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#apertus IRC Channel Logs

2020/12/16

Timezone: UTC


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Bertl_zZ
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06:09
Bertl
morning folks!
06:31
Bertl
off for now ... bbl
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Bertl
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BAndiT1983|away
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07:12
BAndiT1983
anuejn: which type of connector is it, that it break so often off? thought you're using one with THT to secure it
07:13
BAndiT1983
and before i forget, nice progress!
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11:17
anuejn
good morning :)
11:18
anuejn
Bertl_oO: can the beta be powered through the plugin module connector?
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11:43
EmilJ
Congrats on the USB3 readout working
11:44
EmilJ
I loaded the DNG files into FastRawViewer, the pixels have swapped B and R values, right?
11:44
EmilJ
Any clue about the cause for the constant noise pattern in the MP4? I can't see that in the raw files
11:45
EmilJ
(viewing MP4 in VLC)
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12:22
se6ast1an
just loaded the DNG sequence in davinci resolve and can confirm that the raw pixel order seems swapped
12:22
se6ast1an
image is blue instead of orange (tungsten)
12:23
se6ast1an
and on the right edge there are some artefact coloumns
12:41
anuejn
hm... thanks for the feedback re the color pattern
12:41
anuejn
i will look into this
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12:42
anuejn
I also noticed the artifacts on the right side but dont know where that shift is coming from
12:42
anuejn
EmilJ: I cannot see any constant noise pattern in the mp4
12:43
anuejn
can you explain a bit more what you mean with that
12:46
BAndiT1983
EmilJ: the constant noise is coming from the sensor, maybe swapped bits there
12:46
BAndiT1983
anuejn: he means the dark dots which do not move
12:47
BAndiT1983
e.g. when the table is shaking you see the random colored dots staying in place
12:47
BAndiT1983
*randomly
12:49
BAndiT1983
bottom row is flashing for me, checked in browser player and VLC
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13:23
anuejn
yup in the bottom there is a flashing area but that seems to be a conversion artefact
13:23
se6ast1an
https://paste.pics/ea12b86ded896daddc428706988f9f38
13:23
danieeel
anuejn: i see the constant noise pattern as well
13:23
anuejn
ah hm... interesting
13:24
anuejn
havent seen that til now
13:24
anuejn
any guess what that is?
13:24
danieeel
how did you made the mp4?
13:24
se6ast1an
can you feed a test image into the acquisition pipeline in the camera?
13:24
se6ast1an
to see what is coming out at the end over USB3?
13:25
se6ast1an
that way you could easily asses if its something happening with the processing pipeline or if that is coming from the sensor already
13:26
danieeel
in the dng i see some sharp dots, as if there was some coding/transmission error
13:27
anuejn
se6ast1an: i can set the image sensor to produce a testpattern
13:27
anuejn
I currently do not have any good testpattern generator in the fpga
13:27
anuejn
danieeel: transmission error seems not too unlikely ;)
13:27
danieeel
is it not compressed?
13:28
BAndiT1983
looks clean to me, i mean not compressed
13:30
anuejn
it is not compressed
13:30
anuejn
well... the mp4 is
13:30
anuejn
but the dng sequence not
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13:32
danieeel
the ASN / WB is very crude in the file :)
13:33
danieeel
or even the whole CM
13:33
danieeel
i'd say, its horizontally flipped as well? or the text on top of bed is reverse?
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13:35
BAndiT1983
webcam/front camera mode ;)
13:38
BAndiT1983
the noise pattern probably comes from the order of bytes in conversion
13:38
BAndiT1983
anuejn: what is the bit depth there?
13:39
danieeel
yes, the image has too much noise and it just might be one swapped the LSB's of the 2 side by side pixels
13:39
BAndiT1983
danieeel: yep, exactly my thought
13:41
danieeel
well, you can sell it as sort of Macrovision - high-def decode only for informed audience :P
13:41
danieeel
(reminds me the GPS intentional noise injection)
13:43
BAndiT1983
haven't heard of the GPS noise yet, but know for decades the copyright injection into images, without changing the pixel info much
13:43
BAndiT1983
digital watermark
13:43
danieeel
ehm: BitsPerSample = 8
13:44
BAndiT1983
but maybe original data is 10 or 12
13:46
danieeel
assuming 8 bit would be linear, it produces heavy posterization after developing - which might be that visually strong fpn
14:01
vup
original data is 12 bits
14:04
vup
The noise could also be a sensor artifact at high gain
14:05
anuejn
up the sensor is set to 12 bit and the data is then crippled down to 8 bit in the fpga for that example
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14:38
anuejn
danieeel: yup one thing that áºe also suspect is that some bits are mixed up
15:02
anuejn
https://github.com/apertus-open-source-cinema/axiom-recorder now has updated documentation :)
15:27
Bertl_oO
anuejn: (regarding power via plugin) not without special wiring
15:27
Bertl_oO
why do you ask? have you broken off the power conenctor as well? :)
15:57
anuejn
no
15:57
anuejn
I was just curious
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16:25
Bertl_oO
currently the 5V rails on the plugins are not connected
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Bertl_oO
the 3V3 and VIO rails would be a very bad idea to power the Beta
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16:27
Bertl_oO
assuming that the 5V rails are wired up, they could be used to power the Beta but only for light loads as the traces are not designed for a lot of power
16:28
Bertl_oO
and you could only power the microzed _or_ the beta at the moment
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Bertl_oO
although it would be possible to rewire that as well
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BAndiT1983
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Bertl_oO
off to bed now ... have a good one everyone!
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Bertl_oO
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BAndiT1983
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