Abstract: Taking a large warehouse fire accident investigation as an example, this article introduces the application of multi-point surveillance videos analysis in fire process reconstruction. The videos containing valid information are screened out through primary screening of the points, and the time error between points is eliminated through relative time calibration. Then the ignition time is determined according to the comprehensive analysis of video images of each point, and the ignition area and fire behavior are determined based on the cross-location and mutual confirmation of the light and shadow at each point, thus reconstructing the fire process. On this basis, the precautions for extracting multi-point surveillance videos in fire investigation are analyzed, and the principles and methods of multi-point surveillance videos analysis are summarized.

Key words: multi-point, videos analysis, ignition time, ignition area, fire process reconstruction