I have searched a lot about opening image inside Emacs. I think ImageMagick will do the trick, but what I don’t seem to be able to find is a way to use this inside Emacs and how to integrate it with Emacs?!
Besides, any better alternative will be appreciated.
Use Image-Dired.
It is already included in Emacs. Just type
M-x image-diredand choose an appropriate directory.