georegression.fitting.ellipse

Class ClosestPointEllipseAngle_F32

java.lang.Object

georegression.fitting.ellipse.ClosestPointEllipseAngle_F32

public class ClosestPointEllipseAngle_F32
extends java.lang.Object

Finds the closest point on an ellipse to a point. Point is first put into the ellipse's coordinate system. Then newton's method is used to find the solution. The following parameterization is used: (x,y) = a*cos(t) + b*sin(t). For the center a point is arbitrarily selected.

Constructor Summary

Constructors

Constructor and Description
ClosestPointEllipseAngle_F32(float tol, int maxIterations) Specifies convergence criteria

Method Summary

Modifier and Type	Method and Description
Point2D_F32	getClosest()
float	getTheta()
void	process(Point2D_F32 point) Find the closest point on the ellipse to the specified point.
void	setEllipse(EllipseRotated_F32 ellipse) Specifies the ellipse which point distance is going to be found from

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ClosestPointEllipseAngle_F32

public ClosestPointEllipseAngle_F32(float tol,
                                    int maxIterations)

Specifies convergence criteria

Parameters:

tol - Convergence tolerance. Try 1e-8

maxIterations - Maximum number of iterations. Try 100

Method Detail

setEllipse

public void setEllipse(EllipseRotated_F32 ellipse)

Specifies the ellipse which point distance is going to be found from

Parameters:

ellipse - Ellipse description

process

public void process(Point2D_F32 point)

Find the closest point on the ellipse to the specified point. To get the solution call getClosest()

Parameters:

point - Point which it is being fit to

getClosest

public Point2D_F32 getClosest()

getTheta

public float getTheta()