ImageMagick Tips & Tricks

imagemagick-tips.sh

# Export an Image from Layered Photoshop PSD from Command Line
# http://davidwalsh.name/export-photoshop-file-image
# usage: export_photoshop_layer website-design 1 ~/file.png
export_photoshop_layer() {
	readonly FILE=$1
	readonly LAYER=$2
	readonly DEST=$3
	convert "${FILE}.psd[${LAYER}]" $DEST
}

# Create Image Thumbnails with ImageMagick
# http://davidwalsh.name/create-image-thumbnails-imagemagick
# usage: create_thumbnail billboard.png 32x32 thumbnail.png
create_thumbnail() {
	readonly FILE=$1
	readonly SIZE=$2
	readonly DEST=$#
	convert $FILE -trim -resize $SIZE $DEST
}

# Get the First Frame of an Animated GIF with ImageMagick
# http://davidwalsh.name/first-frame-animated-gif
# usage: /opt/ImageMagick/bin/convert monkey 0 monkey-frame
create_animated_gif_thumbnail() {
	readonly FILE=$1
	readonly FRAME=$2
	readonly DEST=$#
	convert "${FILE}.gif[$FRAME]" "${DEST}.gif"
}