Memory management of compressed image data
First Claim
1. A method of recovering image memory capacity, in relation to an image which has been encoded according to a layer progressive mode into L layers, L being an integer value greater than unity, the L layers being stored in an image memory having a limited capacity, said method comprising the steps of:
- defining a Quality Reduction Factor;
identifying at least one of the L layers corresponding to the Quality Reduction Factor; and
discarding the at least one of the L layers in progressive order in accordance with the Quality Reduction Factor, thereby recovering the memory capacity.
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Accused Products
Abstract
A method is disclosed for recovering image memory capacity, in relation to an image which has been encoded using a linear transform according to a layer progressive mode into L layers, L being an integer value greater than unity, the L layers being stored in an image memory having a limited capacity. The method comprises defining a Quality Reduction Factor (700), being a positive integer value, identifying at least one of the L layers corresponding to the Quality Reduction Factor, and discarding (702) said at least one of the L layers in progressive order in accordance with the Quality Reduction Factor, thereby recovering said memory capacity.
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Citations
48 Claims
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1. A method of recovering image memory capacity, in relation to an image which has been encoded according to a layer progressive mode into L layers, L being an integer value greater than unity, the L layers being stored in an image memory having a limited capacity, said method comprising the steps of:
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defining a Quality Reduction Factor;
identifying at least one of the L layers corresponding to the Quality Reduction Factor; and
discarding the at least one of the L layers in progressive order in accordance with the Quality Reduction Factor, thereby recovering the memory capacity. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of recovering image memory capacity, in relation to an image which has been encoded according to a resolution progressive mode into R resolution levels, R being an integer value greater than unity, the R resolution levels being stored in an image memory having a limited capacity;
- the method comprising the steps of;
defining a Resolution Reduction Factor;
identifying at least one of the resolution levels, corresponding to the Resolution Reduction Factor; and
discarding the at least one of the resolution levels in progressive order, in accordance with the Resolution Reduction Factor, thereby recovering the memory capacity. - View Dependent Claims (9, 10, 11, 12, 13, 14)
- the method comprising the steps of;
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15. A method of recovering image memory capacity, in relation to an image which has been encoded to produce a plurality of corresponding encoded image elements arranged in a progressive order, the encoded image elements being stored in an image memory having a limited capacity, said method comprising the steps of:
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defining a reduction factor;
identifying at least one of the encoded image elements corresponding to the reduction factor; and
discarding the at least one encoded image element in the progressive order, thereby recovering the memory capacity. - View Dependent Claims (16)
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17. An apparatus for recovering image memory capacity, in relation to an image which has been encoded according to a layer progressive mode into L layers, L being an integer value greater than unity, the L layers being stored in an image memory having a limited capacity;
- said apparatus comprising;
Quality Reduction Defining means for defining a Quality Reduction Factor;
identifying means for identifying at least one of the L layers corresponding to the Quality Reduction Factor; and
discarding means for discarding the at least one of the L layers in the progressive order in accordance with the Quality Reduction Factor, thereby recovering the memory capacity. - View Dependent Claims (18, 19, 20, 21, 22, 23, 30)
- said apparatus comprising;
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24. An apparatus for recovering image memory capacity, in relation to an image which has been encoded according to a resolution progressive mode into R resolution levels, R being an integer value greater than unity, the R resolution levels being stored in an image memory having a limited capacity, the apparatus comprising:
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Resolution Reduction Factor defining means for defining a Resolution Reduction Factor;
identifying means for identifying at least one of the resolution levels, corresponding to the Resolution Reduction Factor; and
discarding means for discarding the at least one of the resolution levels in a progressive order, in accordance with the Resolution Reduction Factor, thereby recovering the memory capacity. - View Dependent Claims (25, 26, 27, 28, 29)
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31. An apparatus for recovering image memory capacity, in relation to an image which has been encoded to produce a plurality of corresponding encoded image elements arranged in a progressive order, the encoded image elements being stored in an image memory having a limited capacity, said apparatus comprising:
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defining means for defining a reduction factor;
identifying means for identifying at least one of the encoded image elements corresponding to the reduction factor; and
discarding means for discarding the at least one encoded image element in the progressive order, thereby recovering the memory capacity. - View Dependent Claims (32)
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33. A computer readable memory medium for storing a program for an apparatus for recovering image memory capacity, in relation to an image which has been encoded according to a layer progressive mode into L layers, L being an integer value greater than unity, the L layers being stored in an image memory having a limited capacity, said program comprising:
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code for a defining step, of defining a Quality Reduction Factor;
code for an identifying step, of identifying at least one of the L layers corresponding to the Quality Reduction Factor; and
code for a discarding step, of discarding the at least one of the L layers in progressive order in accordance with the Quality Reduction Factor, thereby recovering the memory capacity. - View Dependent Claims (34, 35, 36, 37, 38, 39, 46)
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40. A computer readable memory medium for storing a program for apparatus for recovering image memory capacity, in relation to an image which has been encoded according to a resolution progressive mode into R resolution levels, R being an integer value greater than unity, the R resolution levels being stored in an image memory having a limited capacity, the program comprising:
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code for a defining step, of defining a Resolution Reduction Factor;
code for an identifying step, of identifying at least one of the resolution levels, corresponding to the Resolution Reduction Factor; and
code for a discarding step, of discarding the at least one of the resolution levels in progressive order, in accordance with the Resolution Reduction Factor, thereby recovering the memory capacity. - View Dependent Claims (41, 42, 43, 44, 45)
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47. A computer readable memory medium for storing a program for an apparatus for recovering image memory capacity, in relation to an image which has been encoded to produce a plurality of corresponding encoded image elements arranged in a progressive order, said encoded image elements being stored in an image memory having a limited capacity, said program comprising:
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code for a defining step, of defining a reduction factor;
code for an identifying step, of identifying at least one of the encoded image elements corresponding to the reduction factor; and
code for a discarding step, of discarding the at least one encoded image element in the progressive order, thereby recovering the memory capacity. - View Dependent Claims (48)
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Specification