Using matplotlib to visualize images

Matplotlib is a very robust data visualization library for the Python 3 programming language. It is also capable of visualizing images. It also offers a wide range of options for plotting, and we will learn many of its capabilities in the later chapters of this book. Let's write a program that displays an image with matplotlib that we read in grayscale mode using the OpenCV cv2.imread() function:

import cv2
img = cv2.imread('/home/pi/book/dataset/4.2.03.tiff', 0)
import matplotlib.pyplot as plt
plt.imshow(img)
plt.title('Mandrill')
plt.axis('off')
plt.show()

Note

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In the preceding example, we are reading an image in grayscale...