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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 Effectsdigitalimage1

Description: 图象的直方图处理及全尺度变换和各种性能指标的计算,如psnr,mse等-image histogram processing and full scale transformation and various performance indicators, such as psnr, mse etc.
Platform: | Size: 177152 | Author: 高颖 | Hits:

[matlabvi2

Description: This program compress and recostruct using wavelets. We can select level of decomposition(here maximum 4 levels are given) of images using selected wavelet. For eg:-wavelets can be haar, db1, db2,dmey............... Decomposition can be viewed in figure. (Please note that select 256X256 image for better result.) Then compression can performed, PERFL2 give compression score. Then reconstruction can be performed. Each decompsition we can choose different threshold values. For each threshold value we can calculate mse,psnr,pq(picture quality), bit ratio etc. To get pq install pqs function . -This program compress and recostruct using wavelets. We can select level of decomposition (here maximum 4 levels are given) of images using selected wavelet.For eg:-wavelets can be haar, db1, db2, dmey ........ ....... Decomposition can be viewed in figure. (Please note that select 256X256 image for better result.) Then compression can performed, PERFL2 give compression score.Then reconstruction can be performed.Each decompsition we can choose different threshold values . For each threshold value we can calculate mse, psnr, pq (picture quality), bit ratio etc. To get pq install pqs function.
Platform: | Size: 3072 | Author: 陈语恬 | Hits:

[Special Effectspsnr_nmse_rms

Description: 通过matlab编写的几个关于PSNR、mse的图像处理的小程序。-Matlab prepared through a few on the PSNR, mse small image-processing procedures.
Platform: | Size: 2048 | Author: 胡国胜 | Hits:

[Special Effectsimage_processing_quantize

Description: 图像处理功能:求the MSE/SNR/PSNR and the quantized image- the MSE/SNR/PSNR and the quantized image
Platform: | Size: 1024 | Author: 员晓毅 | Hits:

[Special Effectsmse

Description: 图像的线性变换与配准 利用Matlab实现图像的配准-image processing
Platform: | Size: 827392 | Author: 图像匹配 | Hits:

[Graph programMSEPSNRandSNR

Description: the criteria of the image denoising to compute the mse,snr,psnr-to compute the mse,snr,psnr
Platform: | Size: 606208 | Author: george feng | Hits:

[Special EffectsGUI

Description: Median filter 3x3,Median filter 5x5, mean filter, wiener filter, PSNR, MSE -a simple gui for image noise removal
Platform: | Size: 14336 | Author: torto | Hits:

[Graph programEvaluate

Description: 评价图形的MSE,SNR,PSNR的GUI。-A GUI to evaluate the image s MSE,SNR and PSNR.
Platform: | Size: 66560 | Author: hu wenrui | Hits:

[matlabobjective_evaluation

Description: 图像评价的几个标准,包括峰值信噪比,均方误差,平均绝对误差,图像保真度,信噪比的MATLAB代码,采用基本编程方法,适合初学者加深图像客观评价标准的理解。-Image evaluation of several criteria, including PSNR, MSE, mean absolute error, image fidelity, signal to noise ratio of the MATLAB code, using the basic programming for beginners to deepen the understanding of the image of objective evaluation criteria.
Platform: | Size: 2048 | Author: 天天 | Hits:

[matlabevaluation

Description: 各种图像融合性能评价参数,包括D,MSE,PSNR,SF,RMSE,NCD,REL,MI,MAE,DREL,EOG,CREF等-Image fusion performance evaluation of various parameters
Platform: | Size: 15360 | Author: 孙鲁兵 | Hits:

[matlabImageQuality_evaluation

Description: 众多matlab代码用于检测图片质量,比如MSE, PSNR等-Several codes based on matlab used to evaluate the quality of image processing such as MSE, PSNR
Platform: | Size: 1064960 | Author: harry | Hits:

[matlabPSNR-and-MSE-(2)

Description: This source code is a matlab code for calculating the difference in image qualities. PSNR and MSE are very helpful for noises and compressions
Platform: | Size: 1024 | Author: Kassa | Hits:

[Graph programmatlab

Description: 常用图像质量评价方法的Matlab代码,其中有ssim + mse + psnr + qilv。-Image quality assessment method used Matlab code, which include ssim+ mse+ psnr+ qilv.
Platform: | Size: 5120 | Author: kelan | Hits:

[matlabpsnr_nmse_rms

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Platform: | Size: 3072 | Author: | Hits:

[2D Graphicimage-quality-evaluation

Description: 该matlab代码主要用于计算图像的边缘强度,信息熵,灰度均值,标准差(均方差MSE),均方根误差,峰值信噪比(psnr),空间频率(sf),图像清晰度,互信息(mi),结构相似性(ssim),交叉熵(cross entropy),相对标准差。- calculate the uation average gradient, edge strength, information entropy, gray are Value, standard deviation (mean square error MSE), root mean square error, peak signal to noise ratio (psnr), spatial frequency (sf), image clarity, mutual information (mi), structure Similarity (ssim), cross-entropy (cross entropy), the relative standard deviation.
Platform: | Size: 9216 | Author: 李伟 | Hits:

[matlabpsnr_nmse_rms

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Platform: | Size: 5120 | Author: 张健杨 | Hits:

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Platform: | Size: 2048 | Author: 王兰 | Hits:

[Special EffectsPSNR-MSE

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Platform: | Size: 27648 | Author: renee | Hits:

[OtherMSE_PSNR

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