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- W2069839148 abstract "According to the collage theorem, the encoding distortion for fractal image compression is directly related to the metric used in the encoding process. In this paper, we introduce a perceptually meaningful distortion measure based on the human visual system's nonlinear response to luminance and the visual masking effects. Blackwell's psychophysical raw data on contrast threshold are first interpolated as a function of background luminance and visual angle, and are then used as an error upper bound for perceptually lossless image compression. For a variety of images, experimental results show that the algorithm produces a compression ratio of 8:1 to 10:1 without introducing visual artifacts." @default.
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- W2069839148 modified "2023-09-23" @default.
- W2069839148 title "<title>Perceptually lossless fractal image compression</title>" @default.
- W2069839148 doi "https://doi.org/10.1117/12.233214" @default.
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