def augment_rotation(depth):
augment_rotate = []
rows,cols = depth.shape
for i in range(-180,181):
    M = cv2.getRotationMatrix2D(((cols-1)/2.0,(rows-1)/2.0),i,1)
    augment_rotate.append(cv2.warpAffine(depth,M,(cols,rows)))
return augment_rotate