A Method of Acquiring the Spatial Position of Crowds in Video

Abstract

The invention proposes a method for obtaining the spatial position of crowds in a video, which belongs to the technical field of urban space analysis. The method first obtains the space video to be analyzed, and extracts the corresponding image; uses the convolutional neural network model to detect the target of each image; retains the target recognition frame of the human in the target detection result, and uses the geometric algorithm to convert each image The position of the people in the video is restored to the coordinates in the plan view or the top view, and the spatial position information of the crowd in the video is obtained. The invention has the advantage of being able to quickly and accurately acquire the actual geographic location information of the crowd, and has good application prospects in urban space analysis, urban and rural planning evaluation and the like.

Description

technical field [0001] The invention belongs to the technical field of urban space analysis, and particularly proposes a method for obtaining the spatial position of crowds in a video. Background technique [0002] The continuous development of information technology provides conditions for large-scale data processing, especially in recent years, the development of deep learning technology has greatly promoted the research in the field of computer vision, making the data obtained from common video recording equipment, such as photos, videos Wait, there are new analytical tools. Video images contain very rich environmental characteristics and crowd behavior information. Using video to analyze crowd behavior can help us understand crowd behavior characteristics more intuitively. If the spatial location of the crowd in the video can be obtained, the accuracy and efficiency of urban spatial analysis will be greatly improved. [0003] The existing method of obtaining crowd info...

AI Technical Summary

Problems solved by technology

Therefore, there will be a large error in obtaining the crowd position using this method

However, the crowd information required for spatial planning and design is based on the geographic coordinate system or projected coordinate system. It is impossible to obtain the exact position of the crowd in the image or video in space, which will make it difficult for the crowd information in the video to be used to support related work.

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