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| 04:20 | Bertl | off to bed now ... have a good one everyone!
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| 04:41 | se6astian | good early morning
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| 10:17 | niemand | Hi all! Have you thought of presenting the project at the linuxwochen vienna in may? http://linuxwochen.at/
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| 10:21 | Bertl | morning folks!
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| 10:21 | Bertl | niemand: not really, but it might make sense, thanks for the suggestion
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| 10:26 | niemand | it does perfectly fit to the focused topics (open software and hardware), you can reach a quite big local audience. I would really appreciate if you could show up there :)
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| 10:36 | se6astian | hi niemand, I presented the project at the linux wochen 2 years ago if I remember correctly
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| 10:36 | se6astian | would be a good idea to do an update
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| 10:37 | se6astian | and at the linux wochen linz 3 years ago
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| 11:15 | Bertl | niemand: do you have a good contact to the event orginization? Might simplify the procedure for us.
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| 11:16 | niemand | yes, I do :)
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| 11:17 | Bertl | excellent then!
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| 11:17 | niemand | that means i'm not in the official core team. But i'm helping them where possible and i meet them regularly, next time on next friday
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| 11:18 | Bertl | btw, I see you know tuxlover? :)
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| 11:21 | niemand | hm, no I don't?
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| 11:22 | niemand | afk for making lunch
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| 11:23 | Bertl | ah, probably just coincidence then, no problem
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| 15:33 | troy_s | Makes not much sense se6astian
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| 15:33 | troy_s | The chart and software will deliver the best values. The issue is the data.
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| 15:34 | troy_s | So fudging a grade is _no_ different, aside from the fact that it is a worse approximation.
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| 15:34 | Bertl | hmm? context? :)
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| 15:35 | troy_s | Again, the issue is the data, not the matrix. This can be confirmed by looking at the 3D LUTs Bertl and I futzed with the other day.
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| 15:35 | troy_s | The recent list post.
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| 15:35 | troy_s | Anyways... kind of goofy. Better is to simply sort out the data.
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| 15:37 | Bertl | ah, okay, well, I guess the idea is to be able to get some 'proper' footage to prepare for funding
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| 15:38 | troy_s | Then solve the data
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| 15:38 | troy_s | The issue is the data, and no grader can fix that
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| 15:38 | Bertl | working on it, but I think it will take a while till we can get a perfect profile
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| 15:38 | troy_s | The LUT / matrix result will _always_ skew where the chart is struggling which is again, _data_
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| 15:38 | troy_s | I think your clipscale is not a bad idea.
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| 15:39 | Bertl | well, it can be done already, even without the planned LUT before the matrix
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| 15:40 | Bertl | by creating the matrix only for the 'linear' range and then clipping/scaling the result via gamma LUT
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| 15:51 | rainer_vie_ | for later on if the HDR function is enabled, it would be cool to have a logarithmic LUT as well
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| 15:52 | Bertl | not sure that would make any sense
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| 15:52 | Bertl | we get 12bit max from the sensor, we have a 12bit LUT (12->16bit)
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| 15:53 | Bertl | you can already do any possible mapping with 1/16th the resolution
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| 15:53 | rainer_vie_ | ah yes forgot that its made on the sensor... so the 15 stops will be mapped into the 12 bits there with the kneepoints
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| 15:53 | Bertl | precisely
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| 15:53 | rainer_vie_ | got you
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| 16:36 | troy_s | rainer_vie_: Log only makes sense in bandwidth challenged contexts.
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| 16:37 | troy_s | rainer_vie_: And there technically aren't any knees. It is a linear diagonal until you hit either A) noise floor or B) random data ceiling (see discussions for issues with that upper range)
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| 16:38 | troy_s | Bertl: Totally agree - just use the linear segment.
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| 16:38 | troy_s | Bertl: Anyways... not fussed, just seemed silly as hell.
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| 16:38 | troy_s | (and a gross misunderstanding of what color is and why you need the chart version)
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| 16:41 | troy_s | (getting a "decent" looking image has little to do with the validity of a "decent" 709 transform. Anyone can take abstract raw junk data into a compositor and get to someplace different.)
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| 16:42 | Bertl | rainer_vie_ was talking about the HDR modes
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| 16:42 | rainer_vie_ | so the final raw data will have 16bits? because of 12>16bit LUT?
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| 16:43 | Bertl | the final data has 16bit, but is then converted to HDMI atm
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| 16:46 | rainer_vie_ | ok fine... only thinking on filesizes and bandwidth. makes it sense to convert to 16bit when the sensor delivers only 12 regarding writing it to SSD later on?
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| 16:47 | Bertl | I think the 12bits aren't even real on the Cmosis sensor :)
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| 16:48 | Bertl | so I doubt we will store all the 16bit generated atm, but it keeps the error low, i.e. we might even add a few bits during conversion
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| 16:50 | troy_s | Bertl: Whatever ends up HDR mode, keep close track of the TRC for inversion into compositing apps etc.
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| 16:58 | se6astian | time to leave
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| 16:58 | se6astian | bye
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| 18:00 | rainer_vie_ | going off as well... cu
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| 18:01 | Bertl | cya
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