Legacy ImageMagick Discussions Archive

So if I have some images in a folder and I want to change their resolution to 72dpi ?

convert myfolder/* -density 72x72

Now if I want all the images greater than 100px height to keep their aspect ratio but have a height 100 px ?

convert myfolder/* -density 72x72 -resize x100>

Try mogrify rather than convert... Warning mogrify is dangerious. keep a backup copy.

http://www.imagemagick.org/Usage/basics/#mogrify

Resolution and image ratio ... ?