Package org.opencv.video

Class SparseOpticalFlow

java.lang.Object

org.opencv.core.Algorithm

org.opencv.video.SparseOpticalFlow

Direct Known Subclasses:

SparsePyrLKOpticalFlow

public class SparseOpticalFlow
extends Algorithm

Base interface for sparse optical flow algorithms.

Field Summary

Fields inherited from class org.opencv.core.Algorithm

nativeObj

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	SparseOpticalFlow(long addr)

Method Summary

Modifier and Type	Method	Description
static SparseOpticalFlow	__fromPtr__(long addr)
void	calc(Mat prevImg, Mat nextImg, Mat prevPts, Mat nextPts, Mat status)	Calculates a sparse optical flow.
void	calc(Mat prevImg, Mat nextImg, Mat prevPts, Mat nextPts, Mat status, Mat err)	Calculates a sparse optical flow.
protected void	finalize()

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 Details

SparseOpticalFlow

protected SparseOpticalFlow(long addr)

Method Details

__fromPtr__

public static SparseOpticalFlow __fromPtr__(long addr)

calc

public void calc(Mat prevImg, Mat nextImg, Mat prevPts, Mat nextPts, Mat status, Mat err)

Calculates a sparse optical flow.

Parameters:

prevImg - First input image.

nextImg - Second input image of the same size and the same type as prevImg.

prevPts - Vector of 2D points for which the flow needs to be found.

nextPts - Output vector of 2D points containing the calculated new positions of input features in the second image.

status - Output status vector. Each element of the vector is set to 1 if the flow for the corresponding features has been found. Otherwise, it is set to 0.

err - Optional output vector that contains error response for each point (inverse confidence).

calc

public void calc(Mat prevImg, Mat nextImg, Mat prevPts, Mat nextPts, Mat status)

Calculates a sparse optical flow.

Parameters:

prevImg - First input image.

nextImg - Second input image of the same size and the same type as prevImg.

prevPts - Vector of 2D points for which the flow needs to be found.

nextPts - Output vector of 2D points containing the calculated new positions of input features in the second image.

status - Output status vector. Each element of the vector is set to 1 if the flow for the corresponding features has been found. Otherwise, it is set to 0.

finalize

protected void finalize() throws Throwable

Overrides:

finalize in class Algorithm

Throws:

Throwable