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QTR-Quadtone RIP

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Message

Re: Question about linearizing a QuadToneRIP Curve

2007-12-08 by Louis Dina

Andre,

I use a 21 step grayscale for linearizing, which gives me 21 L* or 
density readings.  I just copy those from the output file that Create-
ICC generates, then open the Linearization window, and use the paste 
button in QTR, below the boxes.  You don't need to fill all 60.  

There is a line at the bottom of the output file with all the density 
or L* readings in sorted order.  I don't copy the entire output file, 
just that one final line of data.  

Should work.

Lou

--- In QuadtoneRIP@yahoogroups.com, "Andre Vallejo da Silva" 
<vallejodasilva@...> wrote:
>
> Lou,I cant´t figure it out...
> The linearization window has sixty boxes. The file generated by qtr 
is
> like the one below.What bottom line do you refer to??? What shall I
> paste in those 60 boxes? And btw, when I try to install the qtr
> generated profile, Windows says it's in an invalid format...
> 
> 
> QTR-Create-ICC version 2.5.2.0
> 
> File: C:\Arquivos de
> programas\Datacolor\Spyder3Print\Data\Export\EAM_UBlack_2-out.txt
> Step    Dens    Lab    A    B   
> 0.00    0.114    90.31    -1.43    -1.30    -                       
b
>     |                       L     +
> 5.00    0.160    86.58    -1.21    -1.24    -
                        b
>    |                    L        +
> 10.00    0.203    83.27    -0.44    -1.37    -
                       b
>   a |                  L          +
> 15.00    0.240    80.51    0.29    -1.93    -                     
b  
>     |a                L           +
> 20.00    0.285    77.24    1.24    -1.98    -                     
b  
>     |   a           L             +
> 25.00    0.313    75.24    1.43    -2.32    -                   
b    
>     |    a         L              +
> 30.00    0.358    72.10    2.00    -2.44    -                   
b    
>     |       a    L                +
> 35.00    0.409    68.73    2.40    -2.65    -                  
b     
>     |        a L                  +
> 40.00    0.447    66.30    2.72    -2.98    -                 
b      
>     |        La                   +
> 45.00    0.495    63.33    3.17    -3.01    -                
b       
>     |      L    a                 +
> 50.00    0.561    59.39    3.65    -3.34    -               
b        
>     |    L        a               +
> 55.00    0.625    55.80    4.09    -3.65    -              
b         
>     |  L            a             +
> 60.00    0.695    52.07    4.52    -3.88    -             
b          
>     |L                a           +
> 65.00    0.781    47.72    4.96    -4.37    -           
b            
>   L |                  a          +
> 70.00    0.868    43.57    5.24    -4.51    -          
b             
> L   |                   a         +
> 75.00    0.969    39.12    5.26    -4.65    -          b           
L 
>     |                    a        +
> 80.00    1.089    34.29    3.91    -4.08    -            b      
L    
>     |              a              +
> 85.00    1.264    27.96    1.63    -2.76    -               L 
b      
>     |     a                       +
> 90.00    1.452    22.07    0.14    -1.65    -            L         
b 
>     a                             +
> 95.00    1.568    18.81    -0.14    -0.91    -          
L            
>  b  a|                             +
> 100.00    1.656    16.54    0.72    -0.32    -        
L              
>    b | a                           +
> 
> Created ICC file C:\Arquivos de
> programas\Datacolor\Spyder3Print\Data\Export\EAM_UBlack_2.icc
> 
> 
> 
> 
> Posted by: "Louis Dina" lou@...   ldina
> Fri Dec 7, 2007 7:51 pm (PST)
> Scott,
> 
> First, read a test print (21 step grayscale) printed with you
> UNlinearized file, and save it as a text file. When you drag this
> text file with the 21 step readings to Create-ICC, a new text file
> should be created and it will open up on your screen (at least it
> does on Windows). At the bottom, it should show you a line with all
> 21 steps sorted in ascending or descending order. Highlight this
> entire line with your mouse and copy it (Control-C on the PC). Then
> go to the linearization tab in the Curve Creation module of QTR and
> click the paste button. These sorted numbers should be pasted into
> the linearization window. Then save the profile. You just
> linearized your file if you did everything correctly.
> 
> Lou
>

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