How to convert RGB to CIE lab

Picture is convert from RGB to CIE Lab

So I have a problem of connecting ( from pic)

Help Me please .

Thk so mush
http://www.labviewthai.com/bbs/data/attachment/forum/201102/26/2015307r8r3rlligqsrg88.jpg

The output of the IMAQ ExtractColorPlanes function is an IMAQ Image. The IMAQ RGBtoColor function you’re trying to use wants a single RGB value. You’re trying to feed a whole picture into a conversion that expects a pixel.

What’s your goal? There’s probably an established way to get there.

thk so much

It done!:smiley: