Copying images in Emacs

A few weeks ago I was on vacation. Of course I brought back quite a few pictures with me. When I got back, I sat to select some of them to make a gallery for my family and friends. I started with copying all pictures from two mobile phones and a camera to my laptop. Then I wanted to copy a few carefully chosen images to one directory. To my surprise, Emacs’ Image mode does not have a command to copy the currently viewed image to another directory.