What's a quick and easy tool for resizing (as in changing the default screen size) of a Jpeg file? I have some scanned images that I want to display smaller on web pages and, although gimp will do it, it does seem a bit of a sledgehammer to crack a nut.
It would be nice to be able to just say something like:-
someProgram -x 400 -y 200 <old.jpg >new.jpg
Going further, is it easy/possible to change the size of an image according to the size of the browser window being used? I use a 1600x1200 display at home so a 400x200 image will be quite small really but if anyone looks at the same page on (say) 800x600 it's going to be a bit on the large size.