Is there a website or program where you can input two images, and it shows you the differences between them?

Something like this would be useful for determining if a "repost" is actually slightly different from the original.

Open both images in different tabs and see them side by side (or switch between both tabs). That's what I do.

Oh, and looking at the info for both posts (type, size, width and height)

I just open them in two tabs and then swap back and forth between them real quick to see if I can spot any differences. It's fun sometimes.

I guess you mean more like something you can automate to run on uploads?

I just use paint.net or pirate photoshop, the layers they have are easy for pointing out difference between 2 images where one might be traced :v

Why would you pirate Photoshop when you can just use GIMP for free?

Foobaria said:
Why would you pirate Photoshop when you can just use GIMP for free?

Why would you use GIMP when you can just pirate Photoshop for free?

Wolframite said:
Why would you use GIMP when you can just pirate Photoshop for free?

Why would you pirate Photoshop and use GIMP when you can look at two images one after another on different tabs?

Foobaria said:
Why would you pirate Photoshop when you can just use GIMP for free?

Wolframite said:
Why would you use GIMP when you can just pirate Photoshop for free?

Xch3l said:
Why would you pirate Photoshop and use GIMP when you can look at two images one after another on different tabs?

Why would you look at two images in tabs, when you can do the same thing using Paint.NET for free?

Xch3l said:
Why would you pirate Photoshop and use GIMP when you can look at two images one after another on different tabs?

Why would you compare them in two different tabs if you can simply delete both of them?

NotMeNotYou said:
Why would you compare them in two different tabs if you can simply delete both of them?

Why delete both of them when you can just print both pictures, mash them into a soup, then compare their flavors?

ヽ(゜o。)ノ

Wolframite said:
Why delete both of them when you can just print both pictures, mash them into a soup, then compare their flavors?

ヽ(゜o。)ノ

Why would you print both pictures, mash them up into a soup then compare their flavors....when you can print both pictures, chop it up into little pieces, then crush up the little pieces into dust, snort it like pure cocaine, then shit it out and flush it down the toilet?

Conker said:
Why would you print both pictures, mash them up into a soup then compare their flavors....when you can print both pictures, chop it up into little pieces, then crush up the little pieces into dust, snort it like pure cocaine, then shit it out and flush it down the toilet?

Why would you continue this stupid combo when you could just break it.

You could also compare them in a hex editor. :3

Xch3l said:
Why would you pirate Photoshop and use GIMP when you can look at two images one after another on different tabs?

Isn't the file size and creation date sufficient?
I write tools like the one you might be seeking...

Mikorians said:

I write tools...

Well now... :3

Don't get too excited, they're for an obsolete system, but some can be made to work under a modern OS. I'm still working my way up to XP now.
I do write fair stuff.
I think...

Ah.

And someone would need to figure out the compression formats and a .chb tool would be good too.

Mikorians said:
Isn't the file size and creation date sufficient?
I write tools like the one you might be seeking...

Filesize, compression, resolution, useless EXIF-Data and Filetype all play a role in the storage of the picture alone, you would however still need to add the differences in the picture itself, like different filters or a tiny edit somewhere.

So a simple hash difference will sadly not be enough in this case.
Especially since the server already does that for us.

So you'd rather have an AI that performs a pixel by pixel comparison.
I've done this also.
But only for common formats (bmp, jpg, gif)

Say a minute or two a pic...
Wouldn't handle tags, but a pass for byte differences, and report on the image similarity?

Mm. Strikes me that jpg quantization will show up as pixel differences, does this matter? Technically the images ARE different.

If you're not afraid of using a command-line tool: use PerceptualDiff, it's awesome.

http://pdiff.sourceforge.net/

http://sourceforge.net/projects/pdiff/files/pdiff/perceptualdiff-1.1.1/perceptualdiff-1.1.1-win.zip/download

Sounds better to me.

Does it need a GUI?
I could probably write one, but...