Features

area_center_points_xld		Area and center of gravity (centroid) of contours and polygons treated as point clouds.
area_center_xld		Area and center of gravity (centroid) of contours and polygons.
circularity_xld		Shape factor for the circularity (similarity to a circle) of contours or polygons.
compactness_xld		Shape factor for the compactness of contours or polygons.
contour_point_num_xld		Return the number of points in an XLD contour.
convexity_xld		Shape factor for the convexity of contours or polygons.
diameter_xld		Maximum distance between two contour or polygon points.
dist_ellipse_contour_points_xld		Compute the distances of all contour points to an ellipse.
dist_ellipse_contour_xld		Distance of contours to an ellipse.
dist_rectangle2_contour_points_xld		Compute the distances of all contour points to a rectangle.
eccentricity_points_xld		Anisometry of contours or polygons treated as point clouds.
eccentricity_xld		Shape features derived from the ellipse parameters of contours or polygons.
elliptic_axis_points_xld		Parameters of the equivalent ellipse of contours or polygons treated as point clouds.
elliptic_axis_xld		Parameters of the equivalent ellipse of contours or polygons.
fit_circle_contour_xld		Approximation of XLD contours by circles.
fit_ellipse_contour_xld		Approximation of XLD contours by ellipses or elliptic arcs.
fit_line_contour_xld		Approximation of XLD contours by line segments.
fit_rectangle2_contour_xld		Fit rectangles to XLD contours.
get_contour_angle_xld		Calculate the direction of an XLD contour for each contour point.
get_contour_attrib_xld		Return point attribute values of an XLD contour.
get_contour_global_attrib_xld		Return global attributes values of an XLD contour.
get_regress_params_xld		Return XLD contour parameters.
info_parallels_xld		Return information about the gray values of the area enclosed by XLD parallels.
length_xld		Length of contours or polygons.
local_max_contours_xld		Select XLD contours with a local maximum of gray values.
max_parallels_xld		Join modified XLD parallels lying on the same polygon.
moments_any_points_xld		Arbitrary geometric moments of contours or polygons treated as point clouds.
moments_any_xld		Arbitrary geometric moments of contours or polygons.
moments_points_xld		Geometric moments M20$M_{20}$, M02$M_{02}$, and M11$M_{11}$ of contours or polygons treated as point clouds.
moments_xld		Geometric moments M20$M_{20}$, M02$M_{02}$, and M11$M_{11}$ of contours or polygons.
orientation_points_xld		Orientation of contours or polygons treated as point clouds.
orientation_xld		Orientation of contours or polygons.
query_contour_attribs_xld		Return the names of the defined attributes of an XLD contour.
query_contour_global_attribs_xld		Return the names of the defined global attributes of an XLD contour.
select_contours_xld		Select XLD contours according to several features.
select_shape_xld		Select contours or polygons using shape features.
select_xld_point		Choose all contours or polygons containing a given point.
smallest_circle_xld		Smallest enclosing circle of contours or polygons.
smallest_rectangle1_xld		Enclosing rectangle parallel to the coordinate axes of contours or polygons.
smallest_rectangle2_xld		Smallest enclosing rectangle with arbitrary orientation of contours or polygons.
test_self_intersection_xld		Test XLD contours or polygons for self intersection.
test_xld_point		Test whether one or more contours or polygons enclose the given point(s).