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[Compress-Decompress algrithmsSPIHT(Matlab).zip

Description:

% Matlab implementation of SPIHT (without Arithmatic coding stage)
%
% By Jing Tian, scuteejtian@hotmail.com

fprintf('-----------   Welcome to SPIHT Matlab Demo!   ----------------\n');

fprintf('-----------   Load Image   ----------------\n');
infilename = 'lena512.bmp';
outfilename = 'lena512_reconstruct.bmp';

Orig_I = double(imread(infilename));

rate = 1;

OrigSize = size(Orig_I, 1);
max_bits = floor(rate * OrigSize^2);
OutSize = OrigSize;
image_spiht = zeros(size(Orig_I));
[nRow, nColumn] = size(Orig_I);

fprintf('done!\n');
fprintf('-----------   Wavelet Decomposition   ----------------\n');
n = size(Orig_I,1);
n_log = log2(n);
level = n_log;
% wavelet decomposition level can be defined by users manually.
type = 'bior4.4';
[Lo_D,Hi_D,Lo_R,Hi_R] = wfilters(type);

[I_W, S] = func_DWT(Orig_I, level, Lo_D, Hi_D);

fprintf('done!\n');

fprintf('-----------   Encoding   ----------------\n');
img_enc = func_SPIHT_Enc(I_W, max_bits, nRow*nColumn, level);  

fprintf('done!\n');
fprintf('-----------   Decoding   ----------------\n');
img_dec = func_SPIHT_Dec(img_enc);

fprintf('done!\n');
fprintf('-----------   Wavelet Reconstruction   ----------------\n');
img_spiht = func_InvDWT(img_dec, S, Lo_R, Hi_R, level);

fprintf('done!\n');
fprintf('-----------   PSNR analysis   ----------------\n');

imwrite(img_spiht, gray(256), outfilename, 'bmp');

Q = 255;
MSE = sum(sum((img_spiht-Orig_I).^2))/nRow / nColumn;
fprintf('The psnr performance is %.2f dB\n', 10*log10(Q*Q/MSE));


Platform: | Size: 232873 | Author: jasonchang | Hits:

[Special Effectsget_psnr

Description: 这个是一个获取两个图像相似度的函数,对于图像处理和数字水印方面的编程者来说,会经常去计算两个图像的psnr值,从而来确定图像的相似度,使用matlab可以很方便的计算两个图像的psnr,但是由于matlab专业性很强,而且有没有版权保护,所以对于大批的使用VC语言的这方面的编程者,由于要经常使用而显得很麻烦。 通过调用get_psnr函数可以很方便的就得到两个图像的相似度。 -This is a similarity to obtain a function of two images for image processing and programming aspects of digital watermarking are concerned, will keep the two images to calculate the PSNR value, thereby to determine the similarity of images, the use of matlab can be easily the calculation of the two images psnr, but because matlab highly professional, and has no copyright protection, and therefore the use of a large number of VC language programming in this area, and due to frequent use, there appears to be very troublesome. Get_psnr by calling the function can be easily obtained from the two images on the similarity.
Platform: | Size: 1024 | Author: 莫雨 | Hits:

[Special Effectspsnr

Description: 计算两幅图像的psnr值,非常精确完整,绝对好用-Calculation of two images of the PSNR values, integrity and very precise, the absolute ease of use
Platform: | Size: 1024 | Author: | Hits:

[matlabLSB

Description: 利用LSB算法去实现了电子水印技术。代码完全实现了嵌入以及提取, 算法同时包含了4种攻击算法以及利用psnr测量提取的水印和攻击后提取的水印-This algorithm describes digital watermark technique by using LSB. This code implement embedding and extraction. At the meanwhile, this algorithm includes 4 different kinds of attacks and in the end, measure psnr between extracted watermark and attacked extracted watermark
Platform: | Size: 2048 | Author: 宋春霖 | Hits:

[OtherDWT

Description: 代码利用DWT算法实现了电子水印技术。 其中包括了水印的插入,提取,以及4种不同的攻击。最后,测量了psnr-This algorithm describe digital watermark algorithm by using DWT. It implements embedding, extraction, and 4 different attacks. in the end, it measures psnr
Platform: | Size: 2048 | Author: 宋春霖 | Hits:

[Graph Drawingmymethod

Description: A error concealment sorce code that writed by myself.It s psnr not as good as JM86,but it s good in edge information.Help someone can improve it and it can do something for those strugling for errorcealment of h.264.
Platform: | Size: 1024 | Author: 老何 | Hits:

[Compress-Decompress algrithmsImageCompressed

Description: 利用霍夫曼编码算法对数字图像进行压缩及解压缩处理,解压出来的图像与源图像几乎完全一致,峰值信噪比为无穷大-The use of Huffman coding algorithm for digital image compression and decompression processing, extracting images from the source image is almost exactly the same infinite PSNR
Platform: | Size: 168960 | Author: tianjieyu | Hits:

[Compress-Decompress algrithmscontourlet-CP-RLC

Description: 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
Platform: | Size: 381952 | Author: 刘灿 | Hits:

[Graph programBan-denoising

Description: 本代码是基于Bandelet的硬阈值SAR图像去噪,结果与小波变换进行对比,结果表示其在峰值信噪比,边缘保持系数上均有一定的提高。压缩包中有程序和SAR图像。-This code is based on Bandelet SAR image denoising with a hard threshold .the results were compared with the wavelet transform, and the results indicated that in the peak signal to noise ratio(PSNR)and edge-preserving index(EPI), there is a certain on the increase. There are procedures and SAR images in this compression package.
Platform: | Size: 270336 | Author: 周宇 | Hits:

[matlabBlockMatchingAlgoMPEG

Description: Block Matching Algorithms for Motion Estimation This project contains the project report and source code by Aroh Barjatya for Digital Image Processing Class at Utah State University. Following is a short description of the m files in this zip motionsEstAnalysis.m Script to execute all Algorithms motionEstES.m Exhaustive Search Algorithm motionEstTSS.m Three Step Search Algorithm motionEstNTSS.m New Three Step Search Algorithm motionEstSESTSS.m Simple And Efficient Search Algorithm motionEst4SS.m Four Step Search Algorithm motionEstDS.m Diamond Search Algorithm motionEstARPSm Adaptive Root Pattern Search Algorithm costFuncMAD.m Mean Absolute Difference Function minCost.m minimum cost among macro blocks motionComp.m motion compensated image creator imgPSNR.m finds image PSNR w.r.t. reference image The test images can be found at http://cc.usu.edu/~arohb/caltrain.zip-Block Matching Algorithms for Motion Estimation This project contains the project report and source code by Aroh Barjatya for Digital Image Processing Class at Utah State University. Following is a short description of the m files in this zip motionsEstAnalysis.m Script to execute all Algorithms motionEstES.m Exhaustive Search Algorithm motionEstTSS.m Three Step Search Algorithm motionEstNTSS.m New Three Step Search Algorithm motionEstSESTSS.m Simple And Efficient Search Algorithm motionEst4SS.m Four Step Search Algorithm motionEstDS.m Diamond Search Algorithm motionEstARPSm Adaptive Root Pattern Search Algorithm costFuncMAD.m Mean Absolute Difference Function minCost.m minimum cost among macro blocks motionComp.m motion compensated image creator imgPSNR.m finds image PSNR w.r.t. reference image The test images can be found at http://cc.usu.edu/~arohb/caltrain.zip
Platform: | Size: 118784 | Author: Yashil | Hits:

[matlabImage_Compress

Description: 使用小波技术对图像进行压缩和解压过程,并且通过模拟信道测试计算其PSNR,通过Matlab2009a测试。-Using wavelet methods compress and decompress the image, and testing through analog channels to calculate the PSNR, by Matlab2009a test.
Platform: | Size: 4096 | Author: Alex | Hits:

[matlab062937754BlockMatchingAlgoMPEG_ito

Description: 用matlab编写的块匹配运动补偿程序。包含多个块匹配运动估计算法,可计算每个算法的运算量及补偿结果PSNR-Written by matlab block matching motion compensation procedure. Contains more than one block matching motion estimation algorithm, compute the compensation algorithm and the computational results of PSNR
Platform: | Size: 2926592 | Author: river | Hits:

[Special Effectspsnr

Description: matlab实现的峰值信噪比算法,可用于图像质量的评价-it is about psnr written by matlab~
Platform: | Size: 1024 | Author: 张扬 | Hits:

[Special Effects1234

Description: PSNR是最普遍,最广泛使用的评鉴画质的客观量测法,本代码是通过matlab来实现的。-PSNR is the most common, the most widely used objective evaluation quality measurement method, the code is implemented by matlab.
Platform: | Size: 1024 | Author: 吴琦 | Hits:

[Special EffectsTUXIANGCHULI

Description: 利用matlab求图像的峰值信噪比和均方误差最简单的方法- The easiest way to find image PSNR and MSE by matlab
Platform: | Size: 1024 | Author: wangli | Hits:

[Picture ViewerPSNR

Description: to calculate psnr for images by matlab
Platform: | Size: 237568 | Author: ronik | Hits:

[matlabpsnr_nmse_rms

Description: 通过matlab编写的几个关于PSNR、mse的图像处理的小程序-Several small program written by matlab about PSNR, mse image processing
Platform: | Size: 5120 | Author: 张健杨 | Hits:

[matlabpsnr

Description: matlab实现峰值信噪比psnr计算来比较两幅图像的相似程度,可用于图像修复(use result by compute psnr using matlab)
Platform: | Size: 16384 | Author: veria | Hits:

[Special EffectsMATLAB数字水印[dwt+dct多攻击+GUI界面]

Description: 本课题为基于MATLAB的小波变换dwt和离散余弦dct的多方法对比数字水印系统。带GUI交互界面。有一个主界面GUI,可以调用dwt方法的子界面和dct方法的子界面。流程包括,读取宿主图像和水印图像,嵌入,多种方法的攻击(剪切,加噪,旋转等),提取,最后利用psnr峰值信噪比进行评价不同攻击下,鲁棒性的好坏。(This topic is based on MATLAB wavelet transform DWT and discrete cosine DCT multi method comparison digital watermarking system. With GUI interface. There is a main interface GUI, which can call the sub interface of DWT method and DCT method. The process includes: reading host image and watermark image, embedding, attack of various methods (cutting, adding noise, rotation, etc.), extracting, and finally evaluating the robustness of different attacks by using PSNR peak signal-to-noise ratio.)
Platform: | Size: 32044032 | Author: www.wobishe.com | Hits:

[Special EffectsMATLAB数字水印DWT+DCT+GUI+攻击+psnr

Description: 用Matlab编程实现QR二维码的生成与识别,内含zxing-core-1.7和zxing-j2se-1.7的Zxing开源库,下载下来即可运行使用,无需再去下载相应的Zxing开源库,另外本资源将QR二维码编解码分别封装为函数了,这样使用起来方便。(The generation and recognition of QR QR code is realized by MATLAB programming, which contains the zxing open source library of zxing-core-1.7 and zxing-j2se-1.7. After downloading, it can be used without downloading the corresponding zxing open source library.)
Platform: | Size: 20532224 | Author: just11 | Hits:
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