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Alternative TitleResearch on Implementation of Real-time Image Compression Method for Rice Algorithm
Thesis Advisor罗海波
Keyword无损压缩 Rice算法 改进med预测 二维均值预测 星载图像 仿真验证平台 Fpga
Call NumberTP391.4/W47/2011
Degree Discipline模式识别与智能系统
Degree Name硕士
Degree Grantor中国科学院沈阳自动化研究所
Place of Conferral沈阳
Other AbstractOver the past two decades, how to use the Rice algorithm has been an important research topic for the lossless compression field for space borne images. It has been used on more than 25 satellites in the developed countries represented by the United States. Therefore, it has very important significance, wide application prospects and some academic values for how to improve and hardware implementation of the algorithm. The paper is composed of four sections. Firstly, it introduces the research and application in the field of current domestic and international space borne image compression then briefly describes the basic principles of image compression, focusing on statistical coding, predictive coding, error mapping and the still image compression standard JPEG and JPEG2000. Secondly, the main theoretical system of Rice algorithm is given, that is, based on adaptive entropy coding strategy. Thirdly, according to the recommendations of CCSDS Blue Book, this section discusses the practical application of the Rice algorithm trade-offs, combined with the characteristics of smoothness and uniformity of adjacent pixels for remote sensing images, then proposes a two-dimensional mean prediction (Mean prediction) and improved MED (ImMED). Then the principle and performance of two residual mappers, especially in compression rate and the error resilient performance are analyzed. Considering the impact of compression ratio for packet length, an improved Rice algorithm is proposed. At last, an FPGA-based technology method for real-time implementation for Rice algorithm is proposed and a simulation and verification platform based on Matlab, Quartus II and Models is built. Using FPGA as Implementation scheme, the system is highly integrated, flexible design, the user can reconfigure it at any time depending on the need.
Contribution Rank1
Document Type学位论文
Recommended Citation
GB/T 7714
魏永旺. Rice图像压缩算法及其实时实现方法研究[D]. 沈阳. 中国科学院沈阳自动化研究所,2011.
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