学习opencv的一本经典英文教材，内容清晰，需要者自行下载，主要章节有：
1. Overview
2. Introduction to OpenCV
3. Getting to Know OpenCV
4、HighGUI
5. Image Processing
6. Image Transforms
7. Histograms and Matching
8. Contours
9. Image Parts and Segmentation
10. Tracking and Motion
11. Camera Models and Calibration
12. Projection and 3D Vision
13. Machine Learning
