关键词: HOG（方向梯度直广图）特征, 人体行为检测, 交通领域

Abstract: This paper provides a literature survey on the fundamental and application of Histogram of Oriented Gradients（HOG）. Meanwhile, this survey elaborates the HOG and analyzes the experimental results of each literature. As is known, HOG feature is a traditional feature description method. The researchers continually improve HOG feature, to identify targets more accurately. The researchers have put forward PHOG, AW-HOG, MultiHOG and so on. The development prospect of HOG features is worth expecting for its remarkable detection results by applying it to different domains, such as human activity, transportation and other emerging fields.

Key words: HOG feature, human activity detection, transportation field