I have over 1000 images on different resolutions, (for example 1234x2122, 4400x5212 , etc) and I want to convert all them to fixed 100x100 size, so.
first I need to resize images keeping proportions, and get 100xA or Ax100, where A > 100 ( it depends width and height of image, for some images width > height, and for some images height > width ).
Crop this image to 100x100 from center
Is there a simple convert command, that I can use for all my images ?
You would use the area-fill (^
) geometry modifier on the -resize
operation to unify the down-scale. For cropping the center, -extent
with -gravity Center
will work.
convert input.jpg -resize 100x100^ \
-gravity Center \
-extent 100x100 \
output.jpg
Update
As Mark Setchell pointed out in the comments, the mogrify
utility can be leveraged to batch convert items.
mogrify -path ./path/to/write/results/ \
-resize 100x100^ \
-gravity Center \
-extent 100x100 \
./path/to/source/files/*
Reminder: Mogrify will overwrite original file with resulting image(s), unless you set the
-path
parameter.