Package org.opencv.features2d

Class BOWTrainer

  • Direct Known Subclasses:
    BOWKMeansTrainer
    public class BOWTrainer
extends 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. :

    • Field Detail

      • nativeObj

        protected final long nativeObj

    • Constructor Detail

      • BOWTrainer

        protected BOWTrainer​(long addr)

    • Method Detail

      • getNativeObjAddr

        public long getNativeObjAddr()

      • __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.

      • getDescriptors

        public List<Mat> getDescriptors()
        Returns a training set of descriptors.
        Returns:
        automatically generated

      • descriptorsCount

        public int descriptorsCount()
        Returns the count of all descriptors stored in the training set.
        Returns:
        automatically generated

      • 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