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#apertus IRC Channel Logs

2022/11/14

Timezone: UTC


16:00
Bertl
MEETING TIME!
16:00
anuejn
is here
16:00
Bertl
se6astian will be late today, so please /msg me if you want to report
16:01
Bertl
okay, anuejn, please go ahead with your report
16:02
anuejn
after a survey of available rust TIFF / DNG libraries, I found that none of the librarys support zero-coppy reading / writing
16:03
anuejn
that would be an unnescessary performance bump
16:03
anuejn
so I decided to write yet another tiff library for rust
16:04
anuejn
Aditionally I understood the DCP format ("DNG Camera Profile")
16:05
anuejn
I can currently dump the IFDs of DNG files to Human readable YAML files
16:05
Bertl
that sounds great!
16:05
anuejn
currently I am building the YAML reading and DNG writing
16:05
anuejn
thats it from my side
16:05
Bertl
excellent!
16:06
Bertl
from my side, there isn't much to report. INT/LAM is still testing the changes we did including binning but there have been some unforseen delays on their side
16:07
Bertl
other than that, nothing relevant happened here ...
16:07
Bertl
any other reports?
16:08
se6astian
just arrived, brief updates from me:
16:08
se6astian
manual hdmi plugin module assembly planned for 21st
16:08
se6astian
the roadmap page has been updated with recent areas of developments
16:08
se6astian
https://www.apertus.org/axiom-beta-status
16:09
se6astian
please take a look and let me know if you find any error or typo
16:09
se6astian
thats it basically from my side
16:09
se6astian
many thanks Bertl for taking care of this meeting
16:10
Bertl
you're welcome!
16:12
Bertl
okay, so I guess that
16:12
Bertl
is it for today?
16:12
se6astian
yes :)
16:13
vup
I guess I can report some small news
16:13
Bertl
ah!
16:13
vup
I tried to capture some flatfields using the method suggested by ryan of just pointing the camera at a monitor
16:14
vup
however, my first try I left the camera inside the lense mount adapter / holder thingy
16:14
vup
which caused the edges of the sensor to not get as much light as the middle
16:15
vup
I now tried a second round, where I removed the lens adapter, which seems to work better, but its now hard to judge if the sensor is actually lit homogenously or what I get is just still non homogeneous illumination of the sensor
16:15
vup
nonetheless, i already did some basic analysis of the data
16:16
vup
and below the saturation the response curve seems to be pretty linear with deviations of at maximum about 1% from perfect linearity
16:16
vup
but when reaching the saturation value of the pixels the response curve starts to get pretty nonlinear
16:17
vup
furthermore there seems to be a wide spread of the actual saturation value of the pixels
16:17
vup
(about 98% of saturation values lie inside a interval of size ~450)
16:18
vup
the nonlinearity when reaching the saturation value is actually pretty helpful as it causes the slope of the response curve to get smaller, so one gets more dynamic range from that
16:19
vup
ill try to capture some more flatfields with the lens adapter remove soon and share some more in depth results then
16:19
vup
thats it from me
16:20
Bertl
thaks! sounds interesting!
16:21
Bertl
okay, last chance for any reports within the meeting then ;)
16:23
Bertl
thanks everyone!
16:23
Bertl
MEETING CONCLUDED!