Methods The CDIA system was applied for measuring and observing human melasma on the right facial side by the average optical density,integral optical density and area of melasma.

• 方法应用计算机皮肤数字图像分析系统,测量正常人和黄褐斑患者右侧面部皮肤的平均吸光度、积分吸光度以及黄褐斑患者皮损面积。