Module imagingbook.common

Package imagingbook.common.geometry.mappings.nonlinear

Class LogPolarMapping2

java.lang.Object

imagingbook.common.geometry.mappings.nonlinear.LogPolarMapping2

All Implemented Interfaces:

Inversion, Mapping2D, Cloneable

public class LogPolarMapping2
extends Object
implements Mapping2D, Inversion

This class implements a 2D log-polar mapping transformation. Improved version (Version 2), maps radius [rmin,rmax] to [0,nr]). See Sec. 21.1.6 (Eq 21.71 - 21.74, Alg. 21.1) of [1] for additional details and examples.

[1] W. Burger, M.J. Burge, Digital Image Processing – An Algorithmic Introduction, 3rd ed, Springer (2022).

Version:

2022/11/16

Constructor Summary

Constructors

Constructor	Description
LogPolarMapping2(double xc, double yc, int P, int Q, double rmax, double rmin)	Constructor.

Method Summary

Modifier and Type	Method	Description
Pnt2d	applyTo(Pnt2d xy)	Applies this mapping to a single 2D point.
Mapping2D	getInverse()	Returns the inverse of this mapping.

Methods inherited from class java.lang.Object

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

Methods inherited from interface imagingbook.common.geometry.mappings.Mapping2D

applyTo

Constructor Details

LogPolarMapping2

public LogPolarMapping2(double xc,
 double yc,
 int P,
 int Q,
 double rmax,
 double rmin)

Constructor.

Parameters:

xc - x-coordinate of center point in source image

yc - y-coordinate of center point in source image

P - number of radial steps

Q - number of angular steps

rmax - maximum radius

rmin - minimum radius

Method Details

applyTo

public Pnt2d applyTo(Pnt2d xy)

Description copied from interface: Mapping2D

Applies this mapping to a single 2D point.

Specified by:

applyTo in interface Mapping2D

Parameters:

xy - the original point

Returns:

the transformed point

getInverse

public Mapping2D getInverse()

Description copied from interface: Inversion

Returns the inverse of this mapping.

Specified by:

getInverse in interface Inversion

Returns:

the inverse mapping