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7z426
- 压缩软件源码，支持格式：7z、ZIP、CAB、RAR、ARJ、LZH、GZIP、BZIP2、Z、TAR、CPIO、RPM 和 DEB 对于 ZIP 及 GZIP 格式，7-Zip 能提供比使用 PKZip 及 WinZip 高 2-10% 的压缩比 7z 格式支持创建自释放(SFX)压缩档案 集成 Windows 外壳扩展 强大的的文件管理 强大的命令行版本 支持 FAR Manager 插件 -compression software source,i
wavelets
- 基于小波变换的图像压缩代码，包括压缩比、运行时间和计算复原图像的峰值信噪比-Image compression based on wavelet transform code, including compression ratio, operation time and recovery images of the peak signal to noise ratio calculation
jpegcompress
- 灰度图像的jpeg压缩处理，解压处理，以及信噪比SNR的计算-Grayscale jpeg image compression, decompression, as well as the calculation of signal to noise ratio SNR
image-compression-with-PCA
- 对400幅灰度图像用分块PCA的方法进行压缩，进行通信时只用传输主元和特征向量。其中，pcaxiefangcha.m用于图像压缩，imresume.m用于图像恢复和部分图像的显示，chaweight.m用于绘制特征值比重-主元个数关系图，crdraw.m用于绘制压缩比-主元个数关系图，psnrdraw.m用于绘制总误差PSNR-主元个数关系图，psnrlocation.m用于绘制单幅图像误差PSNR分布图。-On the 400 block with a gray image compressi
compressor
- 本程序使用C++编写，在VC2005上调试，完成了文件的读取，文件字符的统计以及压缩率的显示，哈夫曼树的建立，哈夫曼编码的实现，文件转换为哈夫曼编码成为压缩文件以及文件从压缩状态进行解码。并且以对话框的形式和用户交流，程序方便实用，既可以对文本进行压缩，有可以对图像进行压缩，效果都不错。-This procedure using C++ Prepared in VC2005 debug completed documents to read, document characters as wel
PTIDR_FILE_COMPRESSION
- 为减少测试数据存储量,提出一种有效的新型测试数据压缩编码———PTIDR 编码,并构建了基于该编码的 压缩P解压缩方案1 PTIDR 编码能够取得比FDR ,EFDR , Alternating FDR 等编码更高的压缩率,其解码器也较简单、 易实现,且能有效地降低硬件开销1 与Selective Huffman , CDCR 编码相比,PTIDR 编码能够得到较高的压缩率面积 开销比1 特别地,在差分测试集中0 的概率满足p ≥017610 时,PTIDR 编码能取得比FDR 编码
Huffman
- MATLAB编写的huffman编解码程序，程序中计算了压缩比。-MATLAB prepared huffman codec procedures, procedures to calculate the compression ratio.
CompressionRatioImage
- How to find compression ratio of an uncompressed image as compared to compressed jpeg images.
2009_Image_Compression_Algorithm_of_SPIHT_Based_on
- 一種基于塊樹結構的SPIHT數字圖像壓縮算法: 在分析圖像經過小波變換后所具有的特性的基礎上,提出了一種改進的SPIHT算法.由于低頻系數占據圖像的百分之九十以上的能量,在圖像的重構中十分重要,所以,對這些系數不進行壓縮而直接傳輸 而最高頻系數相對不重要,所以不做處理,只在圖像重構時以指定的數值予以重構,因此不僅提高了圖像的質量,同時提高了圖像的壓縮率.在具體的算法中,提出了塊樹的結構,減少了算法所需的內存,拓寬了算法的應用范圍.-A tree structure based on the SP
jpeg_encode+decoderhojoon
- This a JPEG encoding & decoding program of still image. It does not use level shifting. Discrete Cosine transform (DCT) is performed both by classical & Chen s Flowgraph methods. Predefined JPEG quantization array & zigzag order are used here. RUN -
contourlet-CP-RLC
- 基于contourlet的图像压缩编码，其中包括计算PSNR值，压缩比和运行时间-Contourlet-based image compression coding, including the calculation of PSNR values, compression ratio and run-time
LZW_Demo
- 实现对图像的lzw压缩编码 得到图像的压缩比以及码长-Lzw realize image compression coding of image compression ratio as well as the code length
wangwei20062218
- 该程序利用Matlab编写，并带有GUI截面。实现了任意格式图像压缩的功能。并且可以对比显示压缩前后图像，显示压缩比例和压缩时间。-The program prepared by the use of Matlab, and with a GUI cross-section. Image compression format to achieve an arbitrary function. Compared before and after the show and can compress
jingdianEZW
- 高光谱图像压缩中的ezw算法，实现了很好的压缩比-Hyperspectral image compression ezw algorithm to achieve a good compression ratio
dpcm
- Lossless image compression plays a very important role in image processing. However, it develops very slowly and it is difficult to improve the efficiency of compression, since complete information and high fidelity are demanded. The lossless compres
12
- 本文所研究的二值图像游程编码数据压缩，就是一种具有高压缩比的无损数据压缩技术，它是应用游程编码的原理对二值图像进行数据压缩的编码技术，其编码非常简单，编码和解码速度快，因此其应用范围广泛。-This paper studied binary image run-length encoding data compression, is a high compression ratio of lossless data compression technology, which is the app
Compression
- Calculate the Mean Square Error (MSE) and the Peak Signal to Noise Ratio (PSNR) for different JPEG compression ratios.
wave-let-based-compression
- this compression based wavelet decomposition the compression ratio would be good
image-compression-final
- DCT算法对图像进行压缩解压，并且计算压缩比-The DCT algorithm to calculate the compression ratio for image compression decompression
FELICS-compression-algorithm
- 标准的FELICS无损图像压缩算法，计算出了改算法的压缩比和运行时间。-Standard FELICS lossless image compression algorithm, the algorithm calculates the change of the compression ratio and the running time.