Synth-DIY Yahoo! Groups Archives

Its definitely averaging the measurement data. I don't know how how it knows what order they are in, especially when they are in the 21x4 random order but it works all the time, and with any format the measurement files are in—even if the location data isn't included in the measurement file, like the color port or spyderprint measurement files (I suspect it is some regular expression voodoo). I tested real quick with measurement of a single pass of a 21 step target and three passes of the same target (defining the chart structure as 3-rows 21-columns) and then ran the resulting files through QTR-linearize-datah. Here are the linearize= strings: The first one is just the two decimal place single reading and the second one shows the division by three (repeated 3s... and repeated 6s).

21x1:

LINEARIZE="98.33 94.25 90.31 86.27 82.19 78.36 74.29 70.25 66.08 62.28 58.03 53.99 50.02 45.92 42.07 37.65 33.62 29.5 25.71 21.55 17.8"

21x3:

LINEARIZE="98.3866666666667 94.2433333333333 90.32 86.3133333333333 82.2333333333333 78.39 74.2833333333333 70.2533333333333 66.11 62.2766666666667 58.0533333333333 53.95 49.9666666666667 45.8766666666667 42.05 37.5866666666667 33.5666666666667 29.4266666666667 25.68 21.5 17.72

Outside of the 51x3 target I use for relinearizing with my own system, I don't generally measure things three times because you get those long sets of repeated threes and sixes when dividing by three. it is easy enough the measure the 21 step target one more time, but measuring three additional rows to get to 51x4 can add up overtime (plus I would need to reformat a bunch of my own stuff that already uses the 51x3 charts.

Richard Boutwell

QTR-Quadtone RIP

Re: Does the I1Pro and the i1 Profiler handle multiple readings?

Attachments

Move to quarantaine