将数字图像处理(DIP)技术用于汞546.1nm谱线塞曼分裂横效应π谱线、σ谱线的图像处理,建立了CCD实时测量系统。通过多图像平均,图像细化,取样分析,快速方便地测量计算了电子的荷质比。结果表明,直接测量无法分辨的σ谱线可以通过数字图像处理测量;测量π谱线引起的相对误差小于1%,比直接测量法降低了近一个数量级。 The digital image processing (DIP) technique was applied to the image processing of mercury 546.1nm spectral Zeeman splitting cross-effect π-line and σ-line, and a real-time CCD measurement system was established. By multi-image averaging, image refinement, sampling analysis, fast and easy measurement and calculation of the charge-mass ratio of electrons. The results show that the direct measurement of the indistinguishable σ line can be measured by digital image processing. The relative error caused by the measurement of π line is less than 1%, which is nearly one order of magnitude lower than the direct measurement.