rgb = np.dstack((r,g,b)) # stacks 3 h x w arrays -> h x w x 3
还要将浮点数0 .. 1转换为uint8 s，
rgb_uint8 = (np.dstack((r,g,b)) * 255.999) .astype(np.uint8) # right, Janna, not 256
rgb = np.dstack((r,g,b)) # stacks 3 h x w arrays -> h x w x 3
还要将浮点数0 .. 1转换为uint8 s，
rgb_uint8 = (np.dstack((r,g,b)) * 255.999) .astype(np.uint8) # right, Janna, not 256
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