Enjoy Quick Image Editing
Generate GIF from multiple images
# You only need "-dispose previous" if you have images with transparency
convert \
-dispose previous \
img_*.png \
movie.gif
Add text to image
convert input.png \
-gravity north \
-pointsize 90 \
-font Arial \
-fill white \
-annotate +0+100 'Multiple Accounts' \
output.png
Add drop/box shadow to image
convert input.png \
\( -clone 0 -background gray -shadow 80x3+10+10 \) \
\( -clone 0 -background gray -shadow 80x3-5-5 \) \
-reverse \
-background none \
-layers merge +repage \
output.png
Center image inside larger canvas
convert input.jpg \
-gravity center \
-background white \
-extent 50x50+0+0 \
output.jpg
Change background color
convert foo.pdf -background "#eee" -flatten foo.jpg
Replace color with transparency
foo.png -fuzz 25% -transparent red bar.png
Print Image Info (Mac/Linux)
file example.png
Convert Image Type
convert example.png example.jpg
Crop Image
convert foo.png -crop 640x480+50+100 out.png
Crop Image from Center
convert example.png \
-gravity center \
-crop 25x25+0+0 \
example.png
Resize Image (keep aspect ratio)
convert example.png -resize 200x100 example.png
Resize Image (ignore aspect ratio)
convert example.png -resize 200x100! example.png
Resize by Width (keep aspect ratio)
convert example.png -resize 200 example.png
Resize by Height (keep aspect ratio)
convert example.png -resize x100 example.png
Rotate Image
convert example.jpg -rotate 90 example-rotated.jpg
JPG Compression Level
convert example.png -quality 95 example.jpg
Combine Commands
convert example.png \
-resize 400x400 \
-rotate 180 \
-charcoal 4 \
-quality 95 \
example.jpg
Batch Processing
for file in *.jpg; do convert $file -resize 900x600 2x-$file; done
Download Image from URL
curl -O http://example.com/images/example.jpg
