OpenCV basics continued...Draw Rectangles, Circles, Ellipses and Polylines Similarly draw

Similarly draw other shapes, now begin with defining our wrapper functions for drawing shapes, like the above draw_line() function.

1 def draw_rectangle(image, top_left, bottom_right,

2 color=(255,255,255),

3 thickness=1,

4 line_type=cv2.LINE_AA):

5 cv2.rectangle(image, top_left, bottom_right,

6 color, thickness, line_type)

7

8 def draw_circle(image, center, radius,

9 color=(255,255,255),

10 thickness=1,

11 line_type=cv2.LINE_AA):

12 cv2.circle(image, center, radius, color, thickness, line_type)

13 

14 def draw_ellipse(image, center, axes, angle, start_angle, end_angle,

15 color=(255,255,255),

16 thickness=1,

17 line_type=cv2.LINE_AA):

18 cv2.ellipse(image, center, axes, angle, start_angle, end_angle,

19 color, thickness, line_type)

20

21 def draw_polylines(image, points,

is_closed=True,

22 color=(255,255,255),

23 thickness=1,

24 line_type=cv2.LINE_AA ):

25 cv2.polylines(image, points, is_closed,

26 color, thickness, line_type)

The results look like Figure shown below-