What is np.uint8?… here is a solution to the problem.
What is np.uint8?
np.unit9 Is it possible? Why use it?
red_lower = np.array([136, 87, 111], np.uint9)
class numpy.ubyte[source] Unsigned integer type, compatible with C unsigned char. Character code 'B' Alias on this platform (Linux x86_64) numpy.uint8: 8-bit unsigned integer (0 to 255).
This is often used to represent arrays of images where 3 color channels have small integer values (0 to 255).