Coder matched layer separation and interpolation for compression of compound documents
First Claim
Patent Images
1. A method of decomposing an image comprising the steps of:
- a) decomposing the image into a plurality of stripes;
b) decomposing each stripe into foreground and background image layers, and a mask layer; and
c) applying a smoothing filter to interpolate irrelevant pixel values in the foreground and background layers for wavelet encoding efficiency.
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Abstract
A method of preparing an image for efficient wavelet transform compression includes the steps of separating the image into foreground and background image layers, and a mask layer. A smoothing filter is applied to interpolate irrelevant pixel values in the foreground and background layers for coder efficiency. The irrelevant pixel values are interpolated as a function of relevant pixels and causal irrelevant pixels within the smoothing filter window.
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Citations
24 Claims
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1. A method of decomposing an image comprising the steps of:
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a) decomposing the image into a plurality of stripes;
b) decomposing each stripe into foreground and background image layers, and a mask layer; and
c) applying a smoothing filter to interpolate irrelevant pixel values in the foreground and background layers for wavelet encoding efficiency. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method of preparing an image for efficient wavelet transform compression, comprising the steps of:
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a) separating the image into foreground and background image layers, and a mask layer; and
b) applying a smoothing filter to interpolate irrelevant pixel values in the foreground and background layers for coder efficiency. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24)
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Specification