The 3,4-dihydroxyphenylalanine reaction was used to determine melanocyte content, and a semiautomatic image analysis system calculated the percentage of repigmentation.

• 3.；4-羟基苯丙胺酸反应用以测定黑色素细胞内容，并以半自动影像分析系统计算再色素沉淀的百分比。