i am executing the code given in the matlab documentation and getting the error'Undefined function 'psnr' for input arguments of type 'double'.

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tina jain
tina jain 2015-3-16
编辑： per isakson 2015-3-16
is psnr is not inbuilt in matlab?
ref = imread('lena256.bmp');
ref=double(ref(:,:,1));
A = imnoise(ref,'salt & pepper', 0.02);
%Calculate the PSNR.
[peaksnr, snr] = psnr(A, ref);
fprintf('\n The Peak-SNR value is %0.4f', peaksnr);
fprintf('\n The SNR value is %0.4f \n', snr);

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回答（1 个）

Meghana Dinesh
Meghana Dinesh 2015-3-16
编辑：Meghana Dinesh 2015-3-16
As far as I know, only A should be of type double. Also, check if you have the necessary toolbox and the right version of MATLAB where psnr is included.
Regards,
Meghana.

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