Approximate circle by area

tomni.contour_operations.approximate_circle_by_area(contour: numpy.ndarray) → Tuple[float, float, float]

Approximate a circle with the same area and center as the given contour.

Parameters

contour (np.ndarray) – An OpenCV contour of a single object.

Returns

A tuple containing the following values:

• x (float): Center x position of the approximate circle.

• y (float): Center y position of the approximate circle.

• radius (float): Radius of the approximate circle.

Return type

Tuple[float, float, float]

Example:

contour = np.array([[[1, 2]], [[2, 3]], [[3, 2]], [[2, 1]]])
center_x, center_y, circle_radius = approximate_circle_by_area(contour)
(2.0, 2.0, 1.0)