Resizing the image in php for viewing purposes only

Question

Okay, the reason I posted this is because I wasn\'t sure what to search for. I\'ll try to explain it as clearly as I can.

Say, I have an image sized 800x600. The box

Answer 1

I have a shell script in place that does exactly what you need with ImageMagick:

#!/bin/sh
SOURCE='/path/to/img'
FILE='myfile.jpg'

convert $SOURCE/$FILE -thumbnail 150x150^\> -quality 85% \
        -gravity center -extent 150x150 ${SOURCE}150/$FILE

• This resizes to a box covering 150x150 - the ^ after 150x150 is essential!
• The -thumbnail option strips all meta-information except for color profiles and is very fast.
• Then it cuts a box with 150x150 from the center (-gravity center -extent 150x150) - exactly what you want.
• In addition I set -quality 85% which should be plenty while reducing file size a lot.
• In this example I take the image from an img directory and write the thumbnail with the same filename to a img150 directory right next to it.

Experiment for best results.

I had help from:
http://www.imagemagick.org/Usage/files/
http://www.imagemagick.org/Usage/resize/
http://www.imagemagick.org/script/command-line-options.php#thumbnail