如何在Mollweide视图（Python）中绘制背景图像？

Question

我用天空坐标做天文数据分析。如何将图像作为Mollweide视图的背景？我所尝试的是正常绘制图表并添加：

imag = mpimg.imread('gamma_ray_Fermi.png')
plt.imshow(imag)

但它只返回一个变形的图形，而不是通常的带有背景的绘图。在

Answer 1

感谢用户ImportanceOfBeingErnest的评论，了解了它的工作原理。这是有效的代码：

import numpy as np
import matplotlib.pyplot as plt

data = plt.imread("yourimagehere.png")

fig = plt.figure()
#create axes in the background to show cartesian image
ax0 = fig.add_subplot(111)
ax0.imshow(data)
ax0.axis("off")

# create polar axes in the foreground and remove its background
# to see through
ax = fig.add_subplot(111, projection="mollweide", label="polar") 
#you can change to other projections like "hammer"
ax.set_facecolor("None")

plt.show()