Tunnel fire identification method and device

The invention discloses a tunnel fire identification method and device, and relates to the technical field of fire identification, and the method comprises the steps: obtaining a real-time RGB monitoring image, and carrying out the color space transformation of the RGB monitoring image, and obtaining an HSV monitoring image; taking the RGB monitoring image and the HSV monitoring image as input of a constructed asymmetric double-branch fire recognition model, and outputting a prediction result of whether a fire occurs or not by the asymmetric double-branch fire recognition model according to the RGB monitoring image and the HSV monitoring image; wherein the asymmetric double-branch fire identification model comprises a first branch network and a second branch network, the first branch network performs flame significant feature extraction on the RGB monitoring image and then outputs a first feature map, and the second branch network performs flame detail feature extraction on the HSV monitoring image and then o