Patent ID: 7868772

Claim:
A flame detecting method, comprising steps of: capturing a plurality of images of a monitored area, wherein the plurality of images are recorded images of the monitored area at different time and comprise a first image in a first capture time and a second image in a second capture time; determining whether a moving area image exists in the plurality of images; analyzing a color model of the moving area image to generate a first analyzed result and comparing the first analyzed result with a first feature of a reference flame image, wherein the color model applies at least one of a three-dimensional RGB Gaussian mixture model and a three-dimensional YUV Gaussian mixture model; analyzing a location of the moving area image to generate a third analyzed result and comparing the third analyzed result with a first predetermined threshold, wherein the analyzing and comparing steps comprise steps of: analyzing and determining a first extent a centroid location of the moving area image varies with time by using an object tracking algorithm; and determining the moving area image is not a flame image when the first extent exceeds a first predetermined range, which is defined as: ∥( Xt+ 1 ,Yt+ 1)−( Xt,Yt )|< TH 1, wherein (Xt,Yt) is the centroid location of the moving area image in the first capture time, (Xt+1,Yt+1) is the centroid location of the moving area image in the second capture time, and TH 1 is a predetermined value; and determining whether the moving area image is a flame image based on results of the comparing step.