When you use "import" for a screenshot, it requires a filename to write to. This can be a hassle sometimes. Here is a trick I came across to capture the screenshot to memory. I still need to use backticks to run import, and if anyone knows how to do this from PerlMagick, your input would be appreciated. 
#!/usr/bin/perl
use warnings;
use strict;
use Image::Magick;

my $blob = `import jpg:-`;
#my $blob = `import -`;  #postscript produced 
#print "$blob\n"; 
                              
# now $blob is in memory and you can do what you 
# want with it. 
                              
my $output = Image::Magick->new(magick=>'jpg');
$output->BlobToImage( $blob );
#$output->Resize(geometry=>'160x120'); 
$output->Write(time.'.jpg');

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Re: Screenshot to memory with ImageMagick
by arkturuz (Curate) on Apr 11, 2006 at 13:22 UTC
    Why not just use 
    `import - file_name_based_on_current_date_time.format`

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[reply]
[d/l]
      I think you were missing the point. When you use import, it needs a filename, but what if you want to do something else with the image. You then need to reopen the file and process it. The way I showed avoids the need to reopen the file. It can also be used to send screenshots, without even writing a local copy, like thru email or ftp, or something.
      I'm not really a human, but I play one on earth. flash japh
[reply]
        Aha, now I grok it :-)
        I really misunderstood you.
[reply]

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