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#apertus IRC Channel Logs

2015/02/27

Timezone: UTC


23:55
Bertl_oO
off for a nap ... bbl
23:56
Bertl_oO
changed nick to: Bertl_zZ
00:06
fsteinel_
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00:09
fsteinel
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02:31
intracube
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03:16
troy_s
IT IS BLUE AND BLACK
05:13
Bertl_zZ
changed nick to: Bertl
05:13
Bertl
morning folks!
05:39
fsteinel_
changed nick to: fsteinel
06:51
cbohnens|away
changed nick to: cbohnens
06:52
cbohnens
good morning
06:54
niemand
joined the channel
07:02
se6astian|away
changed nick to: se6astian
07:02
se6astian
good morning
07:35
niemand
left the channel
10:19
niemand
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10:40
philippej|away
changed nick to: philippej
11:33
niemand
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12:29
niemand
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13:32
Francky_
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13:33
Francky_
hi everybody
13:37
cbohnens
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13:38
Bertl
hey Francky_!
13:40
Francky_
i'm back
13:40
Francky_
:)
13:45
Bertl
wb Francky_!
13:47
philippej
changed nick to: philippej|away
13:49
intracube
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13:52
Francky_
Bertl : where do you tell to the builder thant you want to connect a signal (for example cmv_lvds_ctrl_p) to a pin ? Is it the xdc file ?
13:59
Bertl
yes, the xdc files specify all in/out connections
14:01
Bertl
i.e. everything external to the FPGA is specified there
14:04
Francky_
I don't know why i thought that it were simulation files...
14:04
Francky_
thanks
14:04
Bertl
the "builder" btw, is Vivado
14:42
Bertl
off for a nap ... bbl
14:42
Bertl
changed nick to: Bertl_zZ
15:07
se6astian
time to leave the office
15:07
se6astian
changed nick to: se6astian|away
15:10
niemand
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15:15
niemand
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15:28
Francky_
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15:59
se6astian|away
changed nick to: se6astian
17:38
intracube
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17:46
lab-bot
sebastian created T299: Document first two meeting notes from google doc to WIKI pages. http://lab.apertus.org/T299
18:10
se6astian
changed nick to: se6astian|away
18:28
MatthiasF
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18:38
se6astian|away
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19:01
alesage
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alesage
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alesage
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alesage
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19:08
MatthiasF
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19:21
MatthiasF
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19:39
niemand
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19:50
se6astian
changed nick to: se6astian|away
19:54
intracube
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20:05
troy_s
MatthiasF: Greets.
20:08
MatthiasF
troy_s: Hi
20:17
MatthiasF
troy_s: What are you up to ?
20:17
troy_s
MatthiasF: Bertl_zZ is the peep to ping.
20:17
troy_s
MatthiasF: Was about to head out.
20:17
MatthiasF
I pinged se6astian|away and he uploaded some dark frames
20:17
troy_s
Bertl_zZ: Meet MatthiasF, a signal processor extrodinaire. Probably a great head to have around if he does.
20:18
troy_s
MatthiasF: Well that's great.
20:18
troy_s
MatthiasF: I suspect dark frames will only take the photosite noise so far
20:18
MatthiasF
He uploaded there -> http://files.apertus.org/AXIOM-Alpha/
20:19
MatthiasF
It will at least take the bias out
20:19
troy_s
MatthiasF: I'm reasonably sure that Argyll takes the image and inversely rolls it to get the estimated whites.
20:19
troy_s
(As in it knows the target white, so it inversely rolls it to align the whites to the estimated.)
20:20
MatthiasF
Well, my whites are white enough with the direct calibration for now
20:21
MatthiasF
Noise is really the issue right now, especially since I want a clean signal for demosaicking
20:21
MatthiasF
I would also need blank frames to compensate photo response (gain) non uniformity
20:23
MatthiasF
Right now, I'm parsing the metadata block in my framework to get the dark frames exposure times. So I can use those dark frames for the IT8 exposure.
20:24
troy_s
MatthiasF: There was a more ideal 5000k shot somewhere in that test batch of shots.
20:24
troy_s
MatthiasF: Still had errors, but a 3D LUT with some curves pulled the dE down to 4.0 or so.
20:24
MatthiasF
Ok, but which one ?
20:25
troy_s
MatthiasF: (Where 1.0 dE is a Just Noticeable Difference (JND)
20:26
troy_s
MatthiasF: Try one of the scene_daylights
20:27
troy_s
MatthiasF: The scene_halogens also have a better selection of exposures
20:27
troy_s
MatthiasF: But of course, then you are dealing with the white color estimation again, albeit from a source that is likely relatively reliable.
20:29
troy_s
MatthiasF: I can't recall if Herb made the PNGs using the linearized data or not. IT8s are damn fussy, and most are underexposed when shot. You want the chart that is exposed heavily, without heading into the batshit crazy part of the sensor.
20:30
MatthiasF
the PNG I have seen so far are the raw RGB
20:31
troy_s
Right. So hard to judge the exposure from the PNGs.
20:31
troy_s
Argyll will spit out til files etc that are great to analyse.
20:31
MatthiasF
I guess I will just download all raws and review them with my tool
20:32
troy_s
I can't help on the signal stuffs obviously. Only the color stuffs.
20:33
MatthiasF
FTP access would be easier to batch download those files :/
20:35
troy_s
bah wget
20:37
MatthiasF
I like to avoid wasting time with the command line ;)
20:45
niemand
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21:44
niemand
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22:04
MatthiasF
left the channel
22:32
intracube_
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22:35
intracube
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22:39
Bertl_zZ
changed nick to: Bertl
22:39
Bertl
back now ...
22:40
Bertl
troy_s: funny guy, must me relatively young - doesn't realize that ftp comes from the command line .... anyway, for the record, using a proper "ftp" client like lftp works too :)
22:40
Bertl
s/me/be/
22:41
troy_s
Bertl: he was being melodramatic
22:41
troy_s
Working on his PhD math and signals.
22:41
troy_s
;)
22:42
troy_s
Ridiculously brillint peep
22:42
Bertl
hehe, sounds good
22:42
comradekingu
i read meth and signals
22:42
Bertl
crystal clear?
22:42
troy_s
Meth PhD too
22:43
comradekingu
must go to sleep, going to barcelona tomorrow :)
22:46
Bertl
barcelona sounds fun
22:48
troy_s
Spent a month and a bit in Valencia