Passive human body positioning method and system based on infrared thermal imaging

The invention provides a passive human body positioning method and system based on infrared thermal imaging, and belongs to the field of infrared human body localization, and the method comprises the steps: carrying out the clustering through employing DBSCAN according to the temperature value and horizontal and vertical coordinate values of each pixel point in a to-be-measured heat map collected by an infrared thermal imager, and calculating the clustering type of each pixel point in the to-be-measured heat map; wherein the clustering categories comprise background clustering and human body clustering; comparing the category of each pixel point and the category of adjacent pixel points in the to-be-measured heat map to obtain the contour points of the inner edge of the human body; comparing the curvature of the human body inner edge contour point with a preset threshold value, and extracting a human body head bounding box in the to-be-measured heat map; and based on the characteristic parameters of the human