基于似物性和空时协方差特征的行人检测算法

针对行人检测算法中缺少空时信息融合、检测区域过大等问题,提出了一种联合似物性检测和基于通道协方差信息的改进算法。该算法首先对图像进行二进制梯度归一化的似物性检测,并形成行人检测候选区域,缩小检测区域；然后提取待测目标的空间和时间特征；最后基于协方差信息构造一种融合空时特征的检测器,以提高检测精度。在公开的数据集INRIA和Caltech上的实验结果表明:该算法的性能优于目前主流的行人检测算法。

Pedestrian Detection Based on Objectness and Sapce-Time Covariance Features

In order to solve the fusion of space-time information and excessive detection area in pedestrian detection,a pedestrian detection method was proposed based on objectness and space-time covariance features.Firstly,binarized normed gradients algorithm is used for a test image to get objectness evaluations,and a pedestrian detection candidate area is formed.Secondly,the spatial and temporal features are extracted.Finally,a space-time detector based on cova-riance information was proposed to improve the accuracy.Experimental results on the INRIA and Caltech demonstrate that the proposed method outperforms the state-of-art pedestrian detectors in accuracy.