Using python and k-means to find dominant colors in images • Hacker News Board

Re: Using python and k-means to find dominant colors in images

#31

Post by eidorb » Thu, Oct 25, 2012, 8:27 AM UTC

conesus wrote: post #10

Awesome, I used this technique to find the dominant color in favicons so I could create a gradient in NewsBlur. See the effect here: http://cl.ly/KElb Here's the Python I use to do it: https://github.com/samuelclay/NewsBlur/blob/master/utils/Ima... from PIL import Image import scipy import scipy.cluster from pprint import pprint image = Image.open('logo.png') NUM_CLUSTERS = 5 # Convert image into array of values for…

I love subtle flairs like this. It's something that a lot of people would only notice if removed and I think that's an indicator of good design.

Re: Using python and k-means to find dominant colors in images

#32

Post by terhechte » Thu, Oct 25, 2012, 9:36 AM UTC

toby wrote: post #4

Just wanted to say thanks for mentioning my book! I'm so happy that people are still getting value from it.

It's a fantastic book! I read it years ago (I think shortly after it came out), and I still browse it from time to time. I really learned a lot reading it.

Re: Using python and k-means to find dominant colors in images

#33

Post by incision » Thu, Oct 25, 2012, 1:01 PM UTC

toby wrote: post #4

Just wanted to say thanks for mentioning my book! I'm so happy that people are still getting value from it.

>I'm so happy that people are still getting value from it.

I took a look at it a few weeks ago based on a recommendation here on HN and have been enjoying it ever since.

I'm in the process of trying to extend some very basic programming skills and refresh / extend equally basic math.

I started reading expecting something that would assume enough to fly right over in my head. Instead, I found a comfortable pace and very "practical" examples.

Every few pages is a delightful "Ohhhh...So that's how that works." demonstration of things that I've always wondered and theorized about, but never understood the mechanics of.

It's a great book, one that I expect will end up being pretty significant to me.

Re: Using python and k-means to find dominant colors in images

#34

Post by ajtaylor » Thu, Oct 25, 2012, 1:19 PM UTC

toby wrote: post #4

Just wanted to say thanks for mentioning my book! I'm so happy that people are still getting value from it.

I had bought the book a few months ago for work in a big batch, thinking ahead to the time I would need it. That time came a day ago when I needed to do clustering of markers for displaying on a map. A stackoverflow post mentioned the book, so I pulled it out and was wowed! Great stuff so far.

I like that the code is in python, which I find easier to read than the java examples in Algorithms of the Intelligent Web. Being a perl guy (and a perl shop), python feels pretty similar and it's easy to port anything I need. If the rest of the book is as good as the clustering chapter, it's going to be a fun treat for my brain!