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QTR-Quadtone RIP

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Thread

"The Lab values are not in order"

"The Lab values are not in order"

2006-05-16 by manni1234atf

Hi,

printed QTR-51-random wedge, messured with EyeOne Pro Rev b. I've done
five meassurements and used the average tool in MeasureTool afterwards.

But when trying to create a curve, I get a "Invalid linearization
curve - not constantly increasing" error. Why?

Here are my measurements: Step	Dens	Lab	A	B	
0.00	0.027	97.6	1.03	-6.58	-  b                          |   a       
               L +
2.00	0.04	96.48	1.07	-6.23	-    b                        |   a       
              L  +
4.00	0.053	95.39	1.1	-6.34	-   b                         |   a       
              L  +
6.00	0.068	94.06	1.12	-5.91	-     b                       |   a      
              L   +
8.00	0.086	92.55	1.19	-5.5	-       b                     |   a       
            L    +
10.00	0.106	90.93	1.22	-5.54	-      b                      |   a     
             L     +
12.00	0.129	89.07	1.28	-5.09	-        b                    |    a    
            L      +
14.00	0.153	87.15	1.34	-4.59	-          b                  |    a    
           L       +
16.00	0.18	85	1.39	-4.47	-           b                 |    a        
      L        +
18.00	0.208	82.86	1.44	-3.93	-             b               |    a    
        L          +
20.00	0.245	80.14	1.53	-3.28	-               b             |     a   
       L           +
22.00	0.28	77.58	1.58	-3.04	-                b            |     a    
    L             +
24.00	0.313	75.26	1.58	-2.69	-                  b          |     a   
    L              +
26.00	0.341	73.29	1.64	-2.2	-                    b        |     a    
 L                +
28.00	0.382	70.52	1.68	-1.87	-                     b       |     a   
 L                 +
30.00	0.414	68.41	1.68	-1.39	-                       b     |     a   
L                  +
32.00	0.453	65.96	1.75	-0.83	-                         b   |      a L
                   +
34.00	0.496	63.28	1.85	-0.48	-                           b |      a  
                   +
36.00	0.518	61.93	1.84	-0.37	-                           b |      a  
                   +
38.00	0.577	58.52	1.94	0.45	-                             |b   L a   
                  +
40.00	0.622	55.94	1.96	0.67	-                             | bL   a   
                  +
42.00	0.652	54.32	1.96	0.85	-                             | Lb   a   
                  +
44.00	0.675	53.11	1.98	0.97	-                             |L b   a   
                  +
46.00	0.72	50.74	2.02	1.2	-                             L   b   a    
                +
48.00	0.745	49.48	2	1.29	-                            L|    b  a     
               +
50.00	0.781	47.7	2.04	1.53	-                           L |     b a   
                 +
52.00	0.846	44.62	2.03	1.95	-                         L   |      ba  
                  +
54.00	0.871	43.44	2.01	1.91	-                         L   |      ba  
                  +
56.00	0.918	41.36	2.06	2.21	-                       L     |       b  
                  +
58.00	0.984	38.52	2.06	2.55	-                      L      |       a b
                  +
60.00	0.992	38.19	2.02	2.3	-                     L       |       ab  
                 +
62.00	1.033	36.49	2.04	2.5	-                    L        |       a b 
                 +
64.00	1.089	34.29	2.01	2.57	-                   L         |       a b
                  +
66.00	1.102	33.79	1.95	2.51	-                   L         |      a  b
                  +
68.00	1.138	32.43	2	2.63	-                  L          |       a b   
               +
70.00	1.2	30.19	1.95	2.72	-                 L           |      a  b  
                +
72.00	1.24	28.78	1.87	2.77	-                L            |      a   b
                 +
74.00	1.287	27.2	1.77	2.62	-               L             |      a  b 
                 +
76.00	1.347	25.24	1.79	2.88	-              L              |      a   b
                 +
78.00	1.36	24.85	1.73	2.53	-             L               |     a   b 
                 +
80.00	1.416	23.14	1.54	2.66	-            L                |     a   b
                  +
82.00	1.457	21.9	1.49	2.68	-            L                |    a    b 
                 +
84.00	1.473	21.44	1.37	2.46	-           L                 |    a   b 
                  +
86.00	1.492	20.9	1.33	2.35	-           L                 |    a   b  
                 +
88.00	1.524	20.02	1.28	2.56	-           L                 |    a    b
                  +
90.00	1.533	19.77	1.23	2.43	-          L                  |   a    b 
                  +
92.00	1.553	19.21	1.19	2.32	-          L                  |   a    b 
                  +
94.00	1.569	18.8	1.09	2.33	-          L                  |   a    b  
                 +
96.00	1.571	18.74	0.95	2.16	-          L                  |  a    b  
                  +
98.00	1.571	18.73	0.83	2.2	-          L                  |  a    b   
                 +
100.00	1.572	18.72	0.71	1.93	-          L                  | a    b  
                   +

LINEARIZE="97.6 96.48 95.39 94.06 92.55 90.93 89.07 87.15 85 82.86
80.14 77.58 75.26 73.29 70.52 68.41 65.96 63.28 61.93 58.52 55.94
54.32 53.11 50.74 49.48 47.7 44.62 43.44 41.36 38.52 38.19 36.49 34.29
33.79 32.43 30.19 28.78 27.2 25.24 24.85 23.14 21.9 21.44 20.9 20.02
19.77 19.21 18.8 18.74 18.73 18.72"

Re: "The Lab values are not in order"

2006-05-16 by Johnny Eades

I looks like you aren't using the random wedge but the 51 step wedge
in even increments of 2%.

Your friend in Photography,

Johnny Eades

--- In QuadtoneRIP@yahoogroups.com, "manni1234atf" <sdicamaro@...> wrote:
Show quoted textHide quoted text
>
> Hi,
> 
> printed QTR-51-random wedge, messured with EyeOne Pro Rev b. I've done
> five meassurements and used the average tool in MeasureTool afterwards.
> 
> But when trying to create a curve, I get a "Invalid linearization
> curve - not constantly increasing" error. Why?
> 
> Here are my measurements: Step	Dens	Lab	A	B	
> 0.00	0.027	97.6	1.03	-6.58	-  b                          |   a       
>                L +
> 2.00	0.04	96.48	1.07	-6.23	-    b                        |   a       
>               L  +
> 4.00	0.053	95.39	1.1	-6.34	-   b                         |   a       
>               L  +
> 6.00	0.068	94.06	1.12	-5.91	-     b                       |   a      
>               L   +
> 8.00	0.086	92.55	1.19	-5.5	-       b                     |   a       
>             L    +
> 10.00	0.106	90.93	1.22	-5.54	-      b                      |   a     
>              L     +
> 12.00	0.129	89.07	1.28	-5.09	-        b                    |    a    
>             L      +
> 14.00	0.153	87.15	1.34	-4.59	-          b                  |    a    
>            L       +
> 16.00	0.18	85	1.39	-4.47	-           b                 |    a        
>       L        +
> 18.00	0.208	82.86	1.44	-3.93	-             b               |    a    
>         L          +
> 20.00	0.245	80.14	1.53	-3.28	-               b             |     a   
>        L           +
> 22.00	0.28	77.58	1.58	-3.04	-                b            |     a    
>     L             +
> 24.00	0.313	75.26	1.58	-2.69	-                  b          |     a   
>     L              +
> 26.00	0.341	73.29	1.64	-2.2	-                    b        |     a    
>  L                +
> 28.00	0.382	70.52	1.68	-1.87	-                     b       |     a   
>  L                 +
> 30.00	0.414	68.41	1.68	-1.39	-                       b     |     a   
> L                  +
> 32.00	0.453	65.96	1.75	-0.83	-                         b   |      a L
>                    +
> 34.00	0.496	63.28	1.85	-0.48	-                           b |      a  
>                    +
> 36.00	0.518	61.93	1.84	-0.37	-                           b |      a  
>                    +
> 38.00	0.577	58.52	1.94	0.45	-                             |b   L a   
>                   +
> 40.00	0.622	55.94	1.96	0.67	-                             | bL   a   
>                   +
> 42.00	0.652	54.32	1.96	0.85	-                             | Lb   a   
>                   +
> 44.00	0.675	53.11	1.98	0.97	-                             |L b   a   
>                   +
> 46.00	0.72	50.74	2.02	1.2	-                             L   b   a    
>                 +
> 48.00	0.745	49.48	2	1.29	-                            L|    b  a     
>                +
> 50.00	0.781	47.7	2.04	1.53	-                           L |     b a   
>                  +
> 52.00	0.846	44.62	2.03	1.95	-                         L   |      ba  
>                   +
> 54.00	0.871	43.44	2.01	1.91	-                         L   |      ba  
>                   +
> 56.00	0.918	41.36	2.06	2.21	-                       L     |       b  
>                   +
> 58.00	0.984	38.52	2.06	2.55	-                      L      |       a b
>                   +
> 60.00	0.992	38.19	2.02	2.3	-                     L       |       ab  
>                  +
> 62.00	1.033	36.49	2.04	2.5	-                    L        |       a b 
>                  +
> 64.00	1.089	34.29	2.01	2.57	-                   L         |       a b
>                   +
> 66.00	1.102	33.79	1.95	2.51	-                   L         |      a  b
>                   +
> 68.00	1.138	32.43	2	2.63	-                  L          |       a b   
>                +
> 70.00	1.2	30.19	1.95	2.72	-                 L           |      a  b  
>                 +
> 72.00	1.24	28.78	1.87	2.77	-                L            |      a   b
>                  +
> 74.00	1.287	27.2	1.77	2.62	-               L             |      a  b 
>                  +
> 76.00	1.347	25.24	1.79	2.88	-              L              |      a   b
>                  +
> 78.00	1.36	24.85	1.73	2.53	-             L               |     a   b 
>                  +
> 80.00	1.416	23.14	1.54	2.66	-            L                |     a   b
>                   +
> 82.00	1.457	21.9	1.49	2.68	-            L                |    a    b 
>                  +
> 84.00	1.473	21.44	1.37	2.46	-           L                 |    a   b 
>                   +
> 86.00	1.492	20.9	1.33	2.35	-           L                 |    a   b  
>                  +
> 88.00	1.524	20.02	1.28	2.56	-           L                 |    a    b
>                   +
> 90.00	1.533	19.77	1.23	2.43	-          L                  |   a    b 
>                   +
> 92.00	1.553	19.21	1.19	2.32	-          L                  |   a    b 
>                   +
> 94.00	1.569	18.8	1.09	2.33	-          L                  |   a    b  
>                  +
> 96.00	1.571	18.74	0.95	2.16	-          L                  |  a    b  
>                   +
> 98.00	1.571	18.73	0.83	2.2	-          L                  |  a    b   
>                  +
> 100.00	1.572	18.72	0.71	1.93	-          L                  | a    b  
>                    +
> 
> LINEARIZE="97.6 96.48 95.39 94.06 92.55 90.93 89.07 87.15 85 82.86
> 80.14 77.58 75.26 73.29 70.52 68.41 65.96 63.28 61.93 58.52 55.94
> 54.32 53.11 50.74 49.48 47.7 44.62 43.44 41.36 38.52 38.19 36.49 34.29
> 33.79 32.43 30.19 28.78 27.2 25.24 24.85 23.14 21.9 21.44 20.9 20.02
> 19.77 19.21 18.8 18.74 18.73 18.72"
>

Re: [QuadtoneRIP] "The Lab values are not in order"

2006-05-16 by Howard Shaw

You can get this error message when the values are very close even 
though they don't actually go into reverse. Looking at your 96-100% 
values they are probably too close to each other for the program to 
linearise. Try to get more separation here in your unlinearised curves.

Howard

manni1234atf wrote:
Show quoted textHide quoted text
> Hi,
> 
> printed QTR-51-random wedge, messured with EyeOne Pro Rev b. I've done
> five meassurements and used the average tool in MeasureTool afterwards.
> 
> But when trying to create a curve, I get a "Invalid linearization
> curve - not constantly increasing" error. Why?
> 
> Here are my measurements: Step      Dens      Lab      A      B     
> 0.00      0.027      97.6      1.03      -6.58      -  
> b                          |   a      
>                L +
> 2.00      0.04      96.48      1.07      -6.23      -    
> b                        |   a      
>               L  +
> 4.00      0.053      95.39      1.1      -6.34      -   
> b                         |   a      
>               L  +
> 6.00      0.068      94.06      1.12      -5.91      -     
> b                       |   a     
>               L   +
> 8.00      0.086      92.55      1.19      -5.5      -       
> b                     |   a      
>             L    +
> 10.00      0.106      90.93      1.22      -5.54      -      
> b                      |   a    
>              L     +
> 12.00      0.129      89.07      1.28      -5.09      -        
> b                    |    a   
>             L      +
> 14.00      0.153      87.15      1.34      -4.59      -          
> b                  |    a   
>            L       +
> 16.00      0.18      85      1.39      -4.47      -           
> b                 |    a       
>       L        +
> 18.00      0.208      82.86      1.44      -3.93      -             
> b               |    a   
>         L          +
> 20.00      0.245      80.14      1.53      -3.28      -               
> b             |     a  
>        L           +
> 22.00      0.28      77.58      1.58      -3.04      -                
> b            |     a   
>     L             +
> 24.00      0.313      75.26      1.58      -2.69      -                  
> b          |     a  
>     L              +
> 26.00      0.341      73.29      1.64      -2.2      
> -                    b        |     a   
> L                +
> 28.00      0.382      70.52      1.68      -1.87      
> -                     b       |     a  
> L                 +
> 30.00      0.414      68.41      1.68      -1.39      
> -                       b     |     a  
> L                  +
> 32.00      0.453      65.96      1.75      -0.83      
> -                         b   |      a L
>                    +
> 34.00      0.496      63.28      1.85      -0.48      
> -                           b |      a 
>                    +
> 36.00      0.518      61.93      1.84      -0.37      
> -                           b |      a 
>                    +
> 38.00      0.577      58.52      1.94      0.45      
> -                             |b   L a  
>                   +
> 40.00      0.622      55.94      1.96      0.67      
> -                             | bL   a  
>                   +
> 42.00      0.652      54.32      1.96      0.85      
> -                             | Lb   a  
>                   +
> 44.00      0.675      53.11      1.98      0.97      
> -                             |L b   a  
>                   +
> 46.00      0.72      50.74      2.02      1.2      
> -                             L   b   a   
>                 +
> 48.00      0.745      49.48      2      1.29      
> -                            L|    b  a    
>                +
> 50.00      0.781      47.7      2.04      1.53      
> -                           L |     b a  
>                  +
> 52.00      0.846      44.62      2.03      1.95      
> -                         L   |      ba 
>                   +
> 54.00      0.871      43.44      2.01      1.91      
> -                         L   |      ba 
>                   +
> 56.00      0.918      41.36      2.06      2.21      
> -                       L     |       b 
>                   +
> 58.00      0.984      38.52      2.06      2.55      
> -                      L      |       a b
>                   +
> 60.00      0.992      38.19      2.02      2.3      
> -                     L       |       ab 
>                  +
> 62.00      1.033      36.49      2.04      2.5      -                    
> L        |       a b
>                  +
> 64.00      1.089      34.29      2.01      2.57      -                   
> L         |       a b
>                   +
> 66.00      1.102      33.79      1.95      2.51      -                   
> L         |      a  b
>                   +
> 68.00      1.138      32.43      2      2.63      -                  
> L          |       a b  
>                +
> 70.00      1.2      30.19      1.95      2.72      -                 
> L           |      a  b 
>                 +
> 72.00      1.24      28.78      1.87      2.77      -                
> L            |      a   b
>                  +
> 74.00      1.287      27.2      1.77      2.62      -               
> L             |      a  b
>                  +
> 76.00      1.347      25.24      1.79      2.88      -              
> L              |      a   b
>                  +
> 78.00      1.36      24.85      1.73      2.53      -             
> L               |     a   b
>                  +
> 80.00      1.416      23.14      1.54      2.66      -            
> L                |     a   b
>                   +
> 82.00      1.457      21.9      1.49      2.68      -            
> L                |    a    b
>                  +
> 84.00      1.473      21.44      1.37      2.46      -           
> L                 |    a   b
>                   +
> 86.00      1.492      20.9      1.33      2.35      -           
> L                 |    a   b 
>                  +
> 88.00      1.524      20.02      1.28      2.56      -           
> L                 |    a    b
>                   +
> 90.00      1.533      19.77      1.23      2.43      -          
> L                  |   a    b
>                   +
> 92.00      1.553      19.21      1.19      2.32      -          
> L                  |   a    b
>                   +
> 94.00      1.569      18.8      1.09      2.33      -          
> L                  |   a    b 
>                  +
> 96.00      1.571      18.74      0.95      2.16      -          
> L                  |  a    b 
>                   +
> 98.00      1.571      18.73      0.83      2.2      -          
> L                  |  a    b  
>                  +
> 100.00      1.572      18.72      0.71      1.93      -          
> L                  | a    b 
>                    +
> 
> LINEARIZE="97.6 96.48 95.39 94.06 92.55 90.93 89.07 87.15 85 82.86
> 80.14 77.58 75.26 73.29 70.52 68.41 65.96 63.28 61.93 58.52 55.94
> 54.32 53.11 50.74 49.48 47.7 44.62 43.44 41.36 38.52 38.19 36.49 34.29
> 33.79 32.43 30.19 28.78 27.2 25.24 24.85 23.14 21.9 21.44 20.9 20.02
> 19.77 19.21 18.8 18.74 18.73 18.72"
> 
> 
> 
> 
> 
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