open OUT,">$ID.png"; 
binmode OUT; 
print OUT $im->png; 
close OUT;

[download]
That's not right. You want to print the png to STDOUT, so do something like this: 
#!/usr/bin/perl

use strict;
use warnings;
use GD;
use GD::Image;

my $im_width = 1000; 
my $im_height = 1000;

my $im =  GD::Image->newTrueColor($im_width, $im_height);

my $white = $im->colorAllocate(255,255,255);
my $black = $im->colorAllocate(0,0,255);
my $red   = $im->colorAllocate(255,0,0);
my $blue  = $im->colorAllocate(0,0,255);

$im->rectangle(0,0,99,99,$black);
$im->arc(50,50,95,75,0,360,$blue);
$im->fill(50,50,$red);

my $pngdata = $im->png;
open (DISPLAY,"| display -") || die;
binmode DISPLAY;
print DISPLAY $pngdata;
close DISPLAY;

[download]

In reply to Re: How to increase the resoultion of an PNG image by Khen1950fx
in thread How to increase the resoultion of an PNG image by vinumanikandan

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