Steps:
1 Representing the World with Visual Words
1.1 Creating Visual Words
1.2 Computing Visual Words
2 Building a Recognition System
2.1 Extracting Features
2.2 Comparing Windows
2.3 Building A Model of the Visual World
2.4 Quantitative Evaluation
![](/images/cppblog_com/abilitytao/hw2_2.JPG)
recognition rate is nearly 65%.