org.opencv.features2d

Class BOWTrainer

java.lang.Object

org.opencv.features2d.BOWTrainer

Direct Known Subclasses:

BOWKMeansTrainer

public class BOWTrainer
extends java.lang.Object

Abstract base class for training the *bag of visual words* vocabulary from a set of descriptors. For details, see, for example, *Visual Categorization with Bags of Keypoints* by Gabriella Csurka, Christopher R. Dance, Lixin Fan, Jutta Willamowski, Cedric Bray, 2004. :

Method Summary

Modifier and Type	Method and Description
static BOWTrainer	__fromPtr__(long addr)
void	add(Mat descriptors) Adds descriptors to a training set.
void	clear()
Mat	cluster()
Mat	cluster(Mat descriptors) Clusters train descriptors.
int	descriptorsCount() Returns the count of all descriptors stored in the training set.
java.util.List<Mat>	getDescriptors() Returns a training set of descriptors.
long	getNativeObjAddr()

Methods inherited from class java.lang.Object

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

Method Detail

__fromPtr__

public static BOWTrainer __fromPtr__(long addr)

add

public void add(Mat descriptors)

Adds descriptors to a training set.

Parameters:

descriptors - Descriptors to add to a training set. Each row of the descriptors matrix is a descriptor. The training set is clustered using clustermethod to construct the vocabulary.

clear

public void clear()

cluster

public Mat cluster()

cluster

public Mat cluster(Mat descriptors)

Clusters train descriptors.

Parameters:

descriptors - Descriptors to cluster. Each row of the descriptors matrix is a descriptor. Descriptors are not added to the inner train descriptor set. The vocabulary consists of cluster centers. So, this method returns the vocabulary. In the first variant of the method, train descriptors stored in the object are clustered. In the second variant, input descriptors are clustered.

Returns:

automatically generated

descriptorsCount

public int descriptorsCount()

Returns the count of all descriptors stored in the training set.

Returns:

automatically generated

getDescriptors

public java.util.List<Mat> getDescriptors()

Returns a training set of descriptors.

Returns:

automatically generated

getNativeObjAddr

public long getNativeObjAddr()