Color reduction of an image – and Warholize?
[This article was first published on me nugget, and kindly contributed to R-bloggers]. (You can report issue about the content on this page here)
Want to share your content on R-bloggers? click here if you have a blog, or here if you don't.
Want to share your content on R-bloggers? click here if you have a blog, or here if you don't.
There seems to be several methods out there for reducing the colors in an image. I became interested in this after pondering how this is done in the excellent freeware program IrfanView. Unfortunately, their method is not described anywhere that I could find, but I imagine that it is something along the tree data structure collapse method that ImageMagick employes.
The biOps package employes the k-means clustering to arrive at a reduced number of colors. I find that while this method takes a bit longer, the results can actually look a lot better. Just for kicks, I imbedded the imgKMeans() function in another function called warholize() that replaces these reduced color levels with another set. It's definitly not a Warhol, but I still like the effect.
the function…
Read more »
To leave a comment for the author, please follow the link and comment on their blog: me nugget.
R-bloggers.com offers daily e-mail updates about R news and tutorials about learning R and many other topics. Click here if you're looking to post or find an R/data-science job.
Want to share your content on R-bloggers? click here if you have a blog, or here if you don't.