Adaptive image compression system and method
First Claim
Patent Images
1. An adaptive image compression method comprising:
- determining, at an adaptive image compression system, characteristics of an image that is to be compressed;
determining, at the adaptive image compression system, a quantization scale factor based on the characteristics of the image that is to be compressed;
generating an adaptive quantization table corresponding to the image that is to be compressed based on the determined quantization scale factor; and
encoding the image that is to be compressed using the generated adaptive quantization table,wherein determining, at the adaptive image compression system, the characteristics of the image that is to be compressed comprises;
dividing a gray image corresponding to the image that is to be compressed into a plurality of blocks;
calculating a characteristic value of each of the divided blocks; and
determining the characteristics of the image that is to be compressed based on the calculated characteristic value of each of the divided blocks.
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Abstract
Provided are an adaptive image compression system and method. The adaptive image compression method includes a step of determining, at an adaptive image compression system, characteristics of an image that is to be compressed, a step of determining, at the adaptive image compression system, a quantization scale factor based on the characteristics of the image that is to be compressed, a step of generating an adaptive quantization table corresponding to the image that is to be compressed based on the determined quantization scale factor, and a step of encoding the image that is to be compressed using the generated adaptive quantization table.
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Citations
13 Claims
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1. An adaptive image compression method comprising:
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determining, at an adaptive image compression system, characteristics of an image that is to be compressed; determining, at the adaptive image compression system, a quantization scale factor based on the characteristics of the image that is to be compressed; generating an adaptive quantization table corresponding to the image that is to be compressed based on the determined quantization scale factor; and encoding the image that is to be compressed using the generated adaptive quantization table, wherein determining, at the adaptive image compression system, the characteristics of the image that is to be compressed comprises; dividing a gray image corresponding to the image that is to be compressed into a plurality of blocks; calculating a characteristic value of each of the divided blocks; and determining the characteristics of the image that is to be compressed based on the calculated characteristic value of each of the divided blocks. - View Dependent Claims (2, 3)
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4. An adaptive image compression method comprising:
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determining, at an adaptive image compression system, characteristics of an image that is to be compressed; determining, at the adaptive image compression system, a quantization scale factor based on the characteristics of the image that is to be compressed; generating an adaptive quantization table corresponding to the image that is to be compressed based on the determined quantization scale factor; and encoding the image that is to be compressed using the generated adaptive quantization table, wherein determining, at the adaptive image compression system, the quantization scale factor based on the characteristics of the image that is to be compressed comprises determining, at the adaptive image compression system, a quantization scale factor value corresponding to the image that is to be compressed based on a quantization scale factor determination list that includes information about a corresponding quantization scale factor value according to the determined characteristics of the image that is to be compressed.
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5. An adaptive image compression method comprising:
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determining, at an adaptive image compression system, characteristics of an image that is to be compressed; determining, at the adaptive image compression system, a quantization scale factor based on the characteristics of the image that is to be compressed; generating an adaptive quantization table corresponding to the image that is to be compressed based on the determined quantization scale factor; and encoding the image that is to be compressed using the generated adaptive quantization table, wherein generating the adaptive quantization table corresponding to the image that is to be compressed based on the determined quantization scale factor comprises; generating, at the adaptive image compression system, a gray adaptive quantization table and a color adaptive quantization table based on the determined quantization scale factor and a reference quantization table.
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6. A non-transitory computer readable record medium which stores therein a program for carrying out an adaptive image compression method comprising:
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determining, at an adaptive image compression system, characteristics of an image that is to be compressed; determining, at the adaptive image compression system, a quantization scale factor based on the characteristics of the image that is to be compressed; generating an adaptive quantization table corresponding to the image that is to be compressed based on the determined quantization scale factor; and encoding the image that is to be compressed using the generated adaptive quantization table, wherein determining, at the adaptive image compression system, the characteristics of the image that is to be compressed comprises; dividing a gray image corresponding to the image that is to be compressed into a plurality of blocks; calculating a characteristic value of each of the divided blocks; and determining the characteristics of the image that is to be compressed based on the calculated characteristic value of each of the divided blocks.
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7. An adaptive image compressing system comprising:
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a characteristic determination module which determines characteristics of an image that is to be compressed; a quantization scale factor determination module which determines a quantization scale factor based on the determined characteristics of the image that is to be compressed; an adaptive quantization table generation module which generates an adaptive quantization table corresponding to the image that is to be compressed based on the determined quantization scale factor; and an encoder which encodes the image that is to be compressed using the generated adaptive quantization table, wherein the characteristic determination module divides a gray image corresponding to the image that is to be compressed into a plurality of blocks, calculates a characteristic value of each of the divided blocks, and determines the characteristics of the image that is to be compressed based on the calculated characteristic value of each of the divided blocks. - View Dependent Claims (8, 9)
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10. An adaptive image compressing system comprising:
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a characteristic determination module which determines characteristics of an image that is to be compressed; a quantization scale factor determination module which determines a quantization scale factor based on the determined characteristics of the image that is to be compressed; an adaptive quantization table generation module which generates an adaptive quantization table corresponding to the image that is to be compressed based on the determined quantization scale factor; and an encoder which encodes the image that is to be compressed using the generated adaptive quantization table, wherein the quantization scale factor determination module determines a quantization scale factor value corresponding to the image that is to be compressed based on a quantization scale factor determination list that includes information about a corresponding quantization scale factor value according to the determined characteristics of the image that is to be compressed.
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11. An adaptive image compressing system comprising:
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a characteristic determination module which determines characteristics of an image that is to be compressed; a quantization scale factor determination module which determines a quantization scale factor based on the determined characteristics of the image that is to be compressed; an adaptive quantization table generation module which generates an adaptive quantization table corresponding to the image that is to be compressed based on the determined quantization scale factor; and an encoder which encodes the image that is to be compressed using the generated adaptive quantization table, wherein the adaptive quantization table generation module generates a gray adaptive quantization table and a color adaptive quantization table based on the determined quantization scale factor and a reference quantization table.
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12. A non-transitory computer readable record medium which stores therein a program for carrying out an adaptive image compression method comprising:
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determining, at an adaptive image compression system, characteristics of an image that is to be compressed; determining, at the adaptive image compression system, a quantization scale factor based on the characteristics of the image that is to be compressed; generating an adaptive quantization table corresponding to the image that is to be compressed based on the determined quantization scale factor; and encoding the image that is to be compressed using the generated adaptive quantization table, wherein determining, at the adaptive image compression system, the quantization scale factor based on the characteristics of the image that is to be compressed comprises, determining, at the adaptive image compression system, a quantization scale factor value corresponding to the image that is to be compressed based on a quantization scale factor determination list that includes information about a corresponding quantization scale factor value according to the determined characteristics of the image that is to be compressed.
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13. A non-transitory computer readable record medium which stores therein a program for carrying out an adaptive image compression method comprising:
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determining, at an adaptive image compression system, characteristics of an image that is to be compressed; determining, at the adaptive image compression system, a quantization scale factor based on the characteristics of the image that is to be compressed; generating an adaptive quantization table corresponding to the image that is to be compressed based on the determined quantization scale factor; and encoding the image that is to be compressed using the generated adaptive quantization table, wherein generating the adaptive quantization table corresponding to the image that is to be compressed based on the determined quantization scale factor comprises; generating, at the adaptive image compression system, a gray adaptive quantization table and a color adaptive quantization table based on the determined quantization scale factor and a reference quantization table.
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Specification