Skin detection in the CIELab and HSV color space

I've seen CIELab and HSV suggested a few times here on 开发者_C百科stackoverflow, but I haven't been able to find any values corresponding to skin. What are good values to look for when doing skin detection in the CIELab and HSV color spaces?

For example in RGB I've seen this:

R > 95 AND G > 40 AND B > 20 AND
max{R, G, B} – min{R, G, B} >15 AND
|R – G| > 15 AND
R > G AND R > B
OR
R > 220 AND G > 210 AND B > 170 AND
|R – G| <= 15 AND
R > B AND G > B

Are there similar expressions for CIELab and HSV?

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You could just measure it

Now if there was only a large set of images with large areas of flesh tones available on the internet?

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Some of my bookmarks on the subject:

Human Body Tracking by Adaptive Background Models and Mean-Shift Analysis

Adaptive Skin Color Classificator

http://www.codeproject.com/KB/audio-video/face_detection.aspx

http://www.codeproject.com/KB/graphics/RedMatterLibrary.aspx