Mastering OpenCV 4 with Python

Drawing circles

The signature for the cv2.circle() function is as follows:

img = circle(img, center, radius, color, thickness=1, lineType=8, shift=0)

This function draws a circle with a radius radius centered in the center position. Some circles are defined in the following code:

cv2.circle(image, (50, 50), 20, colors['green'], 3)cv2.circle(image, (100, 100), 30, colors['blue'], -1)cv2.circle(image, (200, 200), 40, colors['magenta'], 10)cv2.circle(image, (300, 300), 40, colors['cyan'], -1)

After drawing these circles, we call the show_with_matplotlib(image, 'cv2.circle()')function. The result is shown in the next screenshot:

The full code ...