thumbnails with imagemagick
So you want little square thumbnails like Flickr. Here is a bash script that uses imagemagick to generate square thumbnails.
makethumb:
#!/bin/bash
#
# makethumb
#
# A bash script to generate square thumbnails using imagemagick.
#
# Feel free to use and abuse, its just a script. Requires imagemagick!
# See www.websurfshack.net for more stuff like this
#
if [ "$1" = "" ]; then
echo "Usage: makethumb source_file [size] [output file]"
echo ""
echo "e.g."
echo " makethumb large.jpg"
echo " makethumb large.jpg 65"
echo " makethumb large.jpg 45 thumb.jpg"
echo " makethumb large.jpg 25 thumb.gif"
echo ""
echo "Note: You may specify an output file of a different type to the source. The image will be converted automatically to that type."
echo ""
exit
fi
if [ ! -e "$1" ]; then
echo "Input file "$1" not found. Please specify a valid input file!"
exit
fi
ORIG_FILE="$1"
if [ "$2" = "" ]; then
SIZE="45"
else
SIZE="$2"
fi
if [ "$3" = "" ]; then
THUMB_FILE="THUMB_${ORIG_FILE}"
else
THUMB_FILE="$3"
fi
echo "Creating ${SIZE}x${SIZE} thumbnail '${THUMB_FILE}' from source image '${ORIG_FILE}'"
#Grab the image dimensions
WIDTH=`identify -format '%w' ${ORIG_FILE}`
HEIGHT=`identify -format '%h' ${ORIG_FILE}`
echo "Source image is ${WIDTH}x${HEIGHT}"
if [ $WIDTH = $HEIGHT ]; then
echo "Image is already square so just resizing..."
`convert ${ORIG_FILE} -thumbnail "${SIZE}x${SIZE}" -strip ${THUMB_FILE}`
else
if [ $WIDTH -gt $HEIGHT ]; then
echo "Image is landscape"
`convert ${ORIG_FILE} -resize "x${SIZE}" -gravity NorthWest -crop ${SIZE}x${SIZE}+0+0 +repage -strip ${THUMB_FILE}`
fi
if [ $WIDTH -lt $HEIGHT ]; then
echo "Image is portrait"
`convert ${ORIG_FILE} -resize "${SIZE}" -gravity NorthWest -crop ${SIZE}x${SIZE}+0+0 +repage -strip ${THUMB_FILE}`
fi
fi
NEWFILEDATA=`identify ${THUMB_FILE}`
echo "Output file: ${NEWFILEDATA}"
echo "Done!"