Wavelet image coding exhibits a robust error resilience performance by utilizing the naturally layered bitstream construction over a band-limited channel. In this paper, a closed form of the visual entropy is defined based on a visual weight over the wavelet domain, which is characterized by the HVS (human vision system) over the frequency and spatial domains. This visual weight is then utilized as a criterion for determining the coding order of wavelet coefficients and the resulting improved visual quality is demonstrated. In terms of visual entropy, a transmission gain of up to 20 % can be obtained at a normalized channel throughput of about 0.3.
Visual data rate gain for wavelet foveated image coding
01.01.2005
456452 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
Visual Data Rate Gain for Wavelet Foveated Image Coding
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