Imagemagick Fuzz Transparent

A quick tutorial on using Imagemagick to remove a background colour from images. The image file format needs to support transparency e.g. PNG.

NOTE: JPG doesnt support transparency, so it would be necessary to convert the file.

There is also this method Imagemagick transparency I find the option below to be a bit more flexible.

Remove background color

1. Set the input file

input="old-white.png"

2. Set the output file

output="new-image.png"

3. Set the background color to remove

background_color="white"

4. Set the background to transparent and remove the colour white

convert $input -fuzz 5% -transparent $background_color $output 

In the above example the input image has a white background. Amend the percentage as required.

NOTE: Hex codes can also be used for the background_color parameter

background_color="#ffffff"