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Convert .quad file to .qidf file?

 

Hi, is there a way (utility) to recreate a .qidf file from the .quad file? Thanks.
 

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Try chat gpt. Upload it and ask it to convert the file.?

On Jan 15, 2025, at 1:47?PM, Paul Cunningham via groups.io <paul@...> wrote:

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Hi, is there a way (utility) to recreate a .qidf file from the .quad file? Thanks.
 

The short answer is no.
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There are just too many variables that do not ride along with the output quad file.
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The first problem: there is no way to "unlinearize" back to the initial partitions without the measurements being in the comments of the quad file (or not knowing if it had a gray_curve=... applied prior to linearization). And then no way to reverse engineer the gray_highlight/shadow controls because of how different papers might handle the inks loads.
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But, assuming you could do all that you _might_ be able to recalculate the gray_value= and ink limit settings.
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All the best,
Richard Boutwell

http://www.richardboutwell.com/
http://www.bwmastery.com/
 

There is a manual workaround that I have used if on a PC using the Main QTR Print Screen.
1- Put the quad file in as if going to print
2- Right click on it and you can see the quad ink curve(s) displayed
3- take down key readings from each ink curve (you may need every 5 units if lots of abrupt changes)
4- Then go to the Curve Creator and create using Curve feature on each ink if not easily produced with the other options
5- Save the qidf file and now you can adjust/tweak if needed
Hope this helps… any ideas and suggestions appreciated ?

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