I'm trying to come up with a way of resizing images in a directory by half (longways). I have already used:
mogrify -resize 50% *
It does resize all the image in the file but width and length ways. I have a "pseudo" idea for:
for images in $picDir; do width = images.width() height images.height() convert -resize $height*$width/2 images
I am not sure if that is the correct way to go through a directory and I cannot find an efficent way to get the height and width of a specific file. I would like to also find a way to do this without using Imagemagick and something that is already pre instaled on a ubuntu machine. If that is possible!