Estimation of visual bandwidths and their impact in image decomposition and coding

Abdelhakim Saadane; Dominique Barba; Hakim Senane

doi:10.1117/12.157910

22 October 1993 Estimation of visual bandwidths and their impact in image decomposition and coding

Abdelhakim Saadane, Dominique Barba, Hakim Senane

Proceedings Volume 2094, Visual Communications and Image Processing '93; (1993) https://doi.org/10.1117/12.157910
Event: Visual Communications and Image Processing '93, 1993, Cambridge, MA, United States

Abstract

In order to characterize the spatial frequency mechanisms of the visual system, we measured the visibility threshold evaluation as a function of the spatial frequency cosine maskers. The stimulus and the maskers used were spatially localized and temporally weighted. The results show that the relative bandwidth (defined as the ratio between the estimated bandwidth and the frequency of the masker) varies from 3 in low frequencies of the masker (1 cy/d degree(s)) to 1.15 in high frequencies of the masker (10 cy/d degree(s)). This is consistent with a model having five classes of spatial frequency mechanisms covering the band 0 - 30 cy/d degree(s). These results allow the definition of a sub-band decomposition of images in twenty-one `visual components.'

Citation Download Citation

Abdelhakim Saadane, Dominique Barba, and Hakim Senane "Estimation of visual bandwidths and their impact in image decomposition and coding", Proc. SPIE 2094, Visual Communications and Image Processing '93, (22 October 1993); https://doi.org/10.1117/12.157910

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