I wrote a similar script to create thumbnails of images, but instead of using GD, I used some of Tk's functionality. Here's the relevant snippet:
use Tk;
use Tk::JPEG;
use Image::Size;
#..snip..

my $main = new MainWindow;
my $canvar = $main->Canvas()->grid;
#..snip..

# $im_format is either "gif" or "jpeg"
# $_ is full path to file
my $image = $canvar->Photo('-format' => $im_format, -file => $_);

# Using the Image::Size module
my ($x, $y) = imgsize($_);

# An easy number for me to use - YMMV       
my $scale_factor = ceil($x / 100);

# This will be the thumb
my $newimg = $canvar->Photo();

# This is where the magic happens
$newimg->copy($image,'-subsample' =>$scale_factor);

# Write it to file
$newimg->write($thumb_name, -format => $im_format);

# Housekeeping
$image->delete();
$newimg->delete();

#..snip..

[download]


Not super elegant, but it works!

Guildenstern
Negaterd character class uber alles!

In reply to (Guildenstern) Not using GD, but it works... by Guildenstern
in thread GD thumbnail script errors by silent11

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