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#apertus IRC Channel Logs

2015/06/28

Timezone: UTC


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jucar
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intracube
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g3gg0
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09:16
Bertl
off to bed now ... have a good one everyone!
09:16
Bertl
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g3gg0
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se6astian|away
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10:33
se6astian
good day
10:33
se6astian
if anybody has comments to the new website structure: apertus.org let me know
11:18
jucar
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11:53
comradekingu
se6astian: I think all of the cameras could be under one tab "hardware" and then a nested menu from there. Uses less visual space, and the dictator and other such things can fit in. Also it allows for more cameras in the future (instead of sending the current ones to legacy)
11:54
comradekingu
I think the home link could be removed, since its already at "apertus" About could be put on mouseover apertus
11:56
jucar
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11:57
comradekingu
I think "free (in terms of liberty), sustainable and open digital cinema tools" sounds nice, but doesnt so much explain matters to someone not in the know
12:24
se6astian
comradekingu: we only have one hierarchy menus currently and cant nest any submenus into them unfortunately
12:24
se6astian
removing home is an interesting idea
12:25
se6astian
I wonder though if enough people realize they can click the logo to get to the home page....
12:31
comradekingu
its what you do on wikipedia
12:32
comradekingu
Acutally there is a "Main page" too now that i looked
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intracube|away
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se6astian
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intracube
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14:29
intracube
clicking on site logo to go to home is really common
14:30
intracube
bbc.co.uk doesn't have any specific home link on most pages
14:32
intracube
photos.google.com has just got an extreme makeover and has done away with a lot of labelled buttons/link
14:32
intracube
*links
15:01
comradekingu
If you got to the home page once, you can get there again
15:17
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jucar
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16:30
Bertl_zZ
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16:30
Bertl
morning folks!
16:56
intracube
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intracube
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jucar
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20:32
troy_s
Bertl: Ping.
20:32
troy_s
Bertl: Any sensors that allow for a full piecewise curve to make a custom sensor response?
20:59
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21:23
Bertl
troy_s: none that I would know of (but there are many sensors which require NDAs to get datasheets)
21:24
se6astian|away
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21:25
se6astian
good evening
21:25
se6astian
troy_s: the question is what underlying method is used to make the sensels less sensitive in that area of the curve
21:26
se6astian
the CMV12000 does it with exposure time interruptions
21:26
se6astian
which isnt perfect ....
21:28
troy_s
se6astian: Yes... Voltage trickery
21:28
troy_s
se6astian: I ask because the Arri sensors do a very clever bit of trickery in that each stop ends up allocated with identical bits.
21:29
troy_s
Their loglike curve is excellent on that front, summing to around 14.5 stops (not marketing stops either)
21:34
se6astian
are you sure the sensors response curve itself in the alexa isnt linear?
21:39
troy_s
Have a look.
21:39
troy_s
No way to get the latitude.
21:39
troy_s
Most cameras offer a recording mode
21:39
troy_s
Linear or log
21:40
troy_s
Which behave precisely as we would expect
21:40
Bertl
if they offer linear, then it is very unlikely that the sensor is log
21:40
troy_s
Less latitude in linear with more granularity
21:41
troy_s
And more latitude in log
21:41
Bertl
so I presume the "log" formats are just a mapping of the linear values
21:41
troy_s
Nope
21:41
troy_s
See above
21:42
troy_s
The Sony docs even restate the abpve
21:42
troy_s
Less latitude versus more
21:42
Bertl
doesn't mean that the sensor does log
21:42
troy_s
Try to explain that without an on sensor voltage tweak
21:43
troy_s
Right so they are willingly tossing latitude
21:43
Bertl
not saying that it doesn't do this, but as a matter of fact, a truly logarithmic sensor would be complicated to build
21:44
Bertl
i.e. it is much simpler to use piecewise linear modes or make two or more exposures and "calculate" something you recognize as log
21:44
troy_s
Pretty sure it would be nothing more than something akin to pwl
21:44
troy_s
I am not saying the sensor is log
21:44
Bertl
but again, I don't know for those proprietary sensors
21:44
troy_s
I am saying it has a loglike mode
21:44
troy_s
Using whatever alchemy akin to pwl
21:45
troy_s
But almost certainly a PWL with more than one knee
21:45
troy_s
Or two
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21:52
Bertl
not sure what you base that conclusion on
21:53
troy_s
Bits per stop
21:56
troy_s
Or Bertl do you think we could do a PWL interpolating
21:56
troy_s
To smooth the bit distribution
22:04
troy_s
(By "most certainly" I meant that whatever they are doing it isn't a simple set of linear points between their exposure measurements, not that they are necessarily using a PWL or such. Could be anything.)
22:04
troy_s
(Somewhere there is interpolation is the guess, and it isn't a lerp.)
22:07
Bertl
well, do you have raw (real raw) sensor data?
22:08
Bertl
otherwise, good random data will give you perfect bit distribution
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se6astian
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se6astian|away
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intracube
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se6astian
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jucar
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00:51
troy_s
Bertl: To smooth the sensor data to a proper log curve.
00:52
troy_s
(To optimize the bits per stop)
00:59
Bertl
unfortunately without actual sensor data, it is all speculation