Image Processing with Python

 Python is a high level programming language which has easy to code syntax and offers packages for wide range of applications including numerical computing and graphics designing.

Anaconda is a python distribution which is freely downloadable. You can download and install the anaconda package in your node from the below mentioned link:

https://anaconda.org/anaconda/python

Anaconda includes most of the important packages such as matplotlib, Numpy, Jupyter, Scipy,pandas, scikits-image. You can check all available packages from the anaconda command prompt:

Type :   conda list

These packages will be of great help for plotting figures, mathematical and statistical processing, image processing and machine learning and so on and so forth.

Spyder is an interactive development environment for python. 

You can write your python scripts in the editor and click on the run icon. The result can be viewed on the ipython console.  The variable explorer contains the details /information about the variables initialized and available.

The size of the image is 100 x 200 i.e 100 columns and 200 rows. The image is RGB. i.e it contains Red, Green and Blue component. The positioning starts from 0.

At [0,0] the Red component has the value 254 , Green and Blue component are zero

At [99,0] the Red component is zero , Green component is 255 and the Blue component is zero

At [0,199], all the components are zero

At [99,199], Blue component is 255 , Red and Green components are zero 

Python Script:

import matplotlib.pyplot as plt

img = plt.imread('color.jpg')

plt.imshow(img);

plt.show();

print('Size of the Image:',img.shape);

print('At [0,0] the RGB components are:',img[0,0,:]);

print('At [99,0] the RGB components are:',img[99,0,:]);

print('At [0,199] the RGB components are:',img[0,199,:]);

print('At [99,199] the RGB components are:',img[99,199,:]);

Explanation:

Matplotlib functions are similar to the MATLAB syntax which will be quiet easy for people who are already familiar with MATLAB.

img.shape gives the size of the image. Ie. 100 x 200 x 3

img[0,0,:] indicates the (0,0) position in the image and ‘:’ fetches all the three components from that particular position.

NOTE:

Syntax to clear the console: clear

Syntax to clear the variables: reset