Description: JPEG压缩解压缩源代码，包含完整的DEMO程序，可以很容易的移植到各平台，例如ARM等等。-JPEG compression extract the source code, including a complete DEMO procedures, can be easily ported to various platforms, such as ARM and so on. Platform: |
Size: 319488 |
Author:刘国涛 |
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Description: qtopia 下的DJVU阅读器源码，可以方便移植到qt环境，其中的djvu库可以在各个平台通用。djvu是一种类似于JPEG2000的图文压缩技术，用于浏览文献和高质量彩图。-under qtopia source DjVu reader, can be easily ported to qt environment, which can DjVu library in various platforms. DjVu is a graphic similar to JPEG2000 compression technology for browsing and high-quality color documents. Platform: |
Size: 899072 |
Author:wangpengli |
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Description: JPEG2000是以小波变换为基础，充分利用了小波变换的优点，既可以实现有损压缩，又可以实现无损压缩，具有丰富的功能-JPEG2000 is a wavelet transform based on full use of the advantages of wavelet transform, we can achieve lossy compression and lossless compression can be achieved with rich functionality Platform: |
Size: 1416192 |
Author:jason |
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Description: VC++实现H.264视频压缩编码技术和实现，过程较为完整-VC++ Achieve H.264 video compression coding technology and the realization of a more comprehensive process Platform: |
Size: 2126848 |
Author:王晓川 |
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Description: 关于JPEG2000压缩标准的另一个模版程序,有比较详细的类函数,和运行说明.-JPEG2000 compression standard on another template procedures, a more detailed type of function, and operation of note. Platform: |
Size: 1668096 |
Author:何文婷 |
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Description: LZMA 是 7-Zip 程序中 7z 格式 的默认压缩算法。LZMA 能提供给用户极高的压缩比及较快的压缩速度，它非常适合与应用程序集成，拥有不错的压缩比。-LZMA is a 7-Zip program 7z format the default compression algorithm. LZMA can provide to users a high compression ratio and faster compression speed, it is very suitable for application integration and has a good compression ratio. Platform: |
Size: 281600 |
Author:xdjm |
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Description: oJPEG2000中DWT的MATLAB实现n the use of discrete cosine transform DCT jpeg compression Matlab source, simple and practical, the Notes have a good time-DWT of MATLAB in oJPEG2000 realize n the use of discrete cosine transform DCT jpeg compression Matlab source, simple and practical, the Notes have a good time Platform: |
Size: 357376 |
Author:小户 |
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Description: 该程序主要实现图像的无损压缩，具体算法包括：
（1）整数小波变换＋SPIHT无损压缩
其中整数小波可以采用JPEG2000提供的5－3小波，也可以采用S＋P变换，本程序均已给出。
（2）DPCM＋算术编码
DPCM采用的是JPEG中采用的方法；
（3）JPEG－LS标准
JPEG－LS的无损压缩性能非常好，超过JPEG2000。-The program mainly realize lossless image compression, the specific algorithm include: (1) integer wavelet transform SPIHT Integer Wavelet lossless compression which can be used to provide the 5-3 wavelet JPEG2000, can also adopt the S P transform, the procedures are given. (2) DPCM arithmetic coding DPCM is used in JPEG methodology (3) JPEG-LS standard JPEG-LS lossless compression of very good performance, more than JPEG2000. Platform: |
Size: 103424 |
Author:yang |
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Description: 这个是二维小波变化的正反变化，采用9/7提升小波系数，在jpeg2000图像压缩系统中使用-This is a change in the pros and cons of two-dimensional wavelet changes, the use of 9/7 lifting wavelet coefficients in JPEG2000 image compression system used in Platform: |
Size: 2048 |
Author:钟毓秀 |
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Description: JPEG-2000静止压缩编码标准的官方文档，pdf格式-JPEG-2000 compression coding standard geostationary official document, pdf format Platform: |
Size: 2484224 |
Author:dengqingeng |
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Description: JPEG2000的C++标准代码，JPEG2000图像压缩基础、标准和实践附带光盘中的KAKADU代码，学习JPEG2000的很好算法-JPEG2000 the C++ Standard code, JPEG2000 image compression based on the standard and practice CD-ROM attached to the Kakadu code, a good learning algorithm for JPEG2000 Platform: |
Size: 477184 |
Author:jamie |
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Description: JPEG2000是新一代静态图像压缩标准，它具有优良的压缩性能和很高的灵活性。介绍了JPEG2000的编码流程，研究了它的核心算法，重点分析了JPEG2000所采用的提升小波变换。并得出JPEG2000与传统的图像压缩标准相比确实具有更加优越的性能的结论.-JPEG2000 is the next generation still image compression standard, it has excellent compression performance and high flexibility. Introduced the JPEG2000 encoding process, to study its core algorithms, the focus of analysis used by the JPEG2000 lifting wavelet transform. And came to the JPEG2000 image compression with the traditional standards we do have a more superior performance conclusions. Platform: |
Size: 202752 |
Author:H Simon |
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Description: 本文介绍了JPEG2000的静态图像压缩技术在TI TMS320DM642 DSP上的实现过程；对压缩技术核心小波算法结构进行改进，对硬件特点的程序结构、具体代码及总线读写等方面的改进作了详细描述．改进后的软件系统，对于1 024×768像素大小的图像、数据存储空间仅需6 KB，使得在资源有限的DSP芯片上能够运行JPEG2000图像压缩技术；编码速度相对于未改进的提高了l2～ 2O倍，可迭到3帧／s；压缩比为O．5 bit／p时，峰值信噪比可达到3O．-This paper introduces the JPEG2000 still image compression technology in the TI TMS320DM642 DSP Implementation process on wavelet compression technology is the core algorithm to improve the structure of the hardware features of the process structure, read and write the specific code and bus improvements, such as was described in detail . The improved software system, for 1 024 × 768 pixel image size, data storage space only 6 KB, allows limited resources to run the DSP chip JPEG2000 image compression technology encoding speed is not improved relative to the improvement of the l2 ~ 2O-fold, again and again to be 3/s compression ratio for O. 5 bit/p, the peak signal to noise ratio can be achieved 3O. Platform: |
Size: 243712 |
Author:H Simon |
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Description: The purpose of this study is to compare between the to methods which is JPEG and JPEG2000 that are using in lossless image compression . Platform: |
Size: 481280 |
Author:mazen |
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Description: 摘 要
文章以空间监控系统为背景,深入研究了JPEG图像压缩标准的实现方法,并基于FPGA对其进行了实现和优化。文中给出了详细的实现方法和优化过程,测试表明达到了很好的效果。
简单介绍了有损静态图像压缩当前有两种比较流行的标准JPEG和JPEG2000。说明了用JPEG方法压缩的原因。
介绍JPEG基本原理：JPEG对灰度图像的压缩处理过程主要包括:图像分割,离散余弦变换(DCT),量化(Quantization),“Z”形排序(Zigzag Scan),差分脉冲编码调制(Differential Pulse Code Modulation,DPCM)对直流系数(DC),行程长度编码(Run-Length Encoding,RLE)对交流系数(AC),霍夫曼(Huffman)编码等。
JPEG标准的特点是离散余弦变换。
比较详细介绍压缩系统的构成和实现。实现提及步骤， JPEG压缩模块设计和编码模块实现细节。
-Abstract
Article in the space monitoring system for the background, in-depth study of the JPEG image compression standard implementation methods and carried out based on FPGA implementation and optimization. In this paper, a detailed method of implementation and optimization of the process, testing showed that to achieve good results.
Easy introduction of harmful static image compression has two kinds of comparisons that the current popular standard JPEG and JPEG2000. Illustrated by the reasons for JPEG compression method.
JPEG introduce the basic principles: JPEG compression of gray-scale image processing include: image segmentation, discrete cosine transform (DCT), quantization (Quantization), "Z"-shaped sort (Zigzag Scan), differential pulse code modulation (Differential Pulse Code Modulation, DPCM) on the DC coefficient (DC), Run Length Encoding (Run-Length Encoding, RLE) of the exchange coefficient (AC), Hoffman (Huffman) coding.
JPEG standard is characterized by discrete Platform: |
Size: 523264 |
Author:压子 |
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Search - jpeg2000 compression