RGB - LAB comparison

Full Colour (c) Phil Gee

 

 Red - Green - Blue Channels resp

 LAB - Luminance for comparison

 RRed Channel only- (c) Phil Gee  LAB- Luminance Channel only- (c) Phil Gee
 GGreen Channel only- (c) Phil Gee  LAB- Luminance Channel only- (c) Phil Gee
 BBlue Channel only- (c) Phil Gee  LAB- Luminance Channel only- (c) Phil Gee
   

 

Also check out RPS Forum for an example of the lab method

http://www.rpsforum.org/showthread.php?p=13306#post13306

 

Examples using the Calculations Technique in Photoshop will be posted shortly

 

Work In Progress