import numpy as np
import matplotlib.pyplot as plt
x = np.array([[[1.11,1.12,1.12],[1.21,1.22,1.23],[1.31,1.32,1.33]], [[2.11,2.12,2.12],[2.21,2.22,2.23],[2.31,2.32,2.33]], [[3.11,3.12,3.12],[3.21,3.22,3.23],[3.31,3.32,3.33]] ])
print(255-x*100+78)
plt.imshow(255-x*100+78)
plt.show()