detect.py 文件源码

def solidity(contour, hull=None, area_min=0):
        """
        Calculate the solidity of a contour, which is the ratio of its area to the
        area of its convex hull.

        :param contour: the target contour
        :param hull: the convex hull of the contour, see cv2.convexHull(contour)
        :param area_min: a contour with an area below the minimum has a solidity of 0
        """
        if hull is None:
            hull = cv2.convexHull(contour)
        try:
            contour_area = cv2.contourArea(contour)
            hull_area = cv2.contourArea(hull)
            return contour_area / hull_area if hull_area > area_min else 0
        except ArithmeticError:
            return 0