图像切片查看器

滚动三维阵列的二维图像切片。

图像切片查看器

  1. import numpy as np
  2. import matplotlib.pyplot as plt
  5. class IndexTracker(object):
  6.     def __init__(self, ax, X):
  7.         self.ax = ax
  8.         ax.set_title('use scroll wheel to navigate images')
  10.         self.X = X
  11.         rows, cols, self.slices = X.shape
  12.         self.ind = self.slices//2
  14.         self.im = ax.imshow(self.X[:, :, self.ind])
  15.         self.update()
  17.     def onscroll(self, event):
  18.         print("%s %s" % (event.button, event.step))
  19.         if event.button == 'up':
  20.             self.ind = (self.ind + 1) % self.slices
  21.         else:
  22.             self.ind = (self.ind - 1) % self.slices
  23.         self.update()
  25.     def update(self):
  26.         self.im.set_data(self.X[:, :, self.ind])
  27.         ax.set_ylabel('slice %s' % self.ind)
  28.         self.im.axes.figure.canvas.draw()
  31. fig, ax = plt.subplots(1, 1)
  33. X = np.random.rand(20, 20, 40)
  35. tracker = IndexTracker(ax, X)
  38. fig.canvas.mpl_connect('scroll_event', tracker.onscroll)
  39. plt.show()

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