Chapter 21 Working With Images {working-with-images}

Images are a valueable potential source of information, and image processing, including image recognition, is also an important application of machine learning.

We assume you have loaded the following packages:

import numpy as np
import pandas as pd

## /home/otoomet/R/x86_64-pc-linux-gnu-library/4.4/reticulate/python/rpytools/loader.py:120: UserWarning: Pandas requires version '1.3.6' or newer of 'bottleneck' (version '1.3.5' currently installed).
##   return _find_and_load(name, import_)

import matplotlib.pyplot as plt

21.1 Loading images

flag = plt.imread("../img/flag-of-scotland-8x8.png")

## FileNotFoundError: [Errno 2] No such file or directory: '../img/flag-of-scotland-8x8.png'

flag.shape

## NameError: name 'flag' is not defined

np.set_printoptions(precision=2)
flag[:,:,0]  # R

## NameError: name 'flag' is not defined

flag[:,:,1]  # G

## NameError: name 'flag' is not defined

flag[:,:,2]  # B

## NameError: name 'flag' is not defined

_ = plt.imshow(flag)

## NameError: name 'flag' is not defined