in reply to Appending an image to a png file

Can you do that to a PNG file? I thought that a PNG file has within it data to tell how large the image is; so if you append another image to the end of the file, you'll end up with the same image except with junk on the end which is the second image. What does it mean to "append an image to a png file which already has an image"? Why do you want to do this?

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Re^2: Appending an image to a png file
by Nalina (Monk) on Aug 04, 2004 at 05:58 UTC
    If a png file can not be appended, atleast it can be written. How do I write images from 2 different png files to a single png file?

    I tried 
    #!/usr/local/bin/perl   
use Image::Magick;
my($image, $p, $q);  
$image = new Image::Magick;  
$image->Read('d:\\d\\Graph.xls..PNG','d:\\d\\Sample.jpg');    
$image->Write('d:\\pimage.jpg');

    [download]
    but this writes the images to two files 'pimage.jpg.0' & 'pimage.jpg.1'(each having one image). I want both the images to be in a single png file. How do I get it?

    Thanks & Regards

    Nalina
[reply]
[d/l]
      Let's suppose you have two png images, one with a red background with a green circle on it; and the other one with a blue background with a yellow triangle on it. What output would you like to get?
[reply]

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