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#apertus IRC Channel Logs

2018/05/15

Timezone: UTC


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Bertl_zZ
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05:54
Bertl
morning folks!
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Bertl
off for now ... bbl
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Bertl
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15:10
supragyaraj
Hi se6astian Bertl_oO : Have the znc servers been set up successfully?
15:20
RexOrCine|away
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15:21
BAndiT1983|away
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15:24
supragyaraj
hi BAndiT1983
15:25
BAndiT1983
hi supragyaraj
15:26
supragyaraj
how's it going BAndiT1983 ?
15:27
BAndiT1983
rather okay, and you?
15:27
supragyaraj
a bit bogged down with things, still feeling great
15:28
supragyaraj
I will send you and g3gg0 an email of my emulation program design
15:28
supragyaraj
I should have a basic emulation ready for testing feasibility (in terms of speed) by weekend
15:28
BAndiT1983
ok, looking forward to it
15:28
BAndiT1983
what is the basic process of it?
15:29
supragyaraj
I will send an email... the explanation would be lengthy
15:29
supragyaraj
but in short
15:30
supragyaraj
I will have the stream saved in memory and then given off to the "recorder" as a stream
15:30
BAndiT1983
sounds good
15:30
supragyaraj
this stream will maybe be served through fuse or something.. and then we flush the saved MLV to memory itself.
15:31
supragyaraj
The reason of this right now is to check if it is possible
15:31
supragyaraj
and there are no bottlenecks...
15:31
supragyaraj
main memory everywhere so that I can isolate my HDD speed to not being a bottleneck
15:31
BAndiT1983
FUSE would be overkill, in my opinion
15:32
supragyaraj
FUSE is just there to help in emulation (to model the stream)... In real case, we wont use it
15:33
supragyaraj
https://github.com/supragya/AXIOM_RawStreamHandler/tree/master/src
15:33
supragyaraj
These are the 4 components
15:33
supragyaraj
generator: creates MLV vidf structs etc (which in real life would be given off by AXIOM)
15:34
supragyaraj
stream_emulator: put the generated files in memory and serves it as a stream
15:34
supragyaraj
stream_handler: Our actual system
15:34
supragyaraj
publisher: converts MLV to DNG
15:35
supragyaraj
stream_handler is multithreaded for each source/stream connected.. (more on it in email)
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RexOrCine
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manan1999_
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manan1999_
Hi, I'm a newbie and would like to start contributing as a software developer. Please advise about where I can get started from
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manan1999_
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16:48
manan1999_
Hi, I'm a newbie and would like to start contributing as a software developer. Please advise about where I can get started from
16:49
supragyaraj
ah... nice
16:49
supragyaraj
how are you manan1999_
16:49
manan1999_
I'm good
16:49
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16:50
supragyaraj
what are you interested in manan1999_ ?
16:50
supragyaraj
in terms of software development? your skills?
16:51
manan1999_
I mostly have experience with web development(flask)
16:51
manan1999_
but I'm open to and looking forward to learning something new
16:52
supragyaraj
have you looked at / know what apertus is about?
16:53
manan1999_
I looked at it but would like a further insight
16:53
supragyaraj
there is OpenCine (C++/Qt) for our software end on PC (raw image manipulation / color correction etc)
16:54
supragyaraj
and then there is website itself (however I am not sure how much of it's access is given to public), it wont be on flask however
16:55
supragyaraj
the main thing is AXIOM cameras themselves which involves circuity / VHDL / FPGA development
16:55
manan1999_
I'm afraid I don't have experience with any of them
16:55
supragyaraj
well, noone does when they come in!
16:56
BAndiT1983
there is also PCB inspection, using opencv through python, frontend done with nodejs
16:56
supragyaraj
it gets easier ;)
16:56
BAndiT1983
or newsletter templating
16:56
manan1999_
I could work on the frontend/opencv
16:56
supragyaraj
ah yes, BAndiT1983 that!
16:56
BAndiT1983
this is the repo -> https://github.com/apertus-open-source-cinema/pcb-aoi
16:56
supragyaraj
what happened to it? is it not working
16:56
BAndiT1983
supragyaraj, what is not working?
16:57
manan1999_
how does newsletter templating work
16:57
supragyaraj
the newsletter templating
16:57
supragyaraj
you said last newsletter was made manually
16:57
BAndiT1983
have anyone developed templating stuff further? we are still at manual cahnges at the moment
16:57
supragyaraj
I guess you were upto it? we have a lab task for it?
16:57
BAndiT1983
currently we use MJML for newsletter layout, but it requires manual text insertion
16:58
BAndiT1983
idea was to use templating library to bypass that and to insert texts and images automatically, from some content file
16:58
BAndiT1983
supragyaraj, nope, have enough of other stuff to do, also besides apertus
16:58
supragyaraj
the templating was done a little by me... and later taken over by BAndiT1983 who did quite some work on it.
16:59
BAndiT1983
haven't done anything besides testing, we still use the original MJML layout
16:59
supragyaraj
manan1999_: If you would like to work on it, I would help you begin on that task... it should be a good fit for you.. if you like
17:00
manan1999_
Thank you so much
17:00
manan1999_
when can I start
17:00
BAndiT1983
anytime ;)
17:00
supragyaraj
free right now ?
17:00
supragyaraj
i'll walk you through in PM
17:01
manan1999_
yeah
17:01
supragyaraj
getting PM messages manan1999_ ?
17:02
manan1999_
yup
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se6astian|away
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TofuLynx
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18:30
TofuLynx
Hello BAndiT1983
18:30
supragyaraj
TofuLynx: how's it going?
18:31
TofuLynx
Hello raj!
18:31
TofuLynx
I am doing okay, what about you?
18:32
TofuLynx
bogged with some things?
18:32
supragyaraj
kindof yes
18:33
BAndiT1983
hi TofuLynx
18:33
BAndiT1983
exams?
18:34
TofuLynx
I am seeing your bilinear implementation right now
18:35
TofuLynx
you used a different concept of offsets
18:39
BAndiT1983
could you write a test for it, so we can compare output with newer implementation?
18:41
manan1999
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18:42
TofuLynx
what do you mean?
18:42
TofuLynx
a Unit test?
18:43
BAndiT1983
yep
18:47
TofuLynx
I will do it, but not now. I want to understand the logic behind your implementation
18:47
BAndiT1983
ok
18:47
TofuLynx
do you have a snippet of your implementation with you? Do you want a link?
18:47
supragyaraj
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18:48
BAndiT1983
i can look it up in github
18:48
TofuLynx
https://github.com/TofuLynx/opencine/blob/777ee30e8cdf6d6a9ba9ee6b8152f3034e8c8dae/Source/OCcore/Image/BilinearDebayer.h
18:48
BAndiT1983
do you have specific questions?
18:49
TofuLynx
Yeah
18:49
TofuLynx
I just want you to guide me behind the logic
18:49
TofuLynx
let's assume we are handling a RGGB image
18:50
BAndiT1983
colorOffsets specify the starting points for first missing pixel of each color
18:50
BAndiT1983
so the algorithm know where to start
18:50
TofuLynx
hmm
18:50
TofuLynx
why isnt Red 0 and 1 then?
18:51
BAndiT1983
because it isn't taking borders into account, was done for simplicity back then
18:51
TofuLynx
what's a pixel for you? the 4 colors?
18:51
BAndiT1983
nope, just a single pixel
18:51
BAndiT1983
rggb are 4 pixels
18:51
TofuLynx
hmm so it starts in the blue position?
18:52
Bertl_oO
well, actually we call them 'sensel'
18:52
BAndiT1983
ok, ok, sensel
18:52
TofuLynx
Sure, lets go with sensel
18:52
BAndiT1983
yep, it starts at blue position, but calculates red there, as known red pixels are in diagonal positions from it
18:53
Bertl_oO
it makes it simpler to discuss pixel (RGB, HSV, CMYK, etc) vs photo sites (sensel)
18:53
TofuLynx
thanks Bertl_oO
18:53
TofuLynx
Hmm what about the green channels, why is it 1 1 and 2 2?
18:54
TofuLynx
and why is Blue not 1 2?
18:54
BAndiT1983
https://www.researchgate.net/profile/Emanuel_Marom/publication/45709080/figure/fig1/AS:307400574816256@1450301416028/Typical-Bayer-Matrix-with-3-main-colors-in-the-RGGB-configuration-In-this-paper-each.png
18:54
BAndiT1983
look at the picture
18:54
supragya_
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18:55
BAndiT1983
we count from 0, so to get the red value, the algorithm starts at 1,1
18:55
se6astian
hey supragya and TofuLynx, what do you think of this task? https://lab.apertus.org/T1018
18:55
BAndiT1983
using diagonal cross for blue and red, but cross for green
18:55
se6astian
Would that be interested for any of you to do?
18:55
supragya_
Hi, is the znc setup? I am not able to connect using my nick
18:55
se6astian
Bertl_oO: dealt with ZNC afaik
18:56
se6astian
I will remind him
18:56
Bertl_oO
supragya_: let's take this private, it should work
18:56
se6astian
ah there you are :)
18:56
supragya_
Bertl_oO... Wait let me reconnect
18:56
TofuLynx
se6astian : I could help doing that task, surely. But not now, as I am short on time :)
18:57
TofuLynx
BAndiT1983 what green are you talking about?
18:57
BAndiT1983
TofuLynx, hope that gsoc is getting some of your attention
18:57
BAndiT1983
green, like green sensel ;)
18:58
TofuLynx
Oh wait
18:58
TofuLynx
I was thinking the other way
18:59
TofuLynx
hmm
18:59
TofuLynx
so, red starts a 1,1 makes sense.
18:59
supragyaraj
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18:59
TofuLynx
green1 starts at 1,1 -> cross ?
18:59
supragyaraj
Bertl_oO: I am here!
19:00
Bertl_oO
yay!
19:00
BAndiT1983
TofuLynx, yes, as it's the missing sensel in the middle
19:00
TofuLynx
ok
19:00
se6astian
TofuLynx: understood, supragya do you have more time currently?
19:01
BAndiT1983
bilinear debayer walks over unknown parts, that's why the offsets are in that way
19:01
TofuLynx
green2 is 2,2 -> also cross, correct?
19:01
TofuLynx
and finally blue is 2,2 -> diagonal cross, understood!
19:01
BAndiT1983
yep
19:02
BAndiT1983
stop, no
19:02
TofuLynx
ok
19:02
BAndiT1983
green is 1,1
19:02
BAndiT1983
you count starting with 0, not 1
19:02
BAndiT1983
*you start counting
19:02
TofuLynx
hmm?
19:02
TofuLynx
on the code G1 is 1 1 and G2 is 2 2
19:02
BAndiT1983
let me check
19:03
supragya_
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19:03
TofuLynx
and it makes sense for me, as the G1 is positioned on the blue sensel and G2 is positioned on the red sensel (in the bayer)
19:04
BAndiT1983
possibly it was done for processing more than one value
19:04
BAndiT1983
afraid to look into the commit history ;)
19:05
TofuLynx
Hmmm
19:05
TofuLynx
Okk, now the methods
19:08
TofuLynx
the BilinearFilterRed starts with a diagonal cross for the starting position, then goes 1 unit to the right and does top bottom and finally goes 1 unit down from the starting point and does the left right .
19:08
TofuLynx
makes sense
19:08
TofuLynx
I am starting to see why was I having difficulties with the algorithm
19:09
TofuLynx
My approach was to start the algorithm where I had the red Sensel, which is not correct
19:09
TofuLynx
feasible*
19:09
BAndiT1983
go for big data part first, then borders as last
19:10
BAndiT1983
some data has to be calculated through weighting, but we discussed it already earlier
19:11
TofuLynx
ok!
19:11
TofuLynx
now the method BilinearFilterGreen
19:12
supragyaraj
# relogging in
19:14
TofuLynx
Thanks for the explanation BAndiT1983 !
19:14
BAndiT1983
no problem
19:14
BAndiT1983
we can make this loops simpler, but hopefully without much performance loss
19:15
BAndiT1983
was some naive approach, but nested loops could slow down also
19:15
TofuLynx
we could also have a variable for _size - _width
19:18
BAndiT1983
yep, everything which could be pre-calculated should be extracted
19:18
BAndiT1983
*that
19:19
TofuLynx
case BayerPattern::RGGB:
19:19
TofuLynx
_patternOffsets[0] = _width + 1;
19:19
TofuLynx
_patternOffsets[1] = _width + 1;
19:19
TofuLynx
_patternOffsets[2] = (2 * _width) + 2;
19:19
TofuLynx
_patternOffsets[3] = (2 * _width) + 2;
19:19
TofuLynx
break;
19:19
TofuLynx
Is this correct?
19:20
BAndiT1983
you have to give me more hints, what is this snippet about?
19:20
TofuLynx
it's about initializing the patternoffsets
19:20
TofuLynx
that specify the starting points for first missing pixel of each color
19:21
BAndiT1983
if you use it for single loop, then it should look more or less like this, at least at first glance
19:22
TofuLynx
Yeah
19:35
supragyaraj
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19:40
supragya
test 123
19:41
BAndiT1983
works
19:41
Bertl_oO
yeah, but that was me testing the account :)
19:47
TofuLynx
BAndiT1983:
19:47
TofuLynx
Remember the pattern issue I had with the samples?
19:48
BAndiT1983
which ones?
19:49
TofuLynx
When I open the sample, it is noticeable RGGB, but the OCimage says it's GBRG. And when I force running with RGGB offsets, the output is correct.
19:49
BAndiT1983
yes
19:50
TofuLynx
It's still happening, I have to do the unit test to conclude for once and all if it's a issue with my algorithm or with the TIFF loader or with the sample
19:50
BAndiT1983
sounds good
19:50
TofuLynx
Did it happen to you in the past?
19:53
BAndiT1983
haven'T noticed, but maybe test DNGs were almost always RGGB or something like that
19:55
TofuLynx
okk! I will go dinner now!
19:55
TofuLynx
I will be back soon
19:56
BAndiT1983
have a nice meal
20:01
supragya
znc test again
20:22
BAndiT1983
changed nick to: BAndiT1983|away
20:33
BAndiT1983|away
changed nick to: BAndiT1983
20:33
tjstyle
Hi all..
20:33
BAndiT1983
hi
20:34
tjstyle
just joined, because I'm very interested with this project.
20:34
BAndiT1983
any specific area?
20:35
tjstyle
I have some skill in hardware and software development.
20:36
tjstyle
hardware in embedded, but mostly in ARM, not FPGA.
20:36
BAndiT1983
you can start at lab.apertus.org, if you haven't visited it yet, to get some overview of current hardware tasks
20:36
BAndiT1983
and Bertl_oO is the right person to ask, as he is the hardware supervisor
20:37
Bertl_oO
hey tjstyle!
20:38
tjstyle
yes, just playal around there and I'm interested for adding IMU & GPS stuff in empty slot behind image sensor board.
20:38
tjstyle
Hi Bertl_oO !
20:39
tjstyle
and for all, sorry for my poor english language.
20:39
BAndiT1983
no problem, we are mostly not-native speakers here
20:40
Bertl_oO
well, we created the first IMU CSO (center solder on) module recently
20:40
Bertl_oO
so the hardware should be there, just missing software ... which doesn't mean that you might not create your own design for that
20:41
tjstyle
oh, so the IMU hardware was exist.
20:42
Bertl_oO
yes, a first version was designed and populated a few days ago
20:42
Bertl_oO
let me dig out the details for you if you are interested
20:43
tjstyle
that info was available in the wiki?
20:43
Bertl_oO
the wiki always lacks a little behind, but let me check too
20:44
tjstyle
ok then, please give some detail about existing IMU CSO board.
20:45
Bertl_oO
the wiki lists the chips we are using, but doesn't have a design liked yet
20:45
Bertl_oO
https://wiki.apertus.org/index.php/Beta_CSO
20:46
Bertl_oO
the development progress page is missing any information it seems :/
20:48
Bertl_oO
http://files.apertus.org/HARDWARE/AXIOM/BETA/CSO/
20:48
Bertl_oO
here are the two CSO modules we have designed so far
20:48
Bertl_oO
the IMU one is obviously the one we are talking about :)
20:52
tjstyle
IMU is connected to FPGA?
20:53
tjstyle
so I can't do anything in software side :(
20:54
Bertl_oO
well, yes, it is connected to the MachXO2 interface
20:55
Bertl_oO
which is the only one for the CSO
20:55
Bertl_oO
but it can be mapped (at least for testing) to the I2C bus on the ZYNQ arms
20:55
Bertl_oO
i.e. it can be accessed via I2C or SPI from the zynq PS side
20:56
TofuLynx
Hello BAndiT1983 I am back
20:57
BAndiT1983
changed nick to: BAndiT1983|away
20:57
Bertl_oO
tjstyle: so what IMU CSO setup did you have in mind for the AXIOM Beta?
20:59
tjstyle
was play with much IMU chips in drone world, so have some knowledge for what a good chip for certain need.
20:59
BAndiT1983|away
changed nick to: BAndiT1983
21:00
BAndiT1983
TofuLynx, any new questions?
21:00
tjstyle
what in my mind is something like existing IMU CSO board, but with adding a GPS module.
21:01
tjstyle
IMU CSO only have SPI & I2C interface?
21:02
Bertl_oO
the CSO area has basically 4 voltage and 2x4 GPIOs which can be used as you like
21:02
tjstyle
almost all good GPS chips that I know is using uart protocol
21:03
Bertl_oO
in the IMU CSO I used the SPI interfaces, but left resistors on the GPIOs so that you can rewire it for I2C/IRQ for example
21:03
TofuLynx
None yet. it's going well :)
21:03
TofuLynx
I just have to investigate the pattern issues from the samplse
21:03
TofuLynx
samples*
21:03
Bertl_oO
tjstyle: the problem with GPS on the CSO is that you are in a really bad spot for an antenna
21:03
Bertl_oO
so for that I would suggest to use the SHIELD interface instead
21:04
Bertl_oO
we did one for the ESP32 module and a similar setup might work well with a GPS module
21:04
Bertl_oO
http://files.apertus.org/HARDWARE/AXIOM/BETA/SHIELDS/
21:06
tjstyle
oh yes, that will be more good spot for placing GPS shield.
21:07
Bertl_oO
so maybe work on a GPS shield then instead of a CSO IMU :)
21:09
tjstyle
in existing CSO IMU there is air pressure sensor, I think that will more accurate if placed in shield
21:10
Bertl_oO
we haven't tested it yet, it might be true but we'll see
21:10
tjstyle
just saving money everyday for can buy a Beta Devkit :D
21:11
Bertl_oO
there shouldn't be too much difference between CSO and SHIELD are regarding pressure
21:11
Bertl_oO
what I fear is that any enclosure with a fan will seriously mess with the barometric sensor
21:11
Bertl_oO
but as I said, we haven't tested it yet
21:12
tjstyle
so I can more depth for contributing in this project.
21:13
Bertl_oO
did you manage to get a voucher?
21:14
tjstyle
what voucher?
21:14
tjstyle
not yet have info about that
21:15
Bertl_oO
during crowd funding (and shortly after), there was an option to get a voucher for an AXIOM Beta devkit at cost
21:15
BAndiT1983
Bertl_oO, what about heat pipe, so the fan can be put elsewhere?
21:15
BAndiT1983
or peltier element
21:16
tjstyle
I was late for that, I just found this project after crowd funding was over.
21:16
Bertl_oO
yeah, heat pipe is a good idea for a metal case, peltier is really power hungry as general cooling system
21:17
Bertl_oO
tjstyle: yeah, that's unfortunate ...
21:17
tjstyle
are available option to buy separately per board?
21:18
tjstyle
like I will find microzed locally, then buy a power board, main board, etc.
21:19
Bertl_oO
yes, definitely
21:19
Bertl_oO
and you can always build those boards yourself if you have some soldering skills
21:20
tjstyle
the hardest part is to buy CMV12000 sensor board. ha..ha..
21:20
Bertl_oO
yes, that with the sensor is definitely the most expensive part
21:20
tjstyle
yes, I have skill in there
21:21
tjstyle
also now I assembling my handmade product.
21:22
tjstyle
https://usercontent.irccloud-cdn.com/file/YEWhyqHF/irccloudcapture3052853509589572847.jpg
21:22
Bertl_oO
nice
21:28
tjstyle
just found the price for each board in wiki, so I can choose what I can built by myself and what I need to buy
21:43
TofuLynx
left the channel
21:46
Bertl_oO
in any case, we might be able to provide some remote hardware for testing or similar when you are contributing to the project
21:52
tjstyle
thank you for that.
21:54
tjstyle
will more learn from wiki and labs for what part that I can optimally cotribute without devkit in my hand.
21:54
Bertl_oO
no probem, and if you have any technical questions, just ask me here on IRC
21:55
Bertl_oO
(will read up and answer in any case)
21:55
TofuLynx
joined the channel
21:56
TofuLynx
BAndiT1983:
21:56
TofuLynx
I noticed a "issue"
21:56
Bertl_oO
tjstyle: btw, what are the ARM boards for?
21:57
tjstyle
in the board photo above?
21:57
TofuLynx
basically, the sample's green1 sensels are darker than green 2
21:57
Bertl_oO
tjstyle: yep
21:57
TofuLynx
so it has artifacts on the green channel
21:57
TofuLynx
is it normal?
21:57
tjstyle
that is portable audio player, I use for main processor.
21:57
Bertl_oO
looks like an audio board
21:58
Bertl_oO
ah, okay, tx :)
21:58
TofuLynx
Bertl_oO : My question probably applies to you too, is it normal that green1 sensels are darker than green2?
22:00
Bertl_oO
they shouldn't be, but it might be the result of dark frame correction or similar
22:00
TofuLynx
Do you know a dng sample of axiom that is okay?
22:00
Bertl_oO
we currently use a rows/cols correction for that which might affect G1 differently than G2
22:01
Bertl_oO
no, but if you ask se6astian nicely he might be able to take a snap with all the stuff turned off
22:01
Bertl_oO
(in the next few days or so)
22:02
TofuLynx
Oh Okay, thanks
22:02
Bertl_oO
personally I don't think there should be any big difference because of how the sensor and color filter come together
22:03
Bertl_oO
monochrome and color sensors are basically identical and it would be weird if the sensel had different sensitivity based on row/col locations
22:03
TofuLynx
Hmm okay
22:03
Bertl_oO
it would also be weird to have different filters for G1 and G2
22:03
Bertl_oO
but you never know for sure without testing :)
22:03
TofuLynx
well the green1 sensel would by some reason be different to green2 for more range or something, no?
22:04
TofuLynx
as in, adjusting the sensibility
22:04
TofuLynx
but i am no hardware expert :)
22:04
Bertl_oO
we should have a complete remote beta available at the hub shortly too
22:04
Bertl_oO
so you probably can take your own snaps and play with all the various parts
22:05
BAndiT1983
TofuLynx, probably some mistake in calculation
22:06
TofuLynx
I don't think that is that. I have inspected thorougly and debugged
22:06
TofuLynx
and with the debayer off I can notice that green1 sensels are darker
22:06
TofuLynx
I will debug it more
22:07
BAndiT1983
hm, try to load the image in exiftool
22:07
BAndiT1983
maybe there are some tags with related settings, can't say for sure, cause this thing is full of surprises
22:08
BAndiT1983
first probem is, that we play around with converted data, so the problem can also be there
22:08
Bertl_oO
it should be easy to split the raw12/raw16 into four images and check them against eachother
22:08
BAndiT1983
this would be also a good test
22:09
TofuLynx
CFA Repeat Pattern Dim : 2 2
22:09
TofuLynx
CFA Pattern 2 : 1 2 0 1
22:09
TofuLynx
what is this?
22:11
tjstyle
Bertl_oO: I'm not very know about FPGA, CSO signal path is go to Lattice chip, Lattice is a router. so what actually comunicated with CSO is the Zynq chip?
22:12
Bertl_oO
yes, kind of, the MachXO2 (Lattice) is used as a routing fabric, so you have several options there depending on the configuration
22:12
TofuLynx
@BAndiT1983 how do I interpet CFA Pattern 2 ?
22:13
Bertl_oO
tjstyle: it is a full featured FPGA (the MachXO2) so you can (pre)process the data from/to the CSO there
22:13
BAndiT1983
don't know, as i said, there are many additional tags, but don't know if they are required
22:13
Bertl_oO
it also has some conenctions to the Zynq (Xilinx FPGA) which can be used for communication
22:13
BAndiT1983
repeat pattern is probably the size of 2x2
22:13
BAndiT1983
and pattern 2 is GBRG
22:14
tjstyle
what language that used for comunicating with IMU via SPI / I2C? VHDL? or in Linux level?
22:14
Bertl_oO
tjstyle: so one way would be to pre process the IMU data in the MachXO2 and then send metadata packets to the ZYNQ
22:14
TofuLynx
How did you get GBRG from 1 2 0 1 ?
22:14
TofuLynx
I cannot find any material regarding that
22:15
BAndiT1983
RGB, R = 0, G = 1, B = 2
22:15
tjstyle
ah ok, got it.
22:15
TofuLynx
Hmm makes sense
22:15
TofuLynx
so the sample as the wrong pattern
22:15
Bertl_oO
for both FPGAs (Zynq and MachXO2) VHDL is required, but for testing this code can be as simple as directly connecting some wires to the Zynq PS (ARM cores)
22:15
TofuLynx
has*
22:15
Bertl_oO
at which point it becomes 'Linux level'
22:15
BAndiT1983
https://www.adobe.com/content/dam/acom/en/products/photoshop/pdfs/dng_spec.pdf -> page 23, very interesting
22:16
BAndiT1983
sorry, page 34
22:16
BAndiT1983
bayergreensplit
22:16
BAndiT1983
TofuLynx, maybe i'm wrong and they calculate it as BGR
22:16
Bertl_oO
tjstyle: there is a GSoC task which deals with an advanced communication protocol between MachXO2 and Zynq to simplify this
22:17
Bertl_oO
https://lab.apertus.org/T731
22:17
BAndiT1983
https://www.awaresystems.be/imaging/tiff/tifftags/privateifd/exif/cfapattern.html
22:17
tjstyle
ok thanks.
22:18
BAndiT1983
TofuLynx, can it be, that the pattern is set fixed in the loader?
22:18
TofuLynx
You are not wrong
22:18
TofuLynx
CFA Pattern : [Green,Blue][Red,Green]
22:19
BAndiT1983
see the last link i'Ve posted, there are more
22:19
BAndiT1983
you should also bookmark the page, as the info there is very important when dealing with TIFF/DNG
22:19
BAndiT1983
we don't need all the tags, as there is also too much info
22:20
TofuLynx
Bookmarked!
22:20
BAndiT1983
https://www.awaresystems.be/imaging/tiff/tifftags/search.html?q=cfa&Submit=Find+Tags
22:20
TofuLynx
Hmm if the sample has the wrong pattern in the tag, why did that happen?
22:21
BAndiT1983
which pattern does the preprocessor receive?
22:21
TofuLynx
the same as exif, GBRG
22:21
BAndiT1983
ok, does it call the right patern assignment block?
22:21
TofuLynx
yep
22:22
TofuLynx
I dont think there is any issue with OpenCine
22:22
BAndiT1983
https://www.awaresystems.be/imaging/tiff/tifftags/cfaplanecolor.html
22:22
BAndiT1983
try to load the file in darktable, for example, just to see if it comes up correctly
22:22
TofuLynx
darktable?
22:23
BAndiT1983
or rawtherapee, two open source raw photo tools, like lightroom
22:23
TofuLynx
ok!
22:23
BAndiT1983
https://www.darktable.org
22:24
BAndiT1983
darktable is just an opposite of the light table, which is used by photographs and pre-print companies
22:25
TofuLynx
with darktable the sample seems Ok, but with a profile (linear Rec709)
22:26
TofuLynx
without any profile, it's has a magenta hue to it
22:26
BAndiT1983
rec709 is for HD data, seems ok
22:26
BAndiT1983
that's normal, at least for now, as the conversion has some problems, maybe we can fix it later
22:27
Bertl_oO
when it shows up pink, the rows are in the wrong order
22:28
Bertl_oO
i.e. the dng conversion didn't use the correct RG/GB pattern because even and odd rows were swapped
22:28
Bertl_oO
note that this _will_ cause G1 and G2 to differ significantly :)
22:29
TofuLynx
so, do you think that the sample does have in fact a wrong pattern?
22:29
Bertl_oO
(i.e. GB/RG result in B and R being the same while G1 and G2 differ)
22:30
TofuLynx
Bertl_oO , can I send some prints?
22:31
Bertl_oO
you mean images? if so, just upload them to some (free) upload service
22:32
Bertl_oO
(and paste me the url here or in private)
22:32
TofuLynx
Yeah
22:33
se6astian
changed nick to: se6astian|away
22:33
TofuLynx
https://imgur.com/a/ZyOjrZk
22:33
TofuLynx
here is it
22:34
TofuLynx
The original and the Rec709
22:35
Bertl_oO
that looks like swapped lines :)
22:35
Bertl_oO
compare R and B channel, they should be practically identical
22:36
Bertl_oO
(which is because they are actually G1 and G2 :)
22:37
TofuLynx
they dont seem that identical
22:38
TofuLynx
how do you suggest to compare?
22:38
BAndiT1983
are any channels identical?
22:38
TofuLynx
Blue and Green Channels are similar in the darktable
22:39
TofuLynx
with a small offset between them
22:39
TofuLynx
I have to go now. Tomorrow I will continue this :)
22:39
Bertl_oO
DNG stuff is really weird, I avoid it wherever possible :)
22:39
TofuLynx
xD
22:40
TofuLynx
See you tomorrow!
22:40
TofuLynx
left the channel
22:42
BAndiT1983
Bertl_oO, DNG can be used/generated also in simple way, but for some reason it's not always the case
22:44
BAndiT1983
changed nick to: BAndiT1983|away
00:50
futarisIRCcloud
joined the channel