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q1.matlab 分形压缩研究
- matlab 分形压缩研究 分形压缩拥有很高的压缩比，用MATLAB实现时间较C要长 这里供参考,matlab fractal compression Fractal compression research has a high compression ratio, using MATLAB to achieve a longer time than C here for reference
A_new_algorithm_of_image_compress_based_on_BP_neur
- 本文探讨了神经网络用于图像压缩的方法，提出了一种基于边缘信息检测的BP神经网络压缩方法:按图像各部分像素特征将图像分为平滑块、纹理块和边缘块，不同的分类块采用不同的隐含层数。实验结果证明本算法在在保证重建图像丰富细节的同时，能大大提高图像的压缩比。-This paper discusses the neural network for image compression method, edge information is presented based on BP neural networ
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
wavelets
- 基于小波变换的图像压缩编码，实现了多种小波变换，并且实现了12:1的高压缩率。-Based on Wavelet Transform Image Coding, to achieve a variety of wavelet transform, and achieved a high 12:1 compression ratio.
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.
compression
- 对图像进行压缩，包括DCT变换，量化，游程编码。有良好的压缩比和压缩率。-Image compression, including DCT transform, quantization, run-length coding. A good compression ratio and compression ratio.
comprsn-ratio
- How to find compression ratio of image file
CompressionRatioImage
- How to find compression ratio of an uncompressed image as compared to compressed jpeg images.
ObjectiveFidelityCriteria
- 本实验要求编写一个计算压缩-解压缩图像的均方根误差、均方信噪比的程序。该程序是一个通用程序。编写程序产生图示的结果。使用上面的保真度准则程序计算可视信息的损失特性。-Prepared in this experiment, a calculation of compression- decompression of the root-mean-square error of image, mean square signal to noise ratio of the procedure. Th
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
decoderprog
- fractal image compression of gray scale images.... only works for square images... try with lena.bmp a gray scale one.... good compression ratio acheived
Compression
- Calculate the Mean Square Error (MSE) and the Peak Signal to Noise Ratio (PSNR) for different JPEG compression ratios.
myidwt1
- matlab环境的小波压缩算法，给予dwt的心电图压缩，滤去了高频分量，具有较高的压缩比率-matlab environment wavelet compression algorithm, giving dwt ECG compression, filter the high frequency components with high compression ratio
quawdty-compression-ratio
- Cosine transform compression, used for image compression, the compression ratio is high, and the quality of compressed image is still very good