Current Server Time: 19:33 (Central Europe)

#apertus IRC Channel Logs

2014/12/20

Timezone: UTC


01:03
aombk2
what is this thing the panasonic varicam35 camera has?
01:03
aombk2
two native isos?
01:03
aombk2
changed nick to: aombk
01:04
aombk
thats a sensor thing or a sensor board etc. thing?
01:12
Bertl
no idea
01:21
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02:30
Bertl
off to bed now ... have a good one everyone!
02:30
Bertl
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08:01
fsteinel_
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08:39
Bertl_zZ
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08:39
Bertl
morning folks!
08:40
mars_
morning
10:06
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12:21
se6astian|away
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12:23
se6astian
good day
13:46
se6astian
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14:14
Bertl
off for now .. bbl
14:14
Bertl
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14:21
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15:35
se6astian|away
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15:36
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16:05
intracube
hello
16:08
intracube
what could be the causes of the FPN-like row noise on the cmv12000?
16:08
intracube
from here: http://www.magiclantern.fm/forum/index.php?topic=11787.msg129672#msg129672
16:19
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16:25
Topic
apertus° - open source cinema | www.apertus.org | join the apertus° Lab: http://lab.apertus.org/ | IRC Logs available at: http://irc.apertus.org
16:25
se6astian
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16:38
Topic
apertus° - open source cinema | www.apertus.org | join the apertus° Lab: http://lab.apertus.org/ | IRC Logs available at: http://irc.apertus.org
16:38
se6astian
has set the topic
16:41
philippej|away
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aPinky
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16:49
Topic
apertus° - open source cinema | www.apertus.org | join the apertus° Lab: http://lab.apertus.org/ | IRC Logs available at: http://irc.apertus.org
16:49
se6astian
has set the topic
16:51
Bertl_oO
intracube: not sure what exactly you are referring to?
16:52
Bertl_oO
the noise in the second column looks like the dynamic noise from the bad voltage regulator inside the CMV12k
16:52
Bertl_oO
this should be fixed in the next sensor frontend we build, as we now know that it exists and how to mitigate it
16:58
intracube
Bertl_oO: yep, the second column
16:58
intracube
"After subtracting two dark frames (taken at a few seconds one after another), the image still has a really strong row noise (visually similar to FPN, but it's not fixed - it changes every frame). This one is hard to correct. CMOSIS recommends using the optical black areas for this, but they are way too small"
16:59
intracube
great to hear this has been resolved :)
16:59
Bertl_oO
yes, I think 95% of that noise should not be present anymore
16:59
Bertl_oO
but we'll see if we get there :)
16:59
intracube
cool
17:00
intracube
although as it says in that post, the images have been normalized, so even with the alpha cam, the effect appears far worse than it is
17:01
intracube
"All graphs have brightness stretched... They show how uniform the noise is, not its magnitude."
17:02
Bertl_oO
yes, of course, it makes sense to boost the range to see how the noise behaves
17:04
intracube
right
17:04
intracube
doesn't remember seeing the fluctuating row noise on the alpha footage
17:05
intracube
only some residual (fixed) FPN
17:05
Bertl_oO
it is noticeable in single frames
17:05
Bertl_oO
you do not see it in a sequence as it changes from frame to frame (and it is rather subtle)
18:37
Bertl_oO
changed nick to: Bertl
18:59
Sauron
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18:59
Sauron
Hola
18:59
Sauron
hi
18:59
Bertl
Hey, how's the eye?
19:00
Sauron
its good
19:00
Sauron
fucking frodo baggins
19:00
Bertl
yaeh, PITA
19:00
philippej
changed nick to: philippej|away
19:01
Bertl
so what brings you here?
19:06
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19:06
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19:45
Bertl
off for a nap ... bbl
19:45
Bertl
changed nick to: Bertl_zZ
19:55
slikdigit
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20:22
danieeel
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20:37
comradekingu
what do you think about calling the camera "servicable"?
20:37
comradekingu
Most things only have user manuals, this is quite like a service manual thats extencive
20:37
comradekingu
extensive
20:41
se6astian
good idea
21:34
Bertl_zZ
changed nick to: Bertl
21:34
Bertl
back now ...
21:42
g3gg0
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21:51
davidak
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21:55
troy_s_
Bertl: I missed your discussion with intracube above. Are there new images or something?
21:58
Bertl
no, not really, we just discussed the analysis alexML did
22:06
intracube
troy_s_: you only missed two lines: "[16:08:21] <intracube> what could be the causes of the FPN-like row noise on the cmv12000?"
22:06
intracube
"[16:08:32] <intracube> from here: http://www.magiclantern.fm/forum/index.php?topic=11787.msg129672#msg129672"
22:06
intracube
troy_s_: or you could, you know, look at the irc logs :P
22:07
troy_s_
Logs.
22:07
troy_s_
I have a log for you.
22:07
se6astian
good night
22:07
se6astian
changed nick to: se6astian|away
22:10
intracube
o.O
22:15
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22:16
Bertl
intracube: yeah, I would be careful when he gets the big log :)
22:18
intracube
unless it's a chocolate yule log
22:18
intracube
then gimme :)
22:23
troy_s_
shudders.
22:23
troy_s_
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22:28
intracube
troy_s: ?
22:59
g3gg0
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23:03
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