image-next-file
image-next-file is an interactive compiled Lisp function in `image-mode.el
'.
(image-next-file &optional N)
Visit the next image in the same directory as the current image file.
With optional argument N, visit the Nth image file after the
current one, in cyclic alphabetical order.
This command visits the specified file via `find-alternate-file',
replacing the current Image mode buffer.