| 基于整型可逆时域交叠变换的遥感图像压缩 |
| |
| 引用本文： | 王磊,吴家骥,白静.基于整型可逆时域交叠变换的遥感图像压缩[J].光子学报,2014,39(12):2251-2256. |
| |
| 作者姓名： | 王磊 吴家骥 白静 |
| |
| 作者单位： | （西安电子科技大学 电子工程学院 智能感知与图像理解教育部重点实验室,智能信息处理研究所,西安 710071） |
| |
| 基金项目： | 国家自然科学基金（60607010、60201029）和教育部长江学者和创新团队支持计划（IRT0645）资助 |
| |
| 摘 要： | 提出了一种无乘法整型可逆时域交叠变换方法,并以此为核心变换技术设计了一种新的有损到无损渐进的图像压缩系统.利用所提出的压缩系统从一个单一的码流文件中既可以恢复出完全无损的图像,也可以在高压缩比下得到高质量的有损重构图像.算法通过前后向滤波器改进离散余弦变换性能,并在矩阵分解基础上通过多阶提升实现完全可逆整型变换.光学遥感图像的实验结果显示,该算法在绝大多数情况下可以达到优于图像压缩国际标准JPEG、JPEG2000以及新一代压缩算法HD-Photo的率失真性能以及高质量的主观视觉效果.
|
| 关 键 词： | 离散余弦变换 时域交叠变换 图像压缩 矩阵分解 整型可逆变换 |
| 收稿时间： | 2010-01-18 |
Remote Sensing Image Compression Based on Reversible Integer Time Domain Lapped Transform |
| |
| WANG Lei,WU Jia-ji,BAI Jing.Remote Sensing Image Compression Based on Reversible Integer Time Domain Lapped Transform[J].Acta Photonica Sinica,2014,39(12):2251-2256. |
| |
| Authors: | WANG Lei WU Jia-ji BAI Jing |
| |
| Institution: | (Key Laboratory of Intelligent Perception and Image Understanding (Ministry of Education)|Institute of Intelligent
Information Processing,School of Electronic Engineering,Xidian University,Xi′an 710071,China) |
| |
| Abstract: | A reversible non-multiplying integer time domain lapped transform was introduced,and a new progressive lossy-to-lossless compression system was designed based on this transform technique.Completely lossless compression images and high-quality lossy reconstructed images could be obtained from a single code-stream using the proposed compression system.RTDLT improved the transform efficiency of DCT by adding pre-and-post-filters,and it couldrealize reversible integer transform by multi-lifting based on matrix factorization.Simulation results show that RTDLT-based compression system obtains comparable or even higher compression ratio in lossless compression than that of JPEG2000 and HD-Photo,better rate-distortion performance in lossy compression in most cases,and also gratify subjective visual quality. |
| |
| Keywords: | Dicrete Cosine Transform (DCT) Time Domain Lapped Transform (TDLT) Image compression Matrix factorization Reversible integer transform |
|
| 点击此处可从《光子学报》浏览原始摘要信息 |
| 点击此处可从《光子学报》下载免费的PDF全文 |
