploiting the dependencies that exist across the bands, is developed which can effectively compress the upper frequency bands of the decomposed image. An edge-detecting filter is incorporated into the SBC model that extracts the edge-pixels in the base-band, and identifies the locations of their counterparts in the upper-bands accordingly without transmission of any overhead information. A memoryless vector quantizing (VQ) scheme was used to encode the base-band: Once the edge-detected reconstructed base-band became available, another VQ coding scheme was employed to encode the upper frequency components across the bands in conjunction with the error derived due to the decoded base-band, only at edge locations. High quality 512 x 512 images were reconstructed at ~ 0.7 bits/pixel.

Citation Download Citation

Nader Mohsenian and Nasser M. Nasrabadi "Edge-based subband image coding technique for encoding the upper-frequency bands", Proc. SPIE 1605, Visual Communications and Image Processing '91: Visual Communication, (1 November 1991); https://doi.org/10.1117/12.50271

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