Bullet Engraving Automated Comparison Optimization Method Based on Second Moment Invariant

Abstract In the research of bullet engraving comparison method at home and abroad, the traditional method is through visual observation by microscope, comparing line-type engraving of two bullets to distinct whether the line match, which is inefficient and having big error. In this paper we proposed method based on moment invariant to identify the bullet engraving, which eliminate the actual measurement error (translation error and rotation error). Finally we get the high performance result of bullet engraving identifying based on second moment invariant.