Daisy
Allowing Ads
- Joined
- Apr 2, 2006
- Messages
- 1
- Format
- 35mm
I'm trying to linearize the ink description file for digital negatives with Quadtone Rip. First I print out the negative of step-21X4-random stepwedge. Then I made a palladium print, measured the patches by the Eye-one,dragged the file onto QTR-Linearize-Data and got the info as below:
Step Dens Lab A B
0.00 0.086 92.57 0.04 5.04 - a b L +
5.00 0.090 92.22 0.15 5.36 - a b L +
10.00 0.099 91.52 0.29 5.64 - |a b L +
15.00 0.114 90.25 0.55 6.29 - | a Lb +
20.00 0.132 88.84 0.82 6.73 - | a L b +
25.00 0.162 86.44 1.20 7.44 - | a L b+
30.00 0.197 83.73 1.59 8.00 - | a L b
35.00 0.248 79.88 1.98 8.37 - | a L b
40.00 0.294 76.52 2.21 8.49 - | a L b
45.00 0.346 72.98 2.35 8.30 - | a L b
50.00 0.420 68.01 2.43 7.87 - | aL b
55.00 0.497 63.24 2.32 7.12 - | L a b +
60.00 0.600 57.20 1.90 5.50 - | L a b +
65.00 0.710 51.28 1.31 3.57 - L a b +
70.00 0.793 47.11 0.76 1.86 - L | a b +
75.00 0.893 42.45 0.30 0.40 - L |b +
80.00 0.974 38.95 0.01 -0.65 - L b a +
85.00 1.055 35.59 -0.17 -1.35 - L b a| +
90.00 1.115 33.28 -0.24 -1.80 - L b a| +
95.00 1.173 31.13 -0.23 -1.91 - L b a| +
100.00 1.221 29.46 -0.15 -1.77 - L b a| +
LINEARIZE="92.575 92.22 91.52 90.2525 88.8375 86.44 83.7275 79.875 76.5225 72.9775 68.01 63.2375 57.205 51.2775 47.11 42.4475 38.945 35.595 33.28 31.13 29.4575"
For Digital Negative:
LINEARIZE="29.4575 31.13 33.28 35.595 38.945 42.4475 47.11 51.2775 57.205 63.2375 68.01 72.9775 76.5225 79.875 83.7275 86.44 88.8375 90.2525 91.52 92.22 92.575"
---------------------------------
Then I pasted the line (LINEARIZE="29.4575 31.13...") to the bottom of my previous ink description file,opened QTRgui curve creation dialog, clicked on the "show curve" and got the message:
Invalid linearize curve - not constantly increasing. Curve Creation failed.
But if I pasted the LINEARIZE data not for Digital negative(LINEARIZE="92.575 92.22..." ), it could be linearized.
Then I read the instructions again and in the document of "QTR 2.7&Eye-One spectrophotometer", it reads:
The last line has the linearization info. Triple-click on it, Copy the whole line and Paste it to the bottom of the ink description file. Re-process the ink file with Drop-Quad-Profile.
Sorry to say that I couldn't even find where this "Drop-Quad-Profile" locates.
I have also try to sustitude lineazation with Gray-curve. I scanned the step-21X4-random stepwedge print,read the k value of the first line,made a correction curve for the negatives in PS, opened QTRgui "Gray Curve",browse and navigate to the location of the curve. But the result seems worse than before. For example, I got K values of 68 for the patch of 70 without the Gray-curve, but now a K value of 50. (Does it matter that the profile and the curve file hasn't be kept in the same directory?)
Really have no idea now. How can I lineaze? Any suggestions would be highly appreciated!!
Daisy
Step Dens Lab A B
0.00 0.086 92.57 0.04 5.04 - a b L +
5.00 0.090 92.22 0.15 5.36 - a b L +
10.00 0.099 91.52 0.29 5.64 - |a b L +
15.00 0.114 90.25 0.55 6.29 - | a Lb +
20.00 0.132 88.84 0.82 6.73 - | a L b +
25.00 0.162 86.44 1.20 7.44 - | a L b+
30.00 0.197 83.73 1.59 8.00 - | a L b
35.00 0.248 79.88 1.98 8.37 - | a L b
40.00 0.294 76.52 2.21 8.49 - | a L b
45.00 0.346 72.98 2.35 8.30 - | a L b
50.00 0.420 68.01 2.43 7.87 - | aL b
55.00 0.497 63.24 2.32 7.12 - | L a b +
60.00 0.600 57.20 1.90 5.50 - | L a b +
65.00 0.710 51.28 1.31 3.57 - L a b +
70.00 0.793 47.11 0.76 1.86 - L | a b +
75.00 0.893 42.45 0.30 0.40 - L |b +
80.00 0.974 38.95 0.01 -0.65 - L b a +
85.00 1.055 35.59 -0.17 -1.35 - L b a| +
90.00 1.115 33.28 -0.24 -1.80 - L b a| +
95.00 1.173 31.13 -0.23 -1.91 - L b a| +
100.00 1.221 29.46 -0.15 -1.77 - L b a| +
LINEARIZE="92.575 92.22 91.52 90.2525 88.8375 86.44 83.7275 79.875 76.5225 72.9775 68.01 63.2375 57.205 51.2775 47.11 42.4475 38.945 35.595 33.28 31.13 29.4575"
For Digital Negative:
LINEARIZE="29.4575 31.13 33.28 35.595 38.945 42.4475 47.11 51.2775 57.205 63.2375 68.01 72.9775 76.5225 79.875 83.7275 86.44 88.8375 90.2525 91.52 92.22 92.575"
---------------------------------
Then I pasted the line (LINEARIZE="29.4575 31.13...") to the bottom of my previous ink description file,opened QTRgui curve creation dialog, clicked on the "show curve" and got the message:
Invalid linearize curve - not constantly increasing. Curve Creation failed.
But if I pasted the LINEARIZE data not for Digital negative(LINEARIZE="92.575 92.22..." ), it could be linearized.
Then I read the instructions again and in the document of "QTR 2.7&Eye-One spectrophotometer", it reads:
The last line has the linearization info. Triple-click on it, Copy the whole line and Paste it to the bottom of the ink description file. Re-process the ink file with Drop-Quad-Profile.
Sorry to say that I couldn't even find where this "Drop-Quad-Profile" locates.
I have also try to sustitude lineazation with Gray-curve. I scanned the step-21X4-random stepwedge print,read the k value of the first line,made a correction curve for the negatives in PS, opened QTRgui "Gray Curve",browse and navigate to the location of the curve. But the result seems worse than before. For example, I got K values of 68 for the patch of 70 without the Gray-curve, but now a K value of 50. (Does it matter that the profile and the curve file hasn't be kept in the same directory?)
Really have no idea now. How can I lineaze? Any suggestions would be highly appreciated!!
Daisy
