5 ImageMagick command line examples – part 1:

5 ImageMagick command line examples – part 1

By CARSON | Published: JULY 14, 2006

If you have ever wanted to manipulate images under linux you probably have usedGimp. This isn't your only option and if you want to do things from the command line a better option is to use ImageMagick's convert utility.

I've put together 5 simple command line examples that I have found useful. This is just a sample of what you can do with convert. To see more examples and get more explanation of options see: ImageMagick v6 Examples.

I started with the following image as a base for all the examples that follow:

1. Text annotations

Example (simple text in static location):

convert flower.jpg -font courier -fill white -pointsize 20 -annotate +50+50 'Flower' flower_annotate1.jpg

Produces:

Example (text with background at bottom):

convert flower.jpg -fill white -box '#00770080' -gravity South -pointsize 20 -annotate +0+5 ' Flower ' flower_annotate2.jpg

Produces:

Look at these examples to see more.

2. Cropping an image

Example:

convert flower.jpg -crop 128×128+50+50 flower_crop.jpg

Produces:

Look at these examples or -crop for more information.

3. Rotate an image

Example:

convert flower.jpg -rotate 45 flower_rotate45.jpg

Produces:

Look at these examples or -rotate for more information.

4. Image montage

Example:

montage flower.jpg flower_unsharp.jpg -geometry '300×200+20+20' flower_montage.jpg

Produces:

Look at these examples to see more.

5. Animation

Example:

convert flower.jpg -resize 100×100 -font courier -fill white -pointsize 20 -annotate +50+50 'Frame 1' flower_frame1.gif
convert flower.jpg -resize 100×100 -font courier -fill white -pointsize 20 -annotate +50+50 'Frame 2' flower_frame2.gif
convert flower.jpg -resize 100×100 -font courier -fill white -pointsize 20 -annotate +50+50 'Frame 3' flower_frame3.gif
convert flower.jpg -resize 100×100 -font courier -fill white -pointsize 20 -annotate +50+50 'Frame 4' flower_frame4.gif
convert -delay 100 -size 100×100 \
-page +0+0 flower_frame1.gif \
-page +0+0 flower_frame2.gif \
-page +0+0 flower_frame3.gif \
-page +0+0 flower_frame4.gif \
-loop 0 flower_animation.gif

Produces:

Look at these examples, these examples, or these examples for more information.

Summary

That is it for now. Part 2 should be up soon.