Extracting Geometric Parameters of Metallography of Beads Caused by Fire with MATLAB

Metallography of beads caused by fire play an important role in determining fire mode. However, it is difficult to evaluate the Metallographic difference at present. In this paper, a computer program based on the software MATLAB was proposed to extract the geometric feature from metallography of the beads. Not only the size parameters of the beads such as the grain size, the diameters of the pores and their variance by mathematical morphological operations, but also the angle parameter of the pores arrangement has been obtained through this program. Several metallographic images of four typic fire modes were analyzed. Therefore, a reliable conclusion about the fire mode of the metallography can be drawn based on both the size and angle parameters extracted with the program mentioned above. And the application of the program will be helpful to quantitive analysis the fire conditions and mode of beads in the future.