| OpenCV 3.4.3 Open Source Computer Vision

Classes
Object Categorization
2D Features Framework

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

## Detailed Description

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

Note
  - A complete Bag-Of-Words sample can be found at opencv_source_code/samples/cpp/bagofwords_classification.cpp
    - (Python) An example using the features2D framework to perform object categorization can be found at opencv_source_code/samples/python/find_obj.py