CODEWITHSUNDEEP
imagemagickthumbnailsimage-scalinggraphicsmagick
Jesper Rasmussen
Jesper Rasmussen

Reputation: 258

Creating multiple thumbnails in ImageMagick / GraphicsMagick

I'm currently writing a shellscript for Bash, that will create different size thumbnails for some rather massive amounts of large images.

I was wondering if it's possible to get GM/IM to create multiple sizes of thumbs in one run, to avoid loading the same image over and over again to create different thumbnails, thus saving memory and time in executing the script ?

Upvotes: 6

Views: 1938

Answers (2)

Isius
Isius

Reputation: 6974

According to this post you can use -write filename with GraphicsMagick to "write the current image to the specified filename and then continue processing ... to produce the various smaller sizes while reading the original image just once".

Upvotes: 2

sarnold
sarnold

Reputation: 104020

You can do it with the ImageMagick Perl bindings, or bindings into any other language of your choice:

#!/usr/bin/perl
use Image::Magick;

my($image, $x);

$image = Image::Magick->new;
$x = $image->Read('sars.png');
warn "$x" if "$x";

$x = $image->Resize(geometry=>'600x600');
warn "$x" if "$x";

$x = $image->Write('x.png');
warn "$x" if "$x";

$x = $image->Resize(geometry=>'400x400');
warn "$x" if "$x";

$x = $image->Write('y.png');
warn "$x" if "$x";

$x = $image->Resize(geometry=>'100x100');
warn "$x" if "$x";

$x = $image->Write('z.png');
warn "$x" if "$x";

The conjure command supports an XML-formatted Magick Scripting Language, but it's harder on my eyes than the Perl version, and the documentation on the Perl bindings is definitely better.

Upvotes: 1

Related Questions