Automatic detection method and system for intensity of passenger flow based on video image

The invention provides a method for checking dense passenger flow intensity based on video image which belongs to a computer visual technique field. The invention uses a video collecting device and a processing algorithm. A video image collecting device collects monitor video image through CCTV, usually collects video image of passenger out-in flow by using a camera put on top of out-in port in passenger flow chunnel in time. The processor processes collected video image using computer visual algorithm, when passenger flow intensity is low, pixels statistics with less algorithm amount but veracious is used, and information of time shaft is used for generating background; when passenger flow intensity is high, passenger image is processed multi-angle analysis using wavelet packets decomposition, then box-counting dimension of wavelet packets decomposition coefficient matrix is extracted as characteristic for sending to classifier and obtaining passenger intensity grade, reaches aims at checking dense passenger flow intensity in real time.