Image Quality Measures: PeakSignaltoNoiseRatio(origImg, distImg) - File Exchange

Code covered by the BSD License

Highlights from
Image Quality Measures

AverageDifference(origImg, di... Program for Average Difference Calculation
MaximumDifference(origImg, di... Program for Maximum Difference Calculation
MeanSquareError(origImg, dist... Program for Mean Square Error Calculation
NormalizedAbsoluteError(origI... Program for Normalized Absolute Error Calculation
NormalizedCrossCorrelation(or... Program for Normalized Cross Correlation Calculation
PeakSignaltoNoiseRatio(origIm... Program for Peak Signal to Noise Ratio Calculation
StructuralContent(origImg, di... Program for Structural Content Calculation
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from Image Quality Measures by Athi
Image quality measures are calculated for a distorted image with reference to an original image

PeakSignaltoNoiseRatio(origImg, distImg)

%Program for Peak Signal to Noise Ratio Calculation

%Author : Athi Narayanan S
%M.E, Embedded Systems,
%K.S.R College of Engineering
%Erode, Tamil Nadu, India.
%http://sites.google.com/site/athisnarayanan/
%s_athi1983@yahoo.co.in

function PSNR = PeakSignaltoNoiseRatio(origImg, distImg)

origImg = double(origImg);
distImg = double(distImg);

[M N] = size(origImg);
error = origImg - distImg;
MSE = sum(sum(error .* error)) / (M * N);

if(MSE > 0)
    PSNR = 10*log(255*255/MSE) / log(10);
else
    PSNR = 99;
end

Highlights from Image Quality Measures

Highlights from
Image Quality Measures