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# OpenCV User Guide

- Operations with images
  - Input/Output
  - Basic operations with images
- Features2d
  - Detectors
  - Descriptors
  - Matching keypoints
- HighGUI
  - Using Kinect and other OpenNI compatible depth sensors
- Cascade Classifier Training
  - Introduction
  - Training data preparation
  - Cascade Training
- HighGUI
  - Using Creative Senz3D and other Intel Perceptual Computing SDK compatible depth sensors

## Help and Feedback

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- Ask a question on the Q&A forum.
- If you think something is missing or wrong in the documentation, please file a bug report.

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