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US 8,948,530 B2Granted
Adaptive image compression system and method
AssigneesQuram Co., Ltd., Fingram Co., Ltd.
InventorsYoung Cheul Wee, Young Hoon Ahn, Sung Soo Park
Life of this patent
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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.
Claims13
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.
7 more elements
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 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.
4 more elements
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 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.
4 more elements
A non-transitory computer readable record medium which stores therein a program for carrying out 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.
7 more elements
An adaptive image compressing system comprising:
- 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.
3 more elements
An adaptive image compressing system comprising:
- 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.
3 more elements
An adaptive image compressing system comprising:
- 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.
3 more elements
A non-transitory computer readable record medium which stores therein a program for carrying out 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 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.
4 more elements
A non-transitory computer readable record medium which stores therein a program for carrying out 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 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.
4 more elements
Dependencies are inferred from the claim text.