PERCEPTUALLY LOSSLESS COLOR COMPRESSION
First Claim
1. A method of segmenting a mask layer of an image, comprising:
- forming gradient components;
using grayscale values of pixels adjacent to maximal gradient points within the gradient components to obtain respective threshold values for the gradient components;
for each of the gradient components, using a respective one of said threshold values to threshold all pixels within a bounding box of the respective gradient component to form a respective thresholded component; and
adding one or more of the thresholded components or an inverse of the one or more of the thresholded components to the mask layer.
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Accused Products
Abstract
A system and method of color data compression may perform variations of MRC compression including taking into consideration means and/or variances within k×k cells of an image, background texture, background smoothed color, and gradient components for determination of which parts of an image belong to the background and foreground MRC layers, for calculating thresholds values for such determinations, and determining correctness of determined thresholds and polarity, and may determine the background and foreground layer colors based on the variances, the gradient components, and neighboring pixels of non-color-assigned pixels of the background and foreground layers.
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Citations
14 Claims
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1. A method of segmenting a mask layer of an image, comprising:
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forming gradient components; using grayscale values of pixels adjacent to maximal gradient points within the gradient components to obtain respective threshold values for the gradient components; for each of the gradient components, using a respective one of said threshold values to threshold all pixels within a bounding box of the respective gradient component to form a respective thresholded component; and adding one or more of the thresholded components or an inverse of the one or more of the thresholded components to the mask layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification