Module imagingbook.common

Package imagingbook.common.geometry.fd

Class FourierDescriptorTrigonometric

java.lang.Object

imagingbook.common.geometry.fd.FourierDescriptorTrigonometric

public abstract class FourierDescriptorTrigonometric
extends Object

Defines static methods to create Fourier descriptors directly from 2D polygons without re-sampling or interpolation. See Ch. 26 of [1] for additional details.

[1] W. Burger, M.J. Burge, Digital Image Processing – An Algorithmic Introduction Using Java, 2nd ed, Springer (2016).

Version:

2022/10/24

Method Summary

Modifier and Type	Method	Description
static FourierDescriptor	from(Pnt2d[] V, int mp)	Creates a FourierDescriptor directly from the vertices of a closed polygon (without interpolation).

Methods inherited from class java.lang.Object

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

Method Details

from

public static FourierDescriptor from(Pnt2d[] V,
 int mp)

Creates a FourierDescriptor directly from the vertices of a closed polygon (without interpolation). For a given number (mp) of Fourier coefficient pairs, the resulting number of Fourier coefficients is M = 2 * mp + 1.

Parameters:

V - sequence of 2D points representing a closed polygon

mp - the number of Fourier coefficient pairs (arbitrary)

Returns:

a new FourierDescriptorTrigonometric instance