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#apertus IRC Channel Logs

2018/03/18

Timezone: UTC


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skat00sh_
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BAndiT1983
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supragya
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supragya
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04:08
Bertl
off to bed now ...
04:08
Bertl
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xfxf_
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rton
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06:44
supragya
RexOrCine, available? need review!
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[simon]
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11:45
Bertl_zZ
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11:45
Bertl
good morning folks!
11:45
supragya
hi Bertl
11:46
supragya
Do we have any special place to upload images for Wiki?
11:48
Bertl
depends on the images (size, type)
11:48
Bertl
illustrations probably can go directly into the wiki (preferably as SVG)
11:48
supragya
I found it... thanks
11:49
Bertl
for larger files like snapshots or movie sequences there is a fileserver
11:55
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12:00
supragya
page edited: https://wiki.apertus.org/index.php/RAW12
12:04
Bertl
good
12:07
supragya
last night hassles link: https://wiki.apertus.org/index.php/RAW12#Understanding_the_RAW12_file_format
12:09
Bertl
minor nitpick: the sensel does not 'have' 12 bits, the sensel is analog, the ADC in the sensor converts it to 8-14bit depending on sensor and configuration, but the image pipeline in the FPGA produces 12bit values
12:12
supragya
is it okay now?
12:14
Bertl
looks good, there is another twist though, the sensor can mirror the image vertically
12:14
Bertl
(the sensor being cmv12k)
12:15
Bertl
in this case, the bayer pattern is mirrored too
12:15
Bertl
i.e. the first line then starts with GBGBGB... and the odd lines are RGRGRG...
12:16
supragya
you mean something like BOTTOM_UP_DIP?
12:16
supragya
*DIB?
12:17
supragya
or just pattern change from RGGB to GBRG
12:17
Bertl
the sensor simply reverses the order how the image is read out
12:17
supragya
so last byte is the logical first byte?
12:17
Bertl
so you get the last line first, then the previous to last, and so on till you reach the first row
12:17
supragya
so rows are reaarranged... but each row is intact?
12:18
Bertl
yup
12:18
supragya
will add them in a moment :)
12:22
supragya
done. Looks good now?
12:24
Bertl
s/inverted/flipped/ or s/inverted/mirrored/
12:24
Bertl
invert usually means reversing the color
12:25
supragya
done
12:26
Bertl
yep
12:31
supragya
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12:31
[simon]
a vertically mirrored image doesn't mean that the columns are reaarranged?
12:34
Bertl
correct
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rahul
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12:56
Bertl
welcome rahul!
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13:01
[simon]
I'm sorry I meant that if the image is vertically mirrored than the colums must be flipped, like RGRGRGRG -> GRGRGRGR or I'm wrong?
13:02
Bertl
the first row will start with RGRGRG... the second one follow with GBGBGB... no change in the order
13:02
Bertl
I mean GBGBGB.. then RGRGRG... sorry
13:07
[simon]
but isn't this orizzontally mirrored?
13:08
Bertl
correct
13:08
supragya
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13:08
Bertl
horizontal mirroring is available too, but that needs support on the image pipeline side
13:10
RexOrCine
supragya: Highlight the bits you want me to check.
13:11
supragya
hi [simon], it is quite common to have vertical mirroring. Not sure about horizonatal mirroring though. It is so common that some formats allow frame to be stored bottoms up. See: https://msdn.microsoft.com/en-us/library/windows/desktop/dd407212(v=vs.85).aspx
13:11
supragya
hi RexOrCine !
13:11
RexOrCine
Hey.
13:15
[simon]
thanks for the clarifications :)
13:30
Bertl
np
14:03
rahul
Hello I am Rahul Vyas, Computer Engineering MSc student from TU Delft, Netherlands.
14:03
Bertl
hey, how's it going?
14:03
nmdis1999
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14:04
rahul
Although I've started late, but I have worked on the similar topic at TU Delft.
14:05
Bertl
similar topic being?
14:07
rahul
I have designed the real time video processing engine using PYNQ board (ZYNQ based), and have used Vivado HLS tools to deploy the kernel on the FPGA fabric for displaying the edges with red color.
14:08
Bertl
nice, so you're comfortable with HDL and FPGAs in general
14:12
rahul
Yes, so I am doing my minors in Reconfigurable computing, I have earlier worked on designing FPGA (mainly coded in VHDL) based communication platforms for Avionics/ IOT applications. my publication link (http://ieeexplore.ieee.org/document/7889931/) .
14:12
Bertl
sounds good to me ...
14:12
Bertl
check out https://wiki.apertus.org/index.php/GSoC_Overview if not done so already
14:13
Bertl
also pick your task(s), we have a number of interesting HDL related ones
14:13
Bertl
make sure to complete the challenge task(s) and do some nice proposal(s)
14:14
Bertl
you can ask here anytime for input and/or reviews on both the challenges and the proposals
14:14
Bertl
(GSoC applicants as well as mentors are happy to help)
14:15
supragya
finally Bertl is getting some HDL applicants XD. :)
14:15
rahul
Thank you for the support.
14:15
BAndiT1983|away
changed nick to: BAndiT1983
14:16
BAndiT1983
hi supragya
14:16
supragya
hi BAndiT1983 *waving hands*
14:16
BAndiT1983
read logs from yesterday and have to say that NLE is not the scope of OC
14:16
supragya
looked like it
14:17
BAndiT1983
OC can be used as data provider and as tool for first color grading, but other apps are more suitable and have more developers
14:17
supragya
that NLE thing felt quite tangential to me.
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supragya
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supragya
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BAndiT1983
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supragya
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16:10
RexOrCine
"What a phenomenal project! In general I'm very keen to watch open source hardware find its way into more and more applications, but I never expected such a specialised, sophisticated one. Huge props to the team, and I wish all the best for the project!"
16:16
supragya
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16:33
Bertl
RexOrCine: what project? :)
16:33
RexOrCine
AXIOM.
16:34
supragya
who said?
16:35
RexOrCine
Just a guy who subscribed to our pre-note lists, namely Re ABEX.
16:38
ArunM
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16:40
Bertl
off to shovel some snow .. bbl
16:40
Bertl
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16:41
supragya
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ArunM
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skat00sh_
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17:50
RexOrCine
Is it deep?
18:00
Bertl_oO
about 5-6cm, not very much ...
18:02
supragya
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18:02
supragya
never seen snow after the age 8! and that too only once - life at tropics :)
18:30
Kjetil
You're missing out :)
18:30
supragya
I know :)
18:42
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supragya
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BAndiT1983|away
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20:03
LordVan
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LordVan
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20:17
TofuLynx
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20:18
TofuLynx
Hello!
20:18
TofuLynx
Just had a mini course today related to photography directing, it was great
20:19
TofuLynx
btw BAndiT1983, I haven't got that bug in OC Downscaler fixed
20:19
TofuLynx
I have debugged it to some extent
20:21
TofuLynx
so far I have determined that the bug is only visible in the green and blue channels, which coincidentally are in the odd rows. (when I removed the green2 from the extractor, the bug disappeared from the green channel)
20:22
TofuLynx
I will have to research this further
20:41
TofuLynx
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BAndiT1983
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LordVan
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[simon]
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