The invention discloses an 
image type fire 
flame identification method. The method comprises the following steps of 1, image capturing; 2, 
image processing. The 
image processing comprises the steps of 201, image preprocessing; 202, fire identifying. The fire identifying comprises the steps that indentifying is conducted by the adoption of a prebuilt 
binary classification model, the 
binary classification model is a 
support vector machine model for classifying the 
flame situation and the non-
flame situation, wherein the 
building process of the 
binary classification model comprises the steps of I, image information capturing;II, feature extracting; III, training sample acquiring; IV, binary classification 
model building; IV-1, kernel function selecting; IV-2, classification function determining, optimizing parameter C and parameter D by the adoption of the 
conjugate gradient method, converting the optimized parameter C and parameter D into gamma and sigma 2; V, binary classification model training. By means of the 
image type fire flame identification method, steps are simple, operation is simple and convenient, reliability is high, using effect is good, and the problems that reliability is lower, false or missing alarm rate is higher, using effect is poor and the like in an existing video fire detecting 
system under a complex environment are solved effectively.