In this article we will see how we can implement riddler calvard method in mahotas. This is alternative of otsu’s method. The Ridler and Calvard algorithm uses an iterative clustering approach. First a initial estimate of the threshold is to be made (e.g. mean image intensity). Pixels above and below the threshold are assigned to the object and background classes respectively.
In this tutorial we will use “luispedro” image, below is the command to load it.
Below is the luispedro image
In order to do this we will use mahotas.rc method
Syntax : mahotas.rc(image)
Argument : It takes image object as argument
Return : It returns numpy.float64
Note : Input image should be filtered or should be loaded as grey
In order to filter the image we will take the image object which is numpy.ndarray and filter it with the help of indexing, below is the command to do this
image = image[:, :, 0]
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