Tracking two different colors using OpenCV 2.3 and Python

Question

I'm looking for a way to track two different colors at the same time using a single camera with OpenCV 2.3 (python bindings).

I've read through a number of papers regarding OpenCV but can't find any mention as to whether or not it's capable of analyzing multiple histograms at once.

Is this is even technically possible or do I need a separate camera for each color?

You can do it without separate cameras, you would have to generate two histograms, if you wish to use that technique. — a sandwhich
– a sandwhich, Commented Nov 16, 2011 at 13:36

Abid Rahman K · Accepted Answer · 2012-03-09 12:36:33Z

3

You don't need two cameras. Instead threshold image for two colours and add it. Then use contours to find the blobs. Below is an example,which tracks blue and yellow color separately.

https://github.com/abidrahmank/OpenCV-Python/blob/master/Other_Examples/multi_color_two_object.py

Below is its output:

enter image description here

edited Mar 9, 2012 at 12:36

answered Jan 16, 2012 at 10:56

Abid Rahman K

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jlengrand · Accepted Answer · 2012-03-09 12:40:02Z

0

I don't really understand your concern.

With the camera, you would get an image object. With this image object, you can calculate as much different histograms as you want.

Each histogram would be a different output object :). Basicaly, you could track hundreds of colors at the same time!

answered Mar 9, 2012 at 12:40

jlengrand

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