imshow for 'normal' image formats

[Thomas Weber]

Hi, 

I'm not quite sure with imshow's help. Is imshow() supposed to load
normal formats, ie should
        imshow('file.png')
work?

Quoting imshow's help:
        If a file name is given instead of an image, the file will be
        read and shown.

But looking at the code, it invokes loadimage(), which can only handle
Octave's native image format.

Thanks
        Thomas