Counting the number of objects in an image based on colour

I have several images from optical microscopes that contain features of different types of minerals. Is there a way to segment the image such the regions pertaining to a particular mineral type can be identified? An example of my image can be found here:

My image will contain several such objects. I've also inserted an example of the sort of segmentation I need to perform.

Any ideas would be helpful!

Answer 1

[Nikhil Sonavane]

You may refer to this documentation for further details and modify the code according to your need