[argyllcms] Re: how to add patch around bw axis

Thanks a lot for the answers!
I'm starting to understand how to add new patches.
But I don't want only to add gray patches (a can add these by the -g command). I want to add also same gradients near to the gray axis... something like what there is in the gretag target.

JPEG image
As you can see in the picture attached the gretag 288 patches target (at right) has tre gradient (in the RGB directions) near to the gray axis and the gretag 1100 patches target (at center) has six gradient (in the RGB CMY directions) near to the gray axis. Finally there is the PhotoActivity (an italian service) 1500 patches target that has 6 gradient stratified in 4 level for each direction... I built a tiff file with the patches like the photoactivity target and I want to add these patches in the ti1 file (882 patches) made by argyll... I have the rgb values expressed in 0-255 and I can convert these values in 0-100 scale, but how can i get the xyz values? 

thanks
Daniele

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