Reading images in Python

Reading images in Python

Python supports very powerful tools when comes to image processing. Let’s see how to process the images using different libraries like OpenCV, Matplotlib, PIL etc.

1. Using OpenCV : OpenCV (Open Source Computer Vision) is a computer vision library that contains various functions to perform operations on pictures or videos. It was originally developed by Intel but was later maintained by Willow Garage and is now maintained by Itseez. This library is cross-platform that is it is available on multiple programming languages such as Python, C++ etc.
   # Python program to read image using OpenCV   # importing OpenCV(cv2) module import cv2   # Save image in set directory # Read RGB image img = cv2.imread('g4g.png')    # Output img with window name as 'image' cv2.imshow('image', img)    # Maintain output window utill # user presses a key cv2.waitKey(0)           # Destroying present windows on screen cv2.destroyAllWindows()

   Output :

   

2. Using MatplotLib : Matplotlib is an amazing visualization library in Python for 2D plots of arrays. Matplotlib is a multi-platform data visualization library built on NumPy arrays and designed to work with the broader SciPy stack. It was introduced by John Hunter in the year 2002. Matplotlib comes with a wide variety of plots. Plots helps to understand trends, patterns, and to make correlations. They’re typically instruments for reasoning about quantitative information.
   # Python program to read  # image using matplotlib   # importing matplotlib modules import matplotlib.image as mpimg import matplotlib.pyplot as plt   # Read Images img = mpimg.imread('g4g.png')   # Output Images plt.imshow(img)

   Output :

   

    

3. Using PIL : PIL is the Python Imaging Library which provides the python interpreter with image editing capabilities. It was developed by Fredrik Lundh and several other contributors. Pillow is the friendly PIL fork and an easy to use library developed by Alex Clark and other contributors.
   # Python program to read # image using PIL module   # importing PIL from PIL import Image   # Read image img = Image.open('g4g.png')   # Output Images img.show()   # prints format of image print(img.format)   # prints mode of image print(img.mode)

   Output :

    
   PNG
   RGBA
   

Last Updated on October 27, 2021 by admin