How to crop image from center without resizing with imagemagick - bash

Question

for parentDir in *
do
cd "$parentDir"
for subDir in *
do
cd "$subDir"
for file in *.*
do
convert "$file" -crop 120x95 summary_"$file"
convert "$file" -crop 160x225 detail_"$file"
done
mkdir detail
mkdir summary
mv summary_* summary/
mv detail_* detail/
cd ..
done
cd ..
done
Here is my script, I need a way to crop the image without resizing, get rid of the extra surrounding.
For example: 1200* 1500 image ----> 120px * 90px from the center

Answer 1

If you are just trying to crop each image to one center part then use
convert input.suffix -gravity center -crop WxH+0+0 +repage output.suffix
Otherwise, you will get many WxH crops for each image.

Answer 2

Thanks to #fmw42 I've made this script to use with my file manager Dolphin, which can be adapted for others as well:
#!/usr/bin/env bash
# DEPENDS: imagemagick (inc. convert)
OLDIFS=$IFS
IFS="
"
# Get dimensions
WH="$(kdialog --title "Image Dimensions" --inputbox "Enter image width and height - e.g. 300x400:")"
# If no name was provided
if [ -z $WH ]
then
exit 1
fi
for filename in "${#}"
do
name=${filename%.*}
ext=${filename##*.}
convert "$filename" -gravity center -crop $WH+0+0 +repage "${name}"_cropped."${ext}"
done
IFS=$OLDIFS

Answer 3

Enother imagemagick based solution.
Here is a scrip version with mogrify to bulk images manipulation instead of convert which works on individual images:
for parentDir in *
do
cd "$parentDir"
for subDir in *
do
cd "$subDir"
mkdir detail
cp * detail/
mogrify -gravity center -crop 160x225+0+0 +repage detail/*
mkdir summary
cp * summary/
mogrify -gravity center -crop 120x95+0+0 +repage summary/*
done
cd ..
done