Struct Ellipse 

pub struct Ellipse {
    pub cx: f64,
    pub cy: f64,
    pub a: f64,
    pub b: f64,
    pub angle: f64,
}

Geometric ellipse parameters fitted to a ring marker boundary.

Produced by the Fitzgibbon direct ellipse fit with RANSAC. Each detected marker has an outer ellipse (always present) and optionally an inner ellipse.

The coordinate frame depends on the detection mode:

• Without a PixelMapper: image pixel coordinates.
• With a PixelMapper: working-frame (undistorted) coordinates.

Fields

cx: f64

Center x coordinate (pixels).

cy: f64

Center y coordinate (pixels).

a: f64

Semi-major axis length (pixels, always ≥ b).

b: f64

Semi-minor axis length (pixels).

angle: f64

Rotation angle of the major axis from +x, in radians (−π/2, π/2].

Implementations

impl Ellipse

pub fn mean_axis(&self) -> f64

pub fn center(&self) -> [f64; 2]

impl Ellipse

pub fn is_valid(&self) -> bool

Check basic validity: positive semi-axes, finite values.

pub fn aspect_ratio(&self) -> f64

Aspect ratio a/b (always >= 1 when canonicalized).

pub fn to_conic(self) -> ConicCoeffs

Convert back to conic coefficients.

pub fn sample_points(&self, n: usize) -> Vec<[f64; 2]>

Sample n points on the ellipse boundary.

pub fn sampson_distance(&self, x: f64, y: f64) -> f64

Approximate geometric distance from a point to the ellipse boundary. Uses the algebraic distance divided by the gradient magnitude as a first-order approximation (Sampson distance).

Trait Implementations

impl Clone for Ellipse

fn clone(&self) -> Ellipse

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Ellipse

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Ellipse

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for Ellipse

fn eq(&self, other: &Ellipse) -> 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 Serialize for Ellipse

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Copy for Ellipse

impl StructuralPartialEq for Ellipse