Digital BW, The Print

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "John Houghton" 
<j.houghton@n...> wrote:
> 
> Measuring the greyscale patches for IJC is perfectly 
straightforward. 
> You can use the measure tool in ProfileMaker Pro V4 - no dongle 
> license required to run it.  This is downloadable from the GM 
site.  
> (The measure tool in V5 cannot be used without the PM V5 license).  
I 
> have done this myself to generate a linearized custom profile for 
> Ilford Smooth Pearl on 2100 that works extremely well.  It took me 
a 
> day, with no previous experience of IJC/OPM.  It's hard to justify 
> the cost of an Eye-One Photo, but I have never regretted buying 
mine 
> for a moment.

Hi John

Thanks for the info. I have downloaded PM4. I have read Roy's readme 
on using measure tool to linearize QTR curves. To use the Measure 
Tool I see that you have to create a ReferenceMT.txt file of the grey 
scale tiff that you want to scan. For QTR Roy supplies these.

Question: How do I create this reference file for IJC 26 step grey 
scale file ?

Peter.