rgb2lab() Converte de RGB image to para LAB, a LAB2RGB Convert an image from CIELAB to RGB.

本程序通过matlab实现图片的RGB域到LAB域的转换，本程序包含测试程序，可以完全跑通，敬请放心使用。-This procedure achieved by matlab image RGB domain to the domain of LAB, this program includes testing procedures, can be completely run through, please rest assured that use.