Open In App

Mahotas – Eccentricity of Image

Improve
Improve
Like Article
Like
Save
Share
Report

In this article we will see how we can get the eccentricity of the image in mahotas. Eccentricity measures the shortest length of the paths from a given vertex v to reach any other vertex w of a connected graph. Computed for every vertex v it transforms the connectivity structure of the graph into a set of values. For a connected region of a digital image it is defined through its neighbourhood graph and the given metric. 
 

mahotas.demos.load('lena')

Below is the lena image 
 

 

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

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 
 

Python3




# importing required libraries
import mahotas
import mahotas.demos
from pylab import gray, imshow, show
import numpy as np
import matplotlib.pyplot as plt
   
# loading image
img = mahotas.demos.load('lena')
   
# filtering image
img = img.max(2)
 
print("Image")
   
# showing image
imshow(img)
show()
 
# computing eccentricity value
value = mahotas.features.eccentricity(img)
  
 
# showing value
print("Eccentricity value = " + str(value))


Output :
 

Image

 

 

Eccentricity value = 0.0

Another example 
 

Python3




# importing required libraries
import mahotas
import numpy as np
from pylab import gray, imshow, show
import os
import matplotlib.pyplot as plt
  
# loading image
img = mahotas.imread('dog_image.png')
 
 
# filtering image
img = img[:, :, 0]
   
print("Image")
   
# showing image
imshow(img)
show()
 
# computing eccentricity value
value = mahotas.features.eccentricity(img)
  
 
# showing value
print("Eccentricity value = " + str(value))


Output :
 

Image

 

 

Eccentricity value = 0.7950893156644899

 



Last Updated : 02 Sep, 2021
Like Article
Save Article
Previous
Next
Share your thoughts in the comments
Similar Reads