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Remote-sensing image decompression method based on GPU (Graphics Processing Unit)

An image compression and remote sensing image technology, applied in the field of image processing, can solve the problems of low parallel processing data, difficult to meet the real-time decompression of a large amount of remote sensing data, etc., to achieve the effect of hiding delay, increasing speed, and improving processing speed

Active Publication Date: 2011-08-17
SPACE STAR TECH CO LTD
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Problems solved by technology

Traditional decoding methods use CPU for single-thread or simple multi-thread processing, and low-level parallel processing of data. In the existing hardware environment, it is difficult to use traditional CPU-based algorithms to realize real-time decoding of a large amount of remote sensing data. compressed demand

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  • Remote-sensing image decompression method based on GPU (Graphics Processing Unit)
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  • Remote-sensing image decompression method based on GPU (Graphics Processing Unit)

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Embodiment Construction

[0025] Based on the implementation of the traditional JPEG2000 algorithm, a GPU-based remote sensing image decompression method is provided.

[0026] The specific design process includes: GPU+CPU heterogeneous decompression design; algorithm parallel processing design based on CUDA (Compute Unified Device Architecture, unified computing device architecture); parallel pipeline processing design of image decompression program.

[0027] 1. GPU+CPU heterogeneous decompression design

[0028] Considering the versatility and scalability of the codec module specified in the JPEG2000 standard, the integrity of its algorithm is preserved during optimization, and the requirements of the main part of PART1 in the JPEG2000 standard are adopted, and the decoding process in the decompression process of JPEG2000 is realized by CPU , using GPU to implement parallel processing in JPEG2000 decompression processing, thus forming a heterogeneous mode of GPU+CPU co-processing, such a design scheme...

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Abstract

The invention discloses a remote-sensing image decompression method based on a GPU (Graphics Processing Unit). A JPEG2000 image is subjected to the heterogeneous decompression processing by adopting a CPU (Central Processing Unit) and the GPU; the CPU is used for carrying out code stream compression on the image; and the GPU is used for carrying out decompression processing on decoded date. The remote-sensing image decompression method fully performs the efficacies of the CPU and the GPU, so that the image decompression processing speed is improved by 2-3 times.

Description

technical field [0001] The present invention relates to a remote sensing image decompression method based on GPU, which is mainly used for high-speed decoding operation on code streams compressed using JPEG2000 standard, and improves the speed of existing JPEG2000 image decoding algorithm based on CPU, which belongs to image processing technology field. Background technique [0002] With the continuous development of aerospace remote sensing technology at home and abroad, and the continuous improvement of remote sensing image resolution, it is necessary to study the decompression method of high-speed satellite remote sensing images to meet the continuously increasing data receiving code rate requirements. [0003] JPEG2000 is an international standard for still image compression coding officially promulgated by the JPEG working group in 2000. It has excellent image compression performance and high flexibility, and is considered to have broad application prospects in various ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/26H04N7/30H04N19/44H04N19/63H04N19/70
Inventor 高越张拯宁余瑾卢睿战勇杰朱翔宇姜河
Owner SPACE STAR TECH CO LTD
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