In this chapter, we will cover the following recipes:
- Operating on images using OpenCV-Python
 - Detecting edges
 - Histogram equalization
 - Detecting corners
 - Detecting SIFT feature points
 - Building a Star feature detector
 - Creating features using Visual Codebook and vector quantization
 - Training an image classifier using Extremely Random Forests
 - Building an object recognizer
 - Using LightGBM for image classification