23:16 | aombk | left the channel | |
00:20 | aombk | joined the channel | |
02:41 | Bertl | off to bed now ... have a good one everyone!
| |
02:41 | Bertl | changed nick to: Bertl_zZ
| |
06:38 | se6astian | good day
| |
09:47 | alMalsamo | left the channel | |
10:24 | alMalsamo | joined the channel | |
12:40 | LordVan_ | left the channel | |
12:44 | Bertl_zZ | changed nick to: Bertl
| |
12:44 | Bertl | morning folks!
| |
13:34 | alMalsamo | left the channel | |
13:34 | alMalsamo | joined the channel | |
15:12 | intrac_ | joined the channel | |
15:13 | intrac | left the channel | |
16:00 | se6astian | MEETING TIME, who is here?
| 16:01 | Bertl | is here ...
| 16:02 | vup | is here
|
16:02 | se6astian | great, vup do you want to share some insights into the image analysis, or anything else new?
| |
16:03 | vup | sure
| |
16:03 | vup | not really a lot to report, but a quick tldr:
| |
16:04 | vup | Bertl suggested to put every two rows side by side and like this, a lot of the darkframe patterns seem to match up with the readout
| |
16:05 | vup | meaning, that columns 0, 128, 256 seem to be correlated, as well as columns 1, 129, 257, etc
| |
16:05 | vup | this can be seen here: sebastian_darkframe_2048_1x_12.990288.blob.zst
| |
16:05 | vup | whoops here: https://files.niemo.de/darkframe_pdfs/column_wise_averages.png
| |
16:05 | vup | unfortunately it does not seem like we have found the cause for the dynamic column noise yet
| |
16:06 | vup | se6astian tried some different settings for the sensor and these don't seem to have made any difference
| |
16:07 | vup | There are some interesting patterns in this column noise however
| |
16:07 | vup | it does seem to have a pretty interesting frequency composition: https://files.niemo.de/darkframe_pdfs/column_residual_noise_fft.pdf
| |
16:09 | vup | its also unclear if correcting this dynamic column noise will actually help that much
| |
16:09 | vup | even if we could perfectly correct it, it only brings the standard deviation of the residuals down from 5.39 (at 1x gain) to 4.9)
| |
16:10 | vup | so yeah thats pretty much it, se6astian took some full width darkframes today that should be interesting to investigate, as those should have the dark columns
| |
16:11 | vup | other than that I think capturing some flat fields and starting to prototype some first image correction flows is pretty much whats next to do
| |
16:11 | se6astian | sounds good
| |
16:12 | vup | if anybody has input on what metric one could use to measure the "success" of the image correction flow I would be pretty interested. For now the best I (and anuejn) could come up with is capturing a homogeneous signal and then evaluating the corrected image for the homogeneity.
| |
16:12 | vup | (For response curve one could then also use different exposure times to measure the linearity)
| |
16:12 | vup | oh
| |
16:13 | vup | I did not work on this, but somebody implemented 3d lut color correction for the recorder: https://github.com/apertus-open-source-cinema/axiom-recorder/pull/22
| |
16:13 | vup | that might be fun to play with
| |
16:13 | vup | Ok I think thats it from me
| |
16:13 | se6astian | oh cool, I created 3D LUTs to play around with for anuejn recently
| |
16:14 | se6astian | who is philipp? very cool addition
| |
16:14 | anuejn | philipp is my room-mate :)
| |
16:15 | se6astian | har! great :D
| |
16:15 | anuejn | somehow there is still a difference between davinci and the recorder but in principle it works :)
| |
16:15 | se6astian | could it be color space related?
| |
16:15 | anuejn | mmh?
| |
16:17 | se6astian | my color space mastery is very basic but a 3D LUT as I understand it is always a relative adjustment and depends on the color space the source image is coming from/resides in
| |
16:19 | vup | ah yeah, it could maybe be a srgb vs rgb thing?
| |
16:20 | anuejn | we checked a bit but couldnt find the problem (yet)
| |
16:21 | anuejn | we also added a parade view to analyze a bit but the difference is even there
| |
16:21 | anuejn | so it is not just output differences
| |
16:21 | se6astian | you mean the raw image already looks different?
| |
16:22 | se6astian | without any adjustments?
| |
16:22 | anuejn | no, i meant that the processed image looks different but also really _is_ different
| |
16:22 | anuejn | so it is not an output problem
| |
16:23 | se6astian | ok
| |
16:23 | se6astian | in resolve you can check with Project Settings -> Color Management
| |
16:24 | se6astian | Timeline color space in my case is Rec709 Gamma 2.4
| |
16:25 | se6astian | anuejn: anything else to report?
| |
16:25 | anuejn | nope, nothing from me this week
| |
16:25 | se6astian | right
| |
16:26 | se6astian | quick updates from me: as vup reported some darkframe captures were conducted
| |
16:26 | se6astian | I will send a polycarbonate sheet sample to manfred and Bertl tomorrow via envelope to test laser cutting it
| |
16:27 | se6astian | Bertl received the ultra felxible FPC hdmi cable sample last week I ordered from china
| |
16:27 | se6astian | GSoC for another season is approaching soon
| |
16:28 | se6astian | the org application starts second week of february
| |
16:28 | se6astian | so mentors please start to think if you want to mentor again this year
| |
16:28 | se6astian | or if someone new wants to mentor maybe
| |
16:28 | se6astian | and what could the tasks be, what was done/completed last year, etc.
| |
16:28 | se6astian | the idea page will play a central role again in our application
| |
16:29 | se6astian | not much else to report from my side
| |
16:29 | se6astian | the CCC stil requires more time to release our talk
| |
16:29 | se6astian | but it can be watched in a "relive" list
| |
16:30 | se6astian | where basically just the streamed original recordings reside
| |
16:30 | se6astian | anyone else with news/questions or anything to report?
| |
16:31 | Bertl | nothing here this week, was unfortunately otherwise busy ...
| |
16:36 | se6astian | alright then, MEETING CONCLUDED, many thanks all participants!
| |
16:40 | Bertl | thanks for the moderation!
| |
16:41 | se6astian | my pleasure
| |
16:41 | Bertl | off for now ... bbl
| |
16:41 | Bertl | changed nick to: Bertl_oO
| |
16:47 | intrac_ | left the channel | |
16:47 | intrac | joined the channel | |
18:55 | alMalsamo | left the channel | |
18:57 | intrac_ | joined the channel | |
18:59 | intrac | left the channel | |
21:05 | intrac_ | left the channel | |
21:05 | intrac | joined the channel |