bash script to resize each image in a directory

vonbiber · 04-16-2012, 05:56 AM

with ImageMagick you can get the width and height of an image by running:

Code:

image=yourimage.png
width=$(identify -format '%w' $image)
height=$(identify -format '%h' $image)

Then you can use $width and $height as the dimensions of the picture you want to resize.
You can resize a picture so that its width and/or height doesn't go
beyond a certain dimension:

Code:

convert yourimage.png -resize '128x128>' resized.png

Check this web site for a lot of examples:
http://www.imagemagick.org/Usage/

dugan · 04-16-2012, 09:08 AM

I've blogged something quite similar, getting the resolution and determining the aspect ratio and relocating the resized images and all:

http://duganchen.ca/converting-manga-to-kindle-format/

Quote:

I need to pass sucesively on each image in the directory himself and in directory that are inside the main one. Some time the image are even in a third or fourth directory

Use "find -exec".