The multi-projection histograms are proposed to segment the code in the line and row, and it also solves interference and conglutination problems, achieves accurate location of the number.

• 运用多投影直方图分割法对钢材区的编号进行行、列分割，并解决了干扰、字符粘连等问题，实现了编号的精确定位分割。