¿Cómo dibujar un círculo en Python usando OpenCV?

How to draw a circle in Python using OpenCV?

OpenCV-Python is a library of Python bindings designed to solve computer vision problems. cv2.circle () method is used to draw a circle on any image. Syntax: cv2.circle (image, center_coordinates, radius, color, thickness) Parameters: image: It is the image on which circle is to be drawn.

To draw a rectangle, you need top-left corner and bottom-right corner of rectangle. This time we will draw a green rectangle at the top-right corner of image. To draw a circle, you need its center coordinates and radius. We will draw a circle inside the rectangle drawn above.

# 1. Draw a simple atom: # 1.a. Creating ellipses # 1.b. Creating circles And to draw the rook we employed MyLine, rectangle and a MyPolygon: # 2. Draw a rook # 2.a. Create a convex polygon Let’s check what is inside each of these functions: The color of the figure will be ( 255, 0, 0 ) which means blue in BGR value. The ellipse’s thickness is 2.

If third argument is False, you will get a polylines joining all the points, not a closed shape. cv.polylines () can be used to draw multiple lines. Just create a list of all the lines you want to draw and pass it to the function.

In all the above functions, you will see some common arguments as given below: color : Color of the shape. for BGR, pass it as a tuple, eg: (255,0,0) for blue. For grayscale, just pass the scalar value. thickness : Thickness of the line or circle etc.

Create a convex polygon Let’s check what is inside each of these functions: The color of the figure will be ( 255, 0, 0 ) which means blue in BGR value. The ellipse’s thickness is 2. Since thickness = -1, the circle will be drawn filled. To draw a filled polygon we use the function fillPoly () . We note that: