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"""
===============
Watermark image
===============
Overlay an image on a plot by moving it to the front (``zorder=3``) and making it
semi-transparent (``alpha=0.7``).
"""
import matplotlib.pyplot as plt
import numpy as np
import matplotlib.cbook as cbook
import matplotlib.image as image
with cbook.get_sample_data('logo2.png') as file:
im = image.imread(file)
fig, ax = plt.subplots()
np.random.seed(19680801)
x = np.arange(30)
y = x + np.random.randn(30)
ax.bar(x, y, color='#6bbc6b')
ax.grid()
fig.figimage(im, 25, 25, zorder=3, alpha=.7)
plt.show()
# %%
#
# .. admonition:: References
#
# The use of the following functions, methods, classes and modules is shown
# in this example:
#
# - `matplotlib.image`
# - `matplotlib.image.imread` / `matplotlib.pyplot.imread`
# - `matplotlib.figure.Figure.figimage`
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