QTR-Quadtone RIP

I've managed to make progress: HPR is now working for me great on the  
3000 with PiezoTone inks.

Part of my problem was probably that I was trying to use the Step-51- 
random target for linearisation, and the differences in the shadow  
areas were very slight.
After stopping and thinking about it a bit, I realised that the  
Step-21x4-random target was a better bet for the linearisation step,  
averaging out scanning errors and having larger steps.

Mind you, I've now defined a Step-51x4-random target and reference  
file which can be used for both steps:
	http://burren.cx/photo/files/step-51x4.zip
Feel free to snag a copy if you think it might be useful to you!


I'm still fine-tuning the 3000 HPR curves a little (aiming to smooth  
out the texture in the mid-tones a bit) but at least I'm moving  
forward and producing prints!

Cheers
__
David Burren