Alkali metal concentration distribution detection method and system based on flame image processing

The invention provides an alkali metal concentration distribution detection method and system based on flame image processing. The method comprises the following steps: (1) flame spontaneous radiation intensity signal detection; (2) temperature and emissivity distribution calculation; (3) separating alkali metal spectral line intensity signals; and (4) alkali metal concentration distribution calculation. According to the characteristics of alkali metal emission spectrum in flame and wide-band imaging of an image sensor, an alkali metal intensity separation technology suitable for a color flame image is correspondingly designed, and two-dimensional distribution of alkali metal concentration in flame can be directly calculated by processing the flame image; equipment such as a spectrograph does not need to be used for additional correction, the problem that two-dimensional detection of the alkali metal concentration is difficult to realize by an existing detection method is effectively solved, and the method ha