Palette-based image compression method, system and data file
First Claim
Patent Images
1. A method for compressing a selected, palette-based color image comprising:
- determining the pixel frequency of each color in the image'"'"'s palette;
sorting the palette colors into an ordered, unidirectionally increasing or decreasing, differentiated color-frequency sequence; and
on the basis of said determining and sorting, performing compression by treating boundaries between adjacent, differentiated color zones as boundaries dividing bi-level, binary-differentiated images, and by coding for these boundaries.
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Abstract
A system and method involving the compression of palette-based color images. Compression is based upon coding for boundaries that exist in the original uncompressed image, where such boundaries effectively define a character of binary color differentiation between next-adjacent color zones, which differentiation can be expressed as N and not N, where N is one of the colors in the color palette of the original image.
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Citations
7 Claims
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1. A method for compressing a selected, palette-based color image comprising:
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determining the pixel frequency of each color in the image'"'"'s palette; sorting the palette colors into an ordered, unidirectionally increasing or decreasing, differentiated color-frequency sequence; and on the basis of said determining and sorting, performing compression by treating boundaries between adjacent, differentiated color zones as boundaries dividing bi-level, binary-differentiated images, and by coding for these boundaries. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification