简单的 RGB

简单的RGB示例

  1. import matplotlib.pyplot as plt
  3. from mpl_toolkits.axes_grid1.axes_rgb import RGBAxes
  6. def get_demo_image():
  7.     import numpy as np
  8.     from matplotlib.cbook import get_sample_data
  9.     f = get_sample_data("axes_grid/bivariate_normal.npy", asfileobj=False)
  10.     z = np.load(f)
  11.     # z is a numpy array of 15x15
  12.     return z, (-3, 4, -4, 3)
  15. def get_rgb():
  16.     Z, extent = get_demo_image()
  18.     Z[Z < 0] = 0.
  19.     Z = Z / Z.max()
  21.     R = Z[:13, :13]
  22.     G = Z[2:, 2:]
  23.     B = Z[:13, 2:]
  25.     return R, G, B
  28. fig = plt.figure(1)
  29. ax = RGBAxes(fig, [0.1, 0.1, 0.8, 0.8])
  31. r, g, b = get_rgb()
  32. kwargs = dict(origin="lower", interpolation="nearest")
  33. ax.imshow_rgb(r, g, b, **kwargs)
  35. ax.RGB.set_xlim(0., 9.5)
  36. ax.RGB.set_ylim(0.9, 10.6)
  38. plt.show()

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