QTR-Quadtone RIP

I'm trying to figure out by myself how this works :-( 

Well I compared my values with values for other curves (those provided) and they do look different, i could blame my cheap scanner but really don't know.  Any idea?

Now I made some experimenting. If I change the value 54 (step 15) in the array for just 55, then it works.

My values: 95 94 93 91 90 88 86 84 82 80 77 74 72 64 54 46 37 25 16 6 1

The curves are still ugly, kind of "knee" in the middle, as compared with  the pretty ones provided by QTR (that is another problem), but I wondered how come that a slight change in ONE value makes the difference between "valid" and "invalid".

Help, hints, comments,  would be appreciated :-)









________________________________
From: rabanito <rabsanito@...>
To: QuadtoneRIP@yahoogroups.com
Sent: Tuesday, January 27, 2009 10:18:00 PM
Subject: [QuadtoneRIP] Linearization Fails


I'm trying to create a curve using my flatbed scanner. I did
everything as instructed, I think :-)

When at least I put the L values in the linearization array:

95 94 93 91 90 88 86 84 82 80 77 74 72 64 54 46 37 25 16 6 1

I click "show curve" and get "invalid linearize curve - not constantly
increasing"

Thanks for any help

    


      

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