org.opencv.ximgproc

Class ContourFitting

java.lang.Object

org.opencv.core.Algorithm

org.opencv.ximgproc.ContourFitting

public class ContourFitting
extends Algorithm

Class for ContourFitting algorithms. ContourFitting match two contours \( z_a \) and \( z_b \) minimizing distance \( d(z_a,z_b)=\sum (a_n - s b_n e^{j(n \alpha +\phi )})^2 \) where \( a_n \) and \( b_n \) are Fourier descriptors of \( z_a \) and \( z_b \) and s is a scaling factor and \( \phi \) is angle rotation and \( \alpha \) is starting point factor adjustement

Field Summary

Fields inherited from class org.opencv.core.Algorithm

nativeObj

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	ContourFitting(long addr)

Method Summary

Modifier and Type	Method and Description
static ContourFitting	__fromPtr__(long addr)
void	estimateTransformation(Mat src, Mat dst, Mat alphaPhiST, double[] dist) Fit two closed curves using fourier descriptors.
void	estimateTransformation(Mat src, Mat dst, Mat alphaPhiST, double[] dist, boolean fdContour) Fit two closed curves using fourier descriptors.
protected void	finalize()
int	getCtrSize()
int	getFDSize()
void	setCtrSize(int n) set number of Fourier descriptors used in estimateTransformation
void	setFDSize(int n) set number of Fourier descriptors when estimateTransformation used vector<Point>

Methods inherited from class org.opencv.core.Algorithm

clear, empty, getDefaultName, getNativeObjAddr, save

Methods inherited from class java.lang.Object

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

Constructor Detail

ContourFitting

protected ContourFitting(long addr)

Method Detail

__fromPtr__

public static ContourFitting __fromPtr__(long addr)

getCtrSize

public int getCtrSize()

Returns:

number of fourier descriptors

getFDSize

public int getFDSize()

Returns:

number of fourier descriptors used for optimal curve matching

estimateTransformation

public void estimateTransformation(Mat src,
                                   Mat dst,
                                   Mat alphaPhiST,
                                   double[] dist,
                                   boolean fdContour)

Fit two closed curves using fourier descriptors. More details in CITE: PersoonFu1977 and CITE: BergerRaghunathan1998

Parameters:

src - Contour defining first shape.

dst - Contour defining second shape (Target).

alphaPhiST - : \( \alpha \)=alphaPhiST(0,0), \( \phi \)=alphaPhiST(0,1) (in radian), s=alphaPhiST(0,2), Tx=alphaPhiST(0,3), Ty=alphaPhiST(0,4) rotation center

dist - distance between src and dst after matching.

fdContour - false then src and dst are contours and true src and dst are fourier descriptors.

estimateTransformation

public void estimateTransformation(Mat src,
                                   Mat dst,
                                   Mat alphaPhiST,
                                   double[] dist)

Fit two closed curves using fourier descriptors. More details in CITE: PersoonFu1977 and CITE: BergerRaghunathan1998

Parameters:

src - Contour defining first shape.

dst - Contour defining second shape (Target).

alphaPhiST - : \( \alpha \)=alphaPhiST(0,0), \( \phi \)=alphaPhiST(0,1) (in radian), s=alphaPhiST(0,2), Tx=alphaPhiST(0,3), Ty=alphaPhiST(0,4) rotation center

dist - distance between src and dst after matching.

setCtrSize

public void setCtrSize(int n)

set number of Fourier descriptors used in estimateTransformation

Parameters:

n - number of Fourier descriptors equal to number of contour points after resampling.

setFDSize

public void setFDSize(int n)

set number of Fourier descriptors when estimateTransformation used vector<Point>

Parameters:

n - number of fourier descriptors used for optimal curve matching.

finalize

protected void finalize()
                 throws Throwable

Overrides:

finalize in class Algorithm

Throws:

Throwable