Aiming at the problem that the actual length of micro-graph is difficult to be measured because of different objective lens with different amplified times in analyzing metallographic, the marking picture system is developed with C++ Builder in this paper.

• 针对金相分析时，不同物镜下得到的不同放大倍数显微图片无法定量评估其实际长度的问题，使用C++ Builder开发了一套图片定标系统。