Mahotas - Image Overlay

In this article we will see how we can apply image overlay in mahotas. Image overlay in mahotas create an image which is grayscale, but with possible boolean overlays.

In this tutorial we will use “lena” image, below is the command to load it.

mahotas.demos.load('lena')

Below is the lena image 
 

In order to do this we will use mahotas.overlay method
Syntax : mahotas.overlay(img)
Argument : It takes image object as argument
Return : It returns image object 
 

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]

Below is the implementation  

Output :

Image

Overlay Image

Another example 

Output :

Image

Overlay Image