convert -resize question

beli0135 · 11-28-2009, 04:39 PM

Hi all

I am using ImageMagic's convert to resize images. It has a lots of parameters so I am bit lost..

for example to resize image to 800x600 I use:
convert -resize 800x600

that is OK, but when image is "portrait", it resizes is to Cx600 where C is calculated. That is not desired effect.
It should resize landscape images to 800x600 and Portrait images to 600x800

how do I make that? which parameter?

Thanks

David the H. · 11-28-2009, 05:58 PM

I just came across this need the other day. The secret was to look at the documentation concerning the -resize option, which led me to the details about the image geometry settings.

If the original images already have the aspect ratio you want, then just set both numbers to the maximum value you want: "-resize 800x800". By default it will preserve the aspect ratio while shrinking or enlarging until the larger dimension equals the set value.

beli0135 · 11-28-2009, 06:20 PM

Thank you!