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Image high-speed compression method and system based on FPGA under JPEG-LS lossless compression standard

A JPEG-LS, lossless compression technology, applied in the field of image processing, can solve the problems of less context information, unfavorable JPEG-LS compression method, increased hardware resource overhead, etc., and achieve the effect of high processing speed and wide application range

Pending Publication Date: 2021-12-07
SHENYANG AEROSPACE UNIVERSITY
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Problems solved by technology

However, in scenes with high speed requirements, the image must be divided into more small blocks to meet the demand, which will not only increase the overhead of hardware resources, but also cause less context information if the sub-blocks are too small, which is not conducive to JPEG-LS based Context Compression

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  • Image high-speed compression method and system based on FPGA under JPEG-LS lossless compression standard
  • Image high-speed compression method and system based on FPGA under JPEG-LS lossless compression standard
  • Image high-speed compression method and system based on FPGA under JPEG-LS lossless compression standard

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[0071] The invention will be further described below in conjunction with the accompanying drawings and specific implementation examples. The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, to provide an FPGA design and implementation method of a high-speed lossless compression system for spaceborne images, and to adjust the calculation structure of parameter update on the basis of forward prediction, and to Under the premise of affecting the compression quality, a full pipeline structure is adopted. In the normal coding mode, the problem that the algorithm's own feedback structure restricts the implementation of the hardware pipeline and thus leads to low operating frequency is solved. Realize the deployment of high-speed JPEG_LS lossless image compression system on the FPGA (Field Programmable Gate Array) hardware platform. This structure can not only meet the purpose of processing image data at a high speed, but also...

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Abstract

The invention provides an image high-speed compression method and system based on an FPGA (Field Programmable Gate Array) under a JPEG-LS (Joint Photographic Experts Group-Least Squares) lossless compression standard, which adopts a forward prediction mode to calculate a prediction error correction value of each pixel, corrects an error value of the pixel through the prediction correction value, and updates a correction parameter according to the corrected error value, all the error values are coded in a Golomb-Rice coding mode, and lossless compression of the image is achieved; in a normal coding mode, the problem that the working frequency is low due to the fact that a feedback structure of the JPEG-LS restricts implementation of a hardware assembly line is solved, a high-speed JPEG_LS lossless image compression system is deployed on an FPGA hardware platform, the structure can not only meet the purpose of processing image data at a high speed, meanwhile, the parameterized design enables the system to dynamically adjust input image parameters, and parameter configuration can be carried out according to different application environments.

Description

technical field [0001] The invention belongs to the technical field of image processing, and in particular relates to an FPGA-based high-speed image compression method and system under the JPEG-LS lossless compression standard. Background technique [0002] With the development of sensor technology and the advancement of aerospace technology, the huge amount of data generated instantaneously by airborne and spaceborne remote sensing equipment has increasingly increased the requirements for the transmission bandwidth of real-time transmission systems. There are many loads on the satellite, the input source code data rate is high, and the fidelity of the image data is required to be high. In order to ensure the quality of the transmitted image, compressing the image data for transmission has become the most effective means to solve these problems. [0003] JPEG-LS is an algorithm used in the new ISO / ITU standard for lossless or near-lossless compression of static continuous to...

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Application Information

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IPC IPC(8): H04N19/182H04N19/42H04N19/124H04N19/50H04N19/85
CPCH04N19/182H04N19/42H04N19/124H04N19/50H04N19/85Y02D10/00
Inventor 张丽丽刘雨轩屈乐乐王尔申
Owner SHENYANG AEROSPACE UNIVERSITY
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