def ellipse(img, area: Extent, color, border_thickness):
cv.ellipse(img,
area.get_center().as_point(),
(area.get_size() / 2).as_point(), 0, 0, 360, color,
border_thickness)
def set_area(self, area: Extent):
self.position = area.get_upper_left
self.size = area.get_size()
self.area = area