ruby - RMagick remove white background from image and make it transparent - Stack Overflow

I need to remove the white background from this image and make the background transparent. So it's just a black tick on the transparent background exported as a png. e.g. Turn Into Any ideas?

GitHub - carrierwaveuploader/carrierwave: Classier solution for file uploads for Rails, Sinatra and other Ruby web frameworks

Posts Damian Nicholson

Masks -- IM v6 Examples

Planet Vala

Bitmap/Flood fill - Rosetta Code

Make PNG font samples with ImageMagick - DEV Community

Álvaro Ramírez

ruby - RMagick remove white background from image and make it transparent - Stack Overflow

How does Ruby on Rails compare with the MEAN stack? - Quora

DHQ: Digital Humanities Quarterly: Minimal Computing from the Labor Perspective