Crop

use Image::Magick;

$i = Image::Magick->new;
$i->Read('original.jpg');

$i2 = $i->Clone();
$i2->Crop(geometry=>'100x100+75+75');
$i2->Write('Crop1.jpg');

$i2 = $i->Clone();
$i2->Crop(width=>100, height=>100, x=>95, y=>80);
$i2->Write('Crop2.jpg');