Probability Estimation for People Detection

Qingjie
Sun

Key Lab. of Computer Science

Institute of Software, CAS

Beijing 100080, China

Enhua Wu

Faculty of Science and Technology

University of Macau, Macau

**Keywords**

people detection, image
segmentation ,rectangle fitting, probability estimation

**Abstract**

This paper presents a probability method for detecting people in a
static image.** **We simplify people as a torso and four limbs. The torso is
fitted by a quadrangle, and each limb is fitted by one or two quadrangles
depending on its pose. In order to find people, we should try to find a
combination of quadrangles that must satisfy some geometric and topological
constrains. Firstly, we try to detect and fit rectangle regions in the image,
then we search some combinations of rectangles under certain constrains. After
we get a combination, we calculate its probability of being people. If the
probability is above threshold, we adjust the vertexes of rectangles so as to
get a compact people model.