| 23:01 | bw | left the channel |
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| 23:06 | intracube | http://i.imgur.com/j23B4rt.png
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| 23:12 | troy_s | intracube: Pink is probably because the bins are pinned.
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| 23:13 | intracube | pinned?
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| 23:13 | troy_s | FUll.
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| 23:13 | troy_s | Full bins.
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| 23:13 | troy_s | Also, that thing is noisy as hell which implies that the matrix was based off of a not quite exposed chart.
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| 23:14 | intracube | I mean just the bottom right corner
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| 23:14 | intracube | it looks a bit like the false colour you sometimes get with long exposures
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| 23:16 | intracube | amp noise?
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| 23:17 | intracube | half way down: http://www.bythom.com/d80review.htm
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| 00:02 | bw | joined the channel |
| 00:15 | troy_s | intracube: That pink is almost certainly pinned bins.
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| 00:15 | troy_s | ;)
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| 00:15 | troy_s | intracube: Full wells that are failing to represent their quantities, while the other one still has data left.
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| 00:15 | troy_s | (aka non-data in that region)
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| 00:16 | intracube | hmm, but as I say it doesn't seem related to the scene lighting
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| 00:17 | intracube | troy_s: I mean, the wells might be full making it pink
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| 00:17 | intracube | the question is... why just that corner
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| 00:18 | troy_s | It's just "overexposed' there
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| 00:18 | troy_s | That's a case where a typical camera sets all wells to full if one well is pinned.
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| 00:18 | troy_s | (Again, rightfully)
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| 00:18 | troy_s | At least I think it is.
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| 00:18 | intracube | troy_s: only red and blue channels are affected
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| 00:18 | intracube | look at the green channel
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| 00:19 | intracube | not even a hint of it getting brighter in that corner
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| 00:19 | troy_s | That's probably because that image has been massaged.
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| 00:19 | troy_s | Judging from the ridiculous sensor noise etc. from the matrix.
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| 00:19 | troy_s | So the original is probably underexposed, and non-uniform.
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| 00:19 | troy_s | Then someone tried to "fix" that before profiling (which of course will adversely impact the resultant matrix as a whole)
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| 00:20 | troy_s | Pure speculation, but that's where I'll put it.
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| 00:27 | intracube | some unscientific colour meddling by me: http://i.imgur.com/HrczJ4C.png (right image)
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| 00:28 | intracube | pulling back on the corner pink and some other stuff
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| 04:46 | intracube | left the channel |
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| 05:09 | alexML | intracube: when taking the overexposed reference frame, that corner was a little darker
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| 05:16 | intracube | which reference frame was used?
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| 05:16 | intracube | alexML: ^
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| 05:18 | intracube | this one: http://files.apertus.org/AXIOM-Beta/snapshots/IT8%20Charts%20Nikon-08.01.2016/it8-gainx1-offset2047-80ms-02.raw12 ?
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| 05:22 | intracube | is looking for the HTC-gainx1-offset2047-80ms-02 version
| | 05:26 | intracube | ah, found them
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| 05:29 | intracube | wow, that's one heck of a roll-off to that image
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| 05:41 | intracube | changed nick to: intracube_afk
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| 05:54 | alexML | intracube_afk: http://files.apertus.org/AXIOM-Beta/snapshots/HCT%20Nikon-08.01.2106/
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| 05:56 | alexML | as reference frames, I used nonlinearity-gainx1-offset2047-75ms-01.raw12 and nonlinearity-gainx1-offset2047-81ms-01.raw12 as clip frames, and darkframe_gainx1_5ms_01.raw12 and darkframe_gainx1_50ms_01.raw12 as dark frames
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| 05:56 | alexML | you can create those with e.g. raw2dng darkframe*x1*.raw12 --swap-lines --calc-darkframe
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| 05:57 | alexML | or raw2dng nonlin*x1*raw12 --swap-lines --calc-clipframe
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| 05:57 | alexML | these two commands will create darkframe-x1.pgm and clipframe-x1.pgm
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| 05:58 | alexML | once you have those files in current dir, raw2dng will use them to correct all images you develop
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| 05:58 | alexML | now you can run highlight_test from here: https://github.com/apertus-open-source-cinema/misc-tools-utilities/tree/master/nonlinear-highlights
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| 05:58 | alexML | and it will give you 4 LUTs
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| 05:59 | alexML | copy those into raw2dng, recompile, then: raw2dng *80ms*.raw12 --swap-lines --fixrn --lut
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| 05:59 | alexML | and that's how you can reproduce my experiment
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| 06:39 | intracube_afk | alexML: thanks. will have a look tomorrow
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| 06:41 | Bertl_zZ | changed nick to: Bertl
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| 06:41 | Bertl | morning folks!
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| 07:16 | se6astian|away | changed nick to: se6astian
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| 07:33 | se6astian | good morning
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| 13:45 | troy_s | Looks like PWLC is landing!
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| 13:45 | troy_s | Exciting.
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| 13:52 | se6astian | it is :D
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| 14:33 | se6astian | http://files.apertus.org/AXIOM-Beta/BetaPLR1.jpg for full resolution image
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| 14:35 | troy_s | se6astian: Amazing. Looks like the UI basics are in place too eh?
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| 14:35 | troy_s | se6astian: Can't wait to see the tweaks.
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| 14:37 | se6astian | actually its a direct copy of the webgui from the alpha
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| 14:37 | se6astian | we just did the groundwork today to make it work with the beta
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| 14:37 | troy_s | se6astian: Where you mucking with the knee points for starting out?
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| 14:37 | se6astian | we played around a bit with the kneepoints
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| 14:37 | troy_s | Really??? I wasn't aware the Alpha got that far.
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| 14:38 | se6astian | but it brought us more confusion than clarification
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| 14:38 | troy_s | Oh noes. Explain?
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| 14:38 | troy_s | I take it this was yourself and Herb?
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| 14:38 | se6astian | I am sure alexML will be able to untie the gordian PLR knot :)
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| 14:39 | se6astian | yes we only had one complete alpha camera unit so sharing it was tricky
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| 14:39 | se6astian | so it was mainly herbert and my stuff on it
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| 14:39 | troy_s | What was the confusion point?
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| 14:39 | se6astian | now the Alpha is in belgium
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| 14:39 | troy_s | Something odd with the knee response?
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| 14:41 | se6astian | yes, it felt like pushing the kneepoint towards recovering overexposed areas (the glowing tungsten filament) actually clipped the darker midtones more
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| 14:41 | se6astian | I expected it to do exactly the opposite: push those areas further down on the histogram
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| 14:42 | troy_s | Hrm. Was the knee close to the photo site well saturation of the filament for example?
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| 14:43 | troy_s | Or of the "darker midtones"
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| 14:43 | troy_s | Rather.
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| 14:43 | se6astian | hard to say, we will do more scientific image series soon to test that
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| 14:43 | troy_s | (IE the hingepoint of the knee landing in the range of those midtones)
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| 14:44 | troy_s | The mojo behind the math _at_ the knees might be funny.
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| 14:44 | se6astian | I ll grab a few extreme snaps and upload them now before I leave the office
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| 14:44 | troy_s | One would expect everything _up to_ the knee to be preserved at exposure A, and everything above to be at B, but perhaps there is feathering or something.
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| 14:44 | se6astian | but dont expect any miracles :)
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| 14:44 | troy_s | I won't.
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| 14:44 | troy_s | But I find it interesting.
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| 14:45 | troy_s | When does irieger get it?
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| 14:52 | Bertl | off for a nap ... bbl
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| 14:52 | Bertl | changed nick to: Bertl_zZ
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| 14:54 | AxiomHQ | iriegers beta is configured a bit differently for high speed snaps
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| 14:54 | AxiomHQ | but I guess he should be able to use it as well
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| 14:55 | AxiomHQ | herbert has to confirm the memory issue though
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| 14:55 | AxiomHQ | upload complete
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| 14:55 | AxiomHQ | http://files.apertus.org/AXIOM-Beta/snapshots/PLRHDR/
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| 14:55 | AxiomHQ | check out: http://files.apertus.org/AXIOM-Beta/snapshots/PLRHDR/PLRHDR-Test-linear-15ms.DNG
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| 14:55 | AxiomHQ | and http://files.apertus.org/AXIOM-Beta/snapshots/PLRHDR/PLRHDR-Test-linear-1.5ms.DNG
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| 14:56 | AxiomHQ | those are PLR off images
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| 14:56 | AxiomHQ | then I tuned in these settings
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| 14:56 | AxiomHQ | http://files.apertus.org/AXIOM-Beta/snapshots/PLRHDR/PLRHDR-Test-extremePLR2-15ms.png
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| 14:56 | AxiomHQ | using 15ms and 1.5ms as exposure time components
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| 14:56 | AxiomHQ | http://files.apertus.org/AXIOM-Beta/snapshots/PLRHDR/PLRHDR-Test-extremePLR2-15ms.DNG is the result
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| 14:58 | AxiomHQ | 15ms -> 1.5ms = a bit more than 3 stops
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| 15:00 | se6astian | but you can also make the first kneepoint higher than the second one...
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| 15:00 | se6astian | so lots of things to play around
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| 15:00 | se6astian | turning off to go home now
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| 15:01 | se6astian | changed nick to: se6astian|away
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| 15:16 | troy_s | God.
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| 15:30 | se6astian|away | changed nick to: se6astian
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| 15:31 | se6astian | troy_s: have you seen the light? :)
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| 15:31 | troy_s | No. Just shut down when I realized I would have to convert formats.
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| 15:32 | troy_s | That was the awareness of the DuNG format.
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| 15:32 | troy_s | :)
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| 15:59 | aombk3 | the hdr plr mode can have 2 kneepoints max?
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| 16:04 | aombk3 | changed nick to: aombk
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| 16:08 | troy_s | aombk: Yes.
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