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.

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.

Methods inherited from class org.opencv.core.Algorithm

clear, empty, getDefaultName, getNativeObjAddr, save

Methods inherited from class java.lang.Object

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

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.