The default Git diff does not show differences between images. That's understandable: it's not intended for that. However, it would be great if Git would show image changes like code changes, wouldn't it? At least something nicer than...

$ git diff
diff --git a/es-ES/images/autobuilder.png b/es-ES/images/autobuilder.png
index 6f5f6eb..6f0dd78 100644
Binary files a/es-ES/images/autobuilder.png and b/es-ES/images/autobuilder.png differ

Something like this:

I've done that using a script that uses the ImageMagick library to compare images. Here's how to do the same thing.