> I am wondering if there's anything in place already to create an image > thumbnail. This is basically resizing an image.
In the student graphics libraries (2htdp/image and picturing-programs, which is derived from 2htdp/image), you can use "scale" to scale an image up or down by a specified ratio. For that matter, if you want to scale the x and y dimensions differently, you can use "scale/xy". I believe this is a constant-time operation; the number-crunching comes later, when you render it to a bitmap for display on the screen or saving to a PNG file. Stephen Bloch sbl...@adelphi.edu _________________________________________________ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/users