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Re: [QuadtoneRIP] Help With Making QTR Curve

2017-02-19 by Myron Gochnauer

The L values need to be sorted before using it for linearization. I can't recall for certain, but I think the L values need to go from high to low. If that doesn't work, try the other direction! :-)

I usually copy the readings (such a you have) into a spreadsheet, delete the a and b columns (they aren't used), and then sort the L column. The sorted column can then be copied, and pasted into a clean text file. That should prevent the error message you are getting.

Myron



On Feb 18, 2017, at 6:34 PM, ian@ianbarberphotography.co.uk [QuadtoneRIP] <QuadtoneRIP@yahoogroups.com> wrote:


I am trying to make a curve but when I try to linearize it, I am seeing the following message at the end of the file


The Lab values are not in order.


Cannot be linearized.


I printed the munki-21steps.tif file and measured each step individually with the Color Munki and then exported the results L a b


I then dropped that file onto the QTR-Linearize-Data.app script which created an -out.txt file which is where I see

The Lab values are not in order.


Cannot be linearized.


Does anyone know what I may have done wrong< /p>


Column1 - L
Column 2 - a
Column 3 - b


69.170411 2.229375 4.162587 38.967692 0.820198 1.544497 91.256101 -0.203137 2.426518 57.40068 2.058672 3.321924 26.076259 0.861397 2.001437 77.814396 1.531754 4.07091 47.183377 1.147048 1.835083 17.622641 1.490708 2.165402 64.98 2.272277 3.718938 34.99938 0.856993 1.813594 87.45355 0.358367 3.219209 53.827364 1.898121 2.837888 24.797505 0.904512 1.825907 73.69646 2.017101 4.294673 43.653643 1.001303 1.58205 94.769523 -0.762756 1.728522 61.048939 2.299934 3.561152 31.022183 0.82908 2.025414 82.733287 0.98201 3.696157 50.63376 1.565484 2.500536 21.442101 1.164079 2.080707





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