【英文摘要】 With unceasing progress of information technology, image coding technology also obtained the rapid development. Specially, image compression coding already got the widespread application in astronautics in the past decades. Because the image can supply richer and direct-viewing information, it is already used as an important remote-sensing parameter to be used in the process of developing missile and rocket. Image coding technology based on aviation almost is applied on special satellite, so the research of image collection and coding technology aimed at missile/rocket has an important meaning.This research’s job is to select an algorithm to satisfy missile/rocket test system and realize it based on hardware platform. According to image coding characters of aerospace test, this paper’s algorithms are fixed in two still image compression standard: JPEG and JPEG2000. By contrast of two algorithms’performance, ultimately our paper chooses JPEG2000 as our priority research object; and also we improve and optimize to the block coding part whose algorithm complexity is highest; at last it suggests a image coding algorithm which is fit to an embedded operating system, and it realizes algorithm’s system transplantation which is based on DM642 hardware platform.
【中文关键词】 图像压缩; 箭载; JPEG2000; DM642
【英文关键词】 image compression; roket-borne; JPEG2000; DM642
【毕业论文目录】
摘要 4-5
Abstract 5
第1章 绪论 8-17
1.1 本课题的背景及研究意义 8-9
1.2 本课题的研究工作 9-10
1.3 国内外研究现状与发展趋势 10-16
1.3.1 图像编码技术在航天遥测中的应用 11-13
1.3.2 基本的图像编码技术 13-15
1.3.3 DSP 的发展及简介 15-16
1.4 论文的组织结构 16-17
第2章 算法的选择 17-30
2.1 图像压缩理论依据 17-18
2.2 算法的性能评价 18-20
2.2.1 图像压缩比 18
2.2.2 图像重构质量 18-20
2.3 图像压缩过程 20-21
2.4 算法的性能对比 21-27
2.4.1 JPEG 标准性能 21-23
2.4.2 JPEG2000 标准性能 23-25
2.4.3 JPEG 和JPEG2000 的比较 25-27
2.5 基于箭载图像编码的算法选择 27-29
2.6 本章小结 29-30
第3章 算法的改进性研究 30-41
3.1 编码模块性能分析 30-36
3.1.1 显著性扫描编码过程 33
3.1.2 幅度编码过程 33-34
3.1.3 清除编码过程 34-36
3.2 块编码算法改进 36-37
3.2.1 低位平面清除通道编码省略法 36
3.2.2 高位平面一次扫描法 36-37
3.3 实验结果分析 37-40
3.4 本章小结 40-41
第4章 算法的移植与优化 41-57
4.1 硬件开发平台 41-47
4.1.1 TMS320DM642 内核及外设 42-46
4.1.2 CCS 运行环境的建立 46-47
4.2 OPENJPEG 开源码结构 47-50
4.3 技术问题及解决方案 50-56
4.3.1 合理使用 CCS 的编译优化选项 50-52
4.3.2 优化C 语言程序 52-54
4.3.3 针对C6000 结构的优化 54-56
4.4 本章小结 56-57
第5章 实验结果分析 57-59
5.1 图像质量 57-58
5.2 运行效率 58
5.3 本章小结 58-59
第6章 总结 59-60
参考文献 60-63
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