Percentage variation between two different dimension images?

Hi,

May i know how to calculate the percentage intensity difference between 2 image of the * DIFFERENT DIMENSIONS*. Then i need to apply this % of intensity different to another image of different size.

Answer 1

[Image Analyst]

Why not size them to the same size with imresize() and then just subtract them and divide the difference by one of them? Or use immse(), psnr(), or ssim()? Or do you have some other special definition of how to define the percent variation?

[mangal deep]

Good point to note, but how can I size both the image exactly with equal dimensions..??

[Image Analyst]

Did you look at imresize() documentation? How about

resizedImage2 = imresize(Image2, size(Image1));

That should work for gray scale images - not sure about color ones, try it.

[mangal deep]

Wroks Great... Thanks a lot :)