Abstract: The basic characteristics of flames were analyzed, and several representative flame characteristics were selected as criteria to identify and extract flame areas in the fire field image. Based on the luminance characteristics of flame, the suspended flame area was divided by region growing method. According to the corresponding relation of RGB and HIS color model, and by separating the R, G, B component of flame pixels, the color distribution rules of flame were verified. The interfere of regular light source was excluded by roundness criterion.

Key words: flame recognition, flame color characteristics, region growing method, segmentation of suspected flame regions, flame shape characteristics