Method for efficient rate control
First Claim
1. An efficient method for determining the compressed rate of a digital image with a given set of compression parameters that affect the amount of quantization, comprising the steps of:
- a) forming a plurality of sparsely-sampled non-overlapping image regions, each of which includes a plurality of contiguous pixels, from the digital image where the total number of pixels contained in all of the regions is less than the total pixels in the digital image;
b) compressing each region with the given set of compression parameters, thereby generating a resulting rate for each region; and
, c) combining the resulting rate from each region to form an estimate of the compressed rate of the digital image.
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Abstract
An efficient method for determining the compressed rate of a digital image with a given set of compression parameters, the method comprises the steps of forming a plurality of non-overlapping image regions, each of which includes a plurality of contiguous pixels, from the digital image where the total number of pixels contained in all of the contiguous regions is less than the total pixels in the digital image; compressing each region with the given set of compression parameters; and, combining the resulting rate from each region to form an estimate of the compressed rate of the digital image.
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Citations
47 Claims
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1. An efficient method for determining the compressed rate of a digital image with a given set of compression parameters that affect the amount of quantization, comprising the steps of:
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a) forming a plurality of sparsely-sampled non-overlapping image regions, each of which includes a plurality of contiguous pixels, from the digital image where the total number of pixels contained in all of the regions is less than the total pixels in the digital image;
b) compressing each region with the given set of compression parameters, thereby generating a resulting rate for each region; and
,c) combining the resulting rate from each region to form an estimate of the compressed rate of the digital image. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39)
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40. An efficient method for determining the compressed rate of a digital image with a given set of compression parameters that affect the amount of quantization, comprising the steps of
a) forming a plurality of non-overlapping image regions, each of which includes a plurality of contiguous pixels, by sampling the digital image uniformly over a large scale and randomly over a smaller scale; -
b) compressing each region with the given set of compression parameters, thereby generating a resulting rate for each region; and
c) combining the resulting rate from each region to form an estimate of the compressed rate of the digital image. - View Dependent Claims (41, 42, 43)
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44. An efficient method for determining the compressed rate of a digital image given JPEG compression with a given quantization table, comprising the steps of:
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a) forming a plurality of non-overlapping image regions, each of which includes a plurality of contiguous pixels, by dividing a digital image into uniformly distributed contiguous non-overlapping tiles and then selecting an image region from within each tile, where the total number of pixels contained in a region is less than the total number of pixels in a tile containing that region;
b) compressing each region with the given quantization table; and
,c) combining the resulting rate from each region to form an estimate of the compressed rate of the digital image. - View Dependent Claims (45, 46, 47)
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Specification