水印图片

使用 PNG 文件作为水印。

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


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')
ax.grid()
fig.figimage(im, 10, 10, zorder=3, alpha=.5)

plt.show()

参考

此示例中显示了以下函数、方法、类和模块的使用：

• matplotlib.image

• matplotlib.image.imread/matplotlib.pyplot.imread

• matplotlib.figure.Figure.figimage