Studying the burning particles in the pyrotechnic flame is important to acquire the decomposition mechanism and
spectral radiance of pyrotechnics. The high speed video (HSV) and particle image velocimetry (PIV) were used in
this paper to analyze the flow field and velocity of burning particles in the flame of pyrotechnics. The binary image
was obtained through gray scale treatment and adaptive threshold segmentation from HSV and PIV data, by which
the coordinate of each particle was marked. On the basis, the movement trajectory of each particle during
combustion was pursued by the most recent guidelines algorithm of cancroids matching. Through the method
proposed in this study, the velocity variation of each particle was obtained, the approximate distribution of particle
quantity at each zone was visualized and the mathematical model of pyrotechnic particle velocity flow field was
established.
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