I think if you change:

 use Data::Dumper;
 print Dumper(@image_array);
[download]

to

 use Data::Dumper;
 print Dumper \@image_array;
[download]

You will see the type of structure you are aiming for.

On a seperate topic though since you are my %image outside the foreach block you will find that all the elements pushed onto @image_array will be a reference to the SAME hash. (also because just because $image is a hash_ref, apart from the similarities in the name it does not relate in any way to %image.)I doubt this is what you intend. From your second bit of code I would assume what you are looking for is something like:

#!/usr/bin/perl
use warnings;
use strict;

use LWP::Simple;
use LWP::UserAgent;
use HTML::Treebuilder;
use HTTP::Request;
use Data::Dumper;

my $raw_html = LWP::Simple::get("http://www.perlmonks.org")
   || die("$!\n");
      

my $tree = HTML::TreeBuilder->new;
$tree->parse($raw_html);
$tree->eof;

my @image_array;

foreach my $image ($tree->look_down("_tag", "img")){
  push @image_array, $image;
}

print Dumper \@image_array;
[download]

update: Zaxo's solution above nicely skips the accomplishes the same population of the @image_array without the foreach loop.

-enlil