This document describe how to extract keypoints form pictures. Method used - harris affine and hessian affine

Visual categorization with bags of keypoints

一种基于最大熵和部件的物体检测方法。在人脸检测上的应用取得了很大的准确率提升。-This paper presents a probabilistic part-based approach for texture and object recognition. Textures are represented using a part dictionary found by quantizing the appearance of scale- or affine-invariant ke