BasicLineTypes.py

import cv2
import numpy as np
import matplotlib.pyplot as plt

def ShowWithMatplotlib(img, title):
    imgRGB=img[:, :, ::-1]
    plt.imshow(imgRGB)
    plt.title(title)
    plt.show()

colors={'blue':(255, 0, 0), 'green':(0, 255, 0), 'red':(0, 0, 255), 'yellow':(0, 255, 255),
        'magenta':(255, 0, 255), 'cyan':(255, 255, 0), 'white':(255, 255, 255), 'black':(0, 0, 0),
        'gray':(125, 125, 125), 'rand':np.random.randint(0, high=256, size=(3,)).tolist(),
        'dark_gray':(50, 50, 50), 'light_gray':(220, 220, 220)}

image=np.zeros((20, 20, 3), dtype="uint8")
image[:]=colors['light_gray']
cv2.line(image, (5, 0), (20, 15), colors['yellow'], 1, cv2.LINE_4)
cv2.line(image, (0, 0), (20, 20), colors['red'], 1, cv2.LINE_AA)
cv2.line(image, (0, 5), (15, 20), colors['green'], 1, cv2.LINE_8)
ShowWithMatplotlib(image, 'LINE_4    LINE_AA    LINE_8')