Error using psnr function

I used [peaksnr, snr] = psnr(B, A) wherein A is a binary image and B, the same image but a weiner2 function applied to it.

An error then is outputted

Error using psnr

Expected input number 1, A, to be one of these types:

uint8, uint16, int16, single, double

Instead its type was logical.

Error in psnr>checkImages (line 71)
validateattributes(A,validImageTypes,{'nonsparse'},mfilename,'A',1);

Error in psnr (line 39)
checkImages(A,ref);

Answer 1

[Image Analyst]

So? Just cast it to one of those data types like it suggested.

[peaksnr, snr] = psnr(double(B), double(A))

[Jemela Llanes]

Thank you. It worked and as I try it on other formats, the values of PSNR changes. Is there any basis on which format should I use?

I'm using PSNR to calculate how much an image improved after applying a wiener2 noise removal filter. Is it wise to use this method for this purpose?

[Image Analyst]

I think PSNR is usually used to measure compression/decompression accuracy but I suppose you could use it. I think immse() or computing MAD (mean absolute difference) would be better.