How to plot a watermark image in Matplotlib?

To plot a watermark image in Matplotlib, we can take the following steps −

• Set the figure size and adjust the padding between and around the subplots.
• Return a sample data file using get_sample_data() method.
• Create a figure and a set of subplots.
• Plot the data points using plot() method, with alpha=0.7 and marker face color mfc="orange".
• Add a non-resampled image to the figure.
• To display the figure, use show() method.

Example

import numpy as np
import matplotlib.cbook as cbook
import matplotlib.image as image
import matplotlib.pyplot as plt

plt.rcParams["figure.figsize"] = [7.50, 3.50]
plt.rcParams["figure.autolayout"] = True

with cbook.get_sample_data('logo2.png') as file:
im = image.imread(file)

fig, ax = plt.subplots()

ax.plot(np.sin(10 * np.linspace(0, 1)), '-o', ms=20,
         alpha=0.7, mfc='orange')
fig.figimage(im, 10, 10, zorder=3, alpha=.5)

plt.show()

Output