[argyllcms] Re: ti1-format: creating RGB ti1-target manually?

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Alastair M. Robinson wrote:

Peter Karp wrote:
> What are the minimal fields I need to define for the ti1? I also don't
> understand the need/meaning of the XYZ values in the ti1-file which
> will define the _device_ values to read?

As I understand it, these are just a hint that the measuring program can 
use or not to detect wildly wrong values - I think that's how printread 
does its "Seem to have read strip D not strip C" trick.  I don't think 
it's used by dispread though.
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The correct XYZ values are needed to spread patches on the printer charts for 
strip measurement instrument mode, for reasonable selection of chart spacer 
colors too.
If I want to built my own test chart, I have to get XYZ from my device values 
by means of icclu and preliminary device profile. I use rather high density of 
patches, 720 patches 10x8mm for Eye One per A4 page. There is the charts with 
no spacers are needed. So the careful optimized patch spreading by printtarg 
must be done. It's impossible without XYZ data.

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