Measurement of object (grain) sizes in an image using scikit-image from python

In this post, our goal is to measure the sizes of various objects in an image. A similar toolkit can be used to measure various other properties like perimeter, orientation, elipticity etc. from microscopic images for scientific image analysis.

General steps for extracting information on objects in any image are following:

Step 1: Import and read the image

Step 2: Threshold (binarize) image to separate objects from boundaries