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Visual lossless image compression coding method and image compression method based on JPEG-LS standard

A JPEG-LS, lossless image technology, applied in the visual lossless image compression coding method and the field of image compression, can solve problems such as unsatisfactory compression effect, inability to achieve correlation, etc. Decoding consistent effects

Inactive Publication Date: 2020-03-27
SHANGHAI FULLHAN MICROELECTRONICS
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Problems solved by technology

It can be developed because the lossless JPEG compression based on Huffman coding or other compression algorithms have unsatisfactory compression effects and cannot achieve complete decorrelation at the beginning

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  • Visual lossless image compression coding method and image compression method based on JPEG-LS standard
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  • Visual lossless image compression coding method and image compression method based on JPEG-LS standard

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Embodiment Construction

[0034] In order to make the purpose and features of the present invention more comprehensible, the specific implementation manners of the present invention will be further described below in conjunction with the accompanying drawings. However, the present invention can be implemented in different forms and should not be limited to the described embodiments. Moreover, in the case of no conflict, the embodiments in the present application and the features in the embodiments are allowed to be combined or replaced with each other. The advantages and features of the present invention will become clearer in conjunction with the following descriptions.

[0035] It should be noted that all the drawings are in a very simplified form and use imprecise scales, and are only used to facilitate and clearly assist the purpose of illustrating the embodiments of the present invention.

[0036] It should also be stated that the purpose of numbering the steps in the present invention is to faci...

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Abstract

The invention relates to the technical field of digital image processing, and provides a visual lossless image compression coding method based on a JPEG-LS standard, and the method comprises the following steps: judging whether the quantity loss of a pixel point exceeds a preset range or not; if not, correcting the quantification parameter NEAR and then encoding the image according to the JPEG-LSstandard; and if so, encoding the image according to the JPEG-LS standard. The method has the advantage that the coding compression ratio of the image is improved by 10%-15%.

Description

technical field [0001] The invention relates to the technical field of digital image processing, in particular to a visually lossless image compression coding method and an image compression method based on the JPEG-LS standard. Background technique [0002] Lossless JPEG (lossless image compression) is a standard for image lossless compression added by the Joint Photographic Experts Group in 1993. This is also a general concept of image lossless compression proposed by the Joint Photographic Experts Group. kind of standard. [0003] At present, the internationally recognized lossless data compression standard with excellent performance is the JPEG-LS algorithm, which can directly control the restoration quality of the reconstructed image, but because the algorithm uses context-based predictive coding, its output bit rate is uncontrollable, that is, The output code stream of this algorithm has a large fluctuation, which limits its practical application in the application en...

Claims

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Application Information

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IPC IPC(8): H04N19/124H04N19/70H04N19/42H04N19/182H04N19/154
CPCH04N19/124H04N19/154H04N19/182H04N19/42H04N19/70
Inventor 章旭东田景军刘翔刘文庭朱媛媛
Owner SHANGHAI FULLHAN MICROELECTRONICS
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