Legacy ImageMagick Discussions Archive

Hi there

Image Magick is indeed a great software with many many feautures.

I am trying for some weeks now to find a way to compare 2 images
in command line and instead of returning me the comparison image
i want to return me the percentage of similarity of these 2 images but without
luck.

Does anybody know if this is doable and maybe show us a command tip??

See the documentation on "compare", eg will return a numerical measure of the difference between the two frames. Higher numbers are more different.

Can you define exactly what you mean by "percentage of similarity"?

Hi snibgo Thanks for answering

Sorry for not being very straight with my answer.
What i mean is if there is a command that will take as input 2 images
and will return a percentage of how much they are similar
meaning 2 identical images as input will return a 100 or something output

I answered before checking out your suggestion just for making clear
what i mean, i am going to check out your suggestion

Thanks Again
Marios

I understand that 100% means the images are identical. But I don't know what you want 50% or 0% to mean.

The command above will return zero when the images are identical.

I just used the command you posted me and it actually works great it compares
the 2 images and it returns a number that i wanted (i dont know if its a percentage
but i dont realy care) now i am going to make some test to see what exactly these
numbers are, you said that 0 are identical above, then the bigger the number the
more the distance between the 2 images, so i have something to work now.

Thanks a lot

see compare statistics at the bottom of this page http://www.imagemagick.org/Usage/compare/#compare

thanks fmw42 that was helpfull
it has realy good staff for me there

mariosserhan wrote:I just used the command you posted me and it actually works great it compares
the 2 images and it returns a number that i wanted (i dont know if its a percentage
but i dont realy care) now i am going to make some test to see what exactly these
numbers are, you said that 0 are identical above, then the bigger the number the
more the distance between the 2 images, so i have something to work now.

Thanks a lot

hello,how about your result of the number,i have the same question with you