基于貝葉斯推理的行人數(shù)量視頻檢測方法研究
[Abstract]:In this paper, the pedestrian number detection problem is studied. In the fixed scene, the pedestrian image is divided into the pedestrian front area, and the prior knowledge and a few samples of the pedestrian front scenic spot are obtained. Bayesian planning method is used to infer the number of pedestrians in the former scenic spots, and the number of pedestrians in the former scenic spots is counted to get the number of pedestrians in the images. The main contents are as follows: 1) in the process of pedestrian front scenic spot segmentation, the background model is first used for over-segmentation. In order to reduce the influence of over-segmentation into the pedestrian front scenic spot, the fast merging method of K-adjacent area is used to carry out the detailed segmentation. The feature extraction of pedestrian foreground area is carried out, and the influence of perspective deformation on feature extraction is considered, and the perspective transformation matrix is generated by self-calibration method based on fixed target. The influence of perspective deformation on feature extraction is eliminated. The entropy features and the regional covariance features of the pedestrian front scenic spot are calculated. These features are independent of the size of the pedestrian front scenic spot, and are based on the "basis" feature .3 of the content difference of the former scenic spot. To obtain the prior knowledge that the area of pedestrian front scenic area will increase with the increase of pedestrian number, a Bayesian network is established according to the characteristics of pedestrian front scenic area to infer the number of pedestrians, and a few samples of front pedestrian scenic spot are used to establish a pedestrian number detection model. In the experiment part, according to the Bayesian planning method, the number of pedestrians in the former scenic spot is deduced, and a small number of sample learning models are used to obtain a higher accuracy in the test. The pedestrian quantity detection model proposed in this study can detect the number of pedestrians waiting for crossing the street, optimize the traffic signal timing of pedestrian crossing, and can be used to obtain the number of passengers waiting at the bus stop in real time. It can detect the number of people at the entrance and exit of large public places and provide decision for the evacuation of public transportation.
【學(xué)位授予單位】:吉林大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2017
【分類號】:TP391.41;TP18
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