Struct Contour 

pub struct Contour {
    pub points: Vec<Point<usize>>,
}

Represents a contour outline as a list of points.

Fields

points: Vec<Point<usize>>

Implementations

impl Contour

pub fn arc_length(&self, closed: bool) -> f64

Computes the perimeter/length of a contour.

pub fn contour_area(&self) -> f64

Returns the area of the contour region.

pub fn approx_poly_dp(&self, epsilon: f64, closed: bool) -> Self

Approximates a polygonal curve using the Douglas-Peucker algorithm.

pub fn bounding_rect(&self) -> Rect<usize>

Computes the straight bounding rectangle of the contour.

pub fn min_area_rect(&self) -> (Point<f64>, Size<f64>, f64)

Finds the minimum area bounding box (center, size, and rotation angle in degrees).

pub fn point_polygon_test(&self, pt: Point<f64>, measure_dist: bool) -> f64

Checks if a point is inside, outside, or on the boundary of the contour. Returns:

• Positive distance if inside.
• Negative distance if outside.
• Zero if on the edge.

impl Contour

pub fn new(points: Vec<Point<usize>>) -> Self

Creates a new Contour with given points.

pub fn convexity_defects( contour: &[Point<f64>], hull: &[Point<f64>], ) -> Vec<ConvexityDefect>

Finds convexity defects between a contour and its convex hull.

A convexity defect is a region where the contour deviates inward from its convex hull. For each defect we record the start point (hull vertex), end point (next hull vertex), the farthest contour point from the hull edge, and the perpendicular depth of that point.

pub fn convex_hull(&self) -> Self

Computes the convex hull of the contour using Andrew’s Monotone Chain algorithm.

pub fn moments(&self) -> Moments

Computes the polygon moments using the Shoelace formula and Green’s Theorem.

Trait Implementations

impl Clone for Contour

fn clone(&self) -> Contour

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Contour

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for Contour

fn default() -> Contour

Returns the “default value” for a type.

impl PartialEq for Contour

fn eq(&self, other: &Contour) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for Contour