| OpenCV 5.0.0alpha Open Source Computer Vision

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Classes
Object Categorization
Extra 2D Features Framework

## Detailed Description

This section describes approaches based on local 2D features and used to categorize objects.

## Classes
class | cv::xfeatures2d::BOWImgDescriptorExtractor
| Class to compute an image descriptor using the bag of visual words. More...
class | cv::xfeatures2d::BOWKMeansTrainer
| kmeans -based class to train visual vocabulary using the bag of visual words approach. : More...
class | cv::xfeatures2d::BOWTrainer
| Abstract base class for training the bag of visual words vocabulary from a set of descriptors. More...