实现RGB值转化为Lab值，运行后用户给定RGB值，利用该程序计算机自动计算Lab值。经验证，该程序有效且简单易懂！很适合初学者。-Achieve RGB values ​ ​ into Lab values ​ ​ given by the user running the RGB values, use of the computer program automatically calculates the Lab values. Proven, ef