Question

I have a php script that will receive a bunch of images uploaded.

What I need to do is create a small thumbnail of each, on the fly using imagemagick.

I can do that easy enough but I also need to crop it so that the thumbnail is always 100×100.

the images supplied won’t be the same proportions so simply downsizing won’t work.

Can I downsize, crop to 100×100 and save to jpeg all in one step?

Answer 1

I believe this should do what you want:

convert 'just_uploaded/*' -resize 100x100^ -gravity center -extent 100x100 -set filename:f '%t' +adjoin 'just_uploaded_thumbs/%[filename:f].jpg'

resize will downsize, extent (in combination with gravity) will crop, and the rest takes care of saving with a modified name, in JPEG format, in a different directory.