Drawing rectangles

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

img = rectangle(img, pt1, pt2, color, thickness=1, lineType=8, shift=0)

This function draws a rectangle given the two opposite corners, pt1 and pt2:

cv2.rectangle(image, (10, 50), (60, 300), colors['green'], 3)
cv2.rectangle(image, (80, 50), (130, 300), colors['blue'], -1)
cv2.rectangle(image, (150, 50), (350, 100), colors['red'], -1)
cv2.rectangle(image, (150, 150), (350, 300), colors['cyan'], 10)

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

Remember that negative values (for example, -1) for the thickness parameter mean that a filled shape will be drawn.