[ic] Interchange should make thumbnails

[Gyepi SAM]

On Fri, Dec 05, 2003 at 01:14:44PM -0500, tom friedel wrote:
> It could use Netpbm utilities to resize an image when it is upoaded.   
> I've done that in the custom shopping carts I've written.  I think 
> thumbnails are best as jpegs as most people have truecolor displays (as 
> opposed to 256 colors). 
> The code I have converts to 'pnm', calls pnmscale, and then calls 
> ppmtojpeg (for example).  If I had more time I would undertake this.  If 
> anyone has any questions feel free to contact me.

You can do this quite easily with Image::Magick, which, of course,
requires the C ImageMagick libraries to be installed also. We use it at
palmdigitalmedia.com for book cover images.

use Image::Magick;
p = new Image::Magick;
p->Read("imagefile");
#You can specify one or both of height and width. 
p->Scale(height => $thumbnail_height);
p->Write("thumbnail-imagefile");

modulo error checking and sizing policies.

-Gyepi

-- 
They know enough who know how to learn.  --Henry Adams