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#apertus IRC Channel Logs

2020/03/09

Timezone: UTC


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comradekingu
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09:16
BAndiT1983|away
changed nick to: BAndiT1983
09:17
Bertl_oO
off to bed now ... have a good one everyone!
09:17
Bertl_oO
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BAndiT1983
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pratyush
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HEGAZY
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pranabendra
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15:25
Bertl_zZ
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15:25
Bertl
morning folks!
15:31
HEGAZY
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16:00
pranabendra
Hello, I am Pranabendra Prasad Chandra from India, studying Electrical Engineering in 4th year. I have experience in working with 8051 and AVR (Arduino boards) microcontrollers. I am interested to apply for T1126 - AXIOM Remote: Firmware improvement and extension
16:01
pranabendra
I am working on the qualification task T1162, and have a doubt - The icon image being 1-bit depth, is it necessary to store it in an 8-bit array? Or can we use STL and store it in bitset?
16:01
HEGAZY
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16:02
Bertl
hello preetimenghwani[!
16:02
Bertl
you do not 'have a doubt', you 'have a question' :)
16:03
Bertl
and BAndiT1983|away will try to answer that one once he gets back ...
16:18
pranabendra
Thank you
16:19
HEGAZY
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HEGAZY
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BAndiT1983|away
changed nick to: BAndiT1983
16:34
BAndiT1983
hi pranabendra, the goal is to reduce the flash memory usage as we don't need to have full colour icons, could you create a comparison between array and STL?
16:34
BAndiT1983
don't forget that the task is meant for a pic32, so the things have to be slim and fast
16:37
Bertl
bonus points when you get everything (code and data) to be smaller than the raw data? :)
16:40
se6ast1an
meeting in 20 minutes
16:57
Fabian9
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17:00
se6ast1an
meeting time!
17:01
se6ast1an
hi Fabian9!
17:01
se6ast1an
who is here?
17:01
Fabian9
Hi!
17:01
Bertl
is here ...
17:01
BAndiT1983
am here
17:02
se6ast1an
great, maxime promised to attend today as well
17:02
se6ast1an
so he should turn up soon
17:02
Bertl
yay!
17:03
max_bxl
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17:03
max_bxl
hello everyone!
17:03
se6ast1an
hello!
17:03
BAndiT1983
hi
17:03
Bertl
there he is!
17:03
se6ast1an
good timing
17:04
se6ast1an
since you have to leave again maxime, do you want to start?
17:04
se6ast1an
by 18:30 iirc?
17:04
max_bxl
as I said to sebastian, I'll be there until ~6:30pm
17:04
max_bxl
yep
17:04
se6ast1an
great, please start
17:04
max_bxl
so, we resume the AXIOM clubs with Bertrand
17:04
max_bxl
(and a new guy, Adrien, who come from the same cinema school)
17:05
max_bxl
and, as we discussed with Sebastian in feb, we are going to use the Beta for time-lapse recordings and stop-motion animation movie shooting
17:06
max_bxl
Bertrand already took his camera to the fine art academy where he teaches video
17:06
max_bxl
and, with the help of a little script we crote during previous AXIOM Club, the students manage to make 92 frames of a simple animation shot!
17:07
max_bxl
here the result : https://cloud.diaphragme.be/s/gAiKeHRmdMBCiwA [Ambr0s!@]
17:07
max_bxl
!
17:07
max_bxl
as you can see, the folder is called Ambrosia, the idea being that we try to ignite this idea of Sebastian !
17:07
BAndiT1983
nice and some hands are there too ;)
17:08
max_bxl
to be noticed : his students are total newbees in the art of stop motion !
17:09
max_bxl
(and I intend to do the same with my own students, which are studying stop motion at La Cambre, a fine art school for future art professionnals!)
17:09
Bertl
very nice!
17:10
max_bxl
so, the script was converting the raw12 in PNG images (for the ease of a studentproof postproduction workflow on KDENlive)
17:10
Bertl
what 'features' do you think would be great to have for this kind of art (i.e. stop motion)
17:10
max_bxl
and we had issues with the color because we were using the line in the wiki using IM convert
17:11
se6ast1an
reference: https://lab.apertus.org/T1164
17:11
max_bxl
thx!
17:12
max_bxl
it worked for the scope of his workshop, but we are now looking into another workflow to get accurate color in PNG or something else
17:12
se6ast1an
how far did you get with ufraw/dcraw?
17:12
max_bxl
(he's trying to use only FLOSS, so the ability of Davinci Resolve to read DNG image sequence is not an option for him, but will probably be for me)
17:13
Bertl
btw, adding -define sample:offset=0 should make it work again
17:13
max_bxl
in the Ambriosa folder, you can also look at a sample that I debayered with dcraw
17:13
max_bxl
(the image00044.TIFF, and/or the jpg I converted from that)
17:14
se6ast1an
I dont see any tiff in the folders
17:14
max_bxl
it's command line and super efficient, but hard to master since dcraw doesn't do color temperature/tint based correction, but something else
17:14
max_bxl
let find the man page
17:15
max_bxl
-r mul0 mul1 mul2 mul3 Specify your own raw white balance. These multipliers can be cut and pasted from the output of dcraw -v.
17:15
se6ast1an
in ufraw you can manually develop one raw file and then save the preset to process more raw files from the commandline IIRC
17:15
max_bxl
will investigate it !
17:16
max_bxl
I just dig into dcraw because I read online it was the quickest FLOSS raw debayerer
17:16
se6ast1an
well if you wait 0.5 or 0.7 seconds is probably not a big deal :)
17:17
max_bxl
there's also a way to do it GUI with darktable
17:17
max_bxl
which considerably easier, but take more time to batch process (yet)
17:17
max_bxl
anyway
17:18
max_bxl
I was wondering who worked on color calibration so far, in order to get in touch with him/her to go further without re-inventing the wheel!
17:18
se6ast1an
alexML: you here?
17:18
se6ast1an
intracube: ?
17:18
max_bxl
and also I might come and ask soon what raw2dng do (more specifically how it do it !)
17:19
max_bxl
that's for me !
17:19
se6ast1an
great progress, many thanks!
17:19
max_bxl
we are going to re-do AXIOM club every two weeks or so, and invite Oscar asap!
17:19
se6ast1an
perfect
17:19
se6ast1an
any news on the promo material printing front yet?
17:21
max_bxl
nope, unfortunately, we're nowhere on this front
17:21
se6ast1an
btw max started this tutorial a long time ago, maybe that would be a good way to document all the things around capturing and processing still images with the beta: https://docs.google.com/document/d/1-kFjebwvUg3e8jLKwXSemBWsNIL6_P-NPFUXbv7-jmk/edit#heading=h.p0drc1axbzga
17:21
pratyush
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17:22
se6ast1an
in the future
17:22
se6ast1an
right, anything else to add maxime?
17:23
se6ast1an
otherwise we are right on time for you to leave by 6.30
17:23
max_bxl
will do
17:23
se6ast1an
BAndiT1983: any news to report?
17:23
max_bxl
*read !
17:23
BAndiT1983
yes, a bit
17:24
se6ast1an
great, please share
17:24
BAndiT1983
started to straighten out the painter code, as the origin of drawing was moved to top-left, as some questions arose lately, it was done for performance reasons and hardware structure
17:24
BAndiT1983
have posted a diagram of that before, so want repeat myself, it's somewhere in the logs
17:25
BAndiT1983
awaiting challenge code from students, before the evaluation starts, also proposals should trickle in soon
17:25
pratyush
bertl: for checksum we will use should i parity word
17:25
Fabian9
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17:25
pratyush
*should i use parity word
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Fabian
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17:25
BAndiT1983
bootloader is also not forgotten, but i've to postpone most stuff till i'm fit again, but flashing pic16 is the obvious step
17:25
BAndiT1983
that's it from me
17:25
Bertl
pratyush: you might not have noticed, but we are in our weekly meeting
17:26
pratyush
oh i am sorry to interrupt
17:26
se6ast1an
thanks BAndiT1983
17:26
se6ast1an
Bertl: anything you want to share?
17:26
Bertl
sure
17:27
Bertl
I've spent most of my time on GSoC prepartions in various ways
17:28
Bertl
first, we have to get our remote setup (zbox, partial beta, etc) up and running for GSoC in a reliable way
17:28
Bertl
then, as there is plenty of interest in 'remote' tasks, we decided to do another round of AXIOM Remote prototypes
17:29
Bertl
those are not really a new design, but be enhanced the design to be able to remote control the remote
17:29
Bertl
so hopefully we will soon have a remote remote :)
17:30
Bertl
this was basically done by adding pads on the PCB to connect to the fully assembled AXIOM Remote as can be seen here:
17:30
Bertl
https://644db4de3505c40a0444-327723bce298e3ff5813fb42baeefbaa.ssl.cf1.rackcdn.com/8bec86edbcde6d5c021249a977852f75.png (pads on on the borders)
17:30
Bertl
and by addind a separate PCB to connect those ...
17:31
Bertl
https://644db4de3505c40a0444-327723bce298e3ff5813fb42baeefbaa.ssl.cf1.rackcdn.com/14f6c1cd7544f7783f6c796cabbf7fdd.png
17:31
Bertl
which then goes to an AXIOM Beta shield to remote control the buttons and dials:
17:31
Bertl
https://644db4de3505c40a0444-327723bce298e3ff5813fb42baeefbaa.ssl.cf1.rackcdn.com/1ff5e963a8839691c0ddb598e35687d9.png
17:31
max_bxl
ok gotta go, sorry!
17:32
Bertl
have fun! cya!
17:32
max_bxl
thx everyone!
17:32
se6ast1an
bye maxime
17:32
max_bxl
left the channel
17:32
Bertl
PCBs have been received (last one got in right before the weekend) and the parts are here as well, so assembly will be started pretty soon
17:33
Bertl
on the power board side, I did a lot of testing and it's basically good news
17:34
Bertl
just to remind you, the design is for two rails with 5V/3A each, for input voltages between 6 and 17V
17:35
Bertl
testing without any forced air cooling (i.e. just sitting on the table) gave that we can handle up to 2.2A on each rail
17:36
Bertl
but this is not really advised, as the regulators reach temperates above 100 degree celsius easily
17:36
Bertl
there is a thermal protection though, so even going over the limit will not make those parts desolder themselves :)
17:37
Bertl
with moderate air cooling and/or heat transport via skeleton, we can reach the full 3A per rail
17:38
Bertl
note that the current AXIOM Beta power requirements areless than 1.7A per rail even under heavy load/operation
17:38
Bertl
so I think we should be good there.
17:38
HEGAZY
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17:39
Bertl
Next step here is a fully assembled power board with the changes which I plan to do this week after preliminary testing the received PCBs
17:39
Bertl
The rest of the time I spent on testing Betas and reworking boards
17:40
Bertl
I think that's it from my side.
17:40
se6ast1an
great, thanks!
17:40
se6ast1an
vup/anuejn anything from your side?
17:41
se6ast1an
fabian any news?
17:42
se6ast1an
last week I asked about ways and places to adverize gsoc (universties, mailing lists, etc.) did anyone have any news ideas already?
17:42
Fabian
I'm still collecting references, trying to find out about the essentials of some rigs, but basically I'm mentally preparing for a hands on :)
17:43
se6ast1an
great, I asked more people about a stereo3d beamsplitter rig in vienna but so far nothing useful
17:44
Fabian
Ok, thx! My closest sources for rigs so far would be Munich and Budapest.
17:44
intracube
se6ast1an: yep, here for a bit.
17:46
se6ast1an
thanks Fabian, anything to add?
17:46
Fabian
That's all!
17:46
se6ast1an
thanks
17:46
se6ast1an
intracube do you want to share a summary of the color calibration you were working on ?
17:47
pratyush
left the channel
17:48
intracube
ok, just a brief overview as I haven't prepared;
17:49
intracube
I'm currently exploring methods to adjust and bake colour calibration LUTs
17:49
intracube
for now the adjustments are just by eye and using video levels/scopes for greyscale tracking
17:49
intracube
hopefully at some point proper measurements can be captured with proper calibration equipment
17:50
intracube
the second part is to take the adjustments (currently being made in Fusion/Resolve) and create a LUT + matrix which could be loaded onto the camera
17:50
intracube
or
17:50
se6ast1an
is the "basic camera matrix" embedded in a DNG ?
17:50
intracube
a 3D LUT which could be loaded onto an HDMI recorder
17:51
se6ast1an
or could be embedded (not sure we do it currently)?
17:51
intracube
I'm not familiar with the DNG format
17:51
se6ast1an
ok
17:52
se6ast1an
thanks, anything to add?
17:52
intracube
I think that's about it for now
17:53
se6ast1an
great
17:53
se6ast1an
quick update from my side:
17:53
se6ast1an
maker faire berlin has been cancelled because of the corona virus
17:53
se6ast1an
maker faire vienna is still scheduled
17:54
se6ast1an
new Team Talk episode is inbound: T15.3
17:54
se6ast1an
video done, reviews pending, article to be created
17:54
se6ast1an
https://cloud.apertus.org/index.php/apps/gallery/s/Pg5N59pGNGFcyND
17:54
se6ast1an
thats from todays glas filter cutting visit to the glazier
17:55
se6ast1an
he used a simple diamond glass cutter / groover?
17:55
se6ast1an
his cut was not perfectly straight but the glass didnt shatter
17:55
se6ast1an
and he even did it on a soft cloth table surface which is not optimal with such a small glas
17:55
se6ast1an
none the less it worked out fine for a test
17:56
se6ast1an
and he suggested to consider UV glue fo glueing the filter into the holder (glas on metal)
17:56
se6ast1an
will need to investigate, anyone with experience with such a glue?
17:57
se6ast1an
there are small updates to the shim layer designs
17:57
se6ast1an
https://cloud.apertus.org/index.php/apps/gallery/s/LqkCfTLRJYd9wFB#shim%20design
17:57
se6ast1an
see the captions of the images for details
17:58
Bertl
isn't that an UV filter?
17:58
HEGAZY
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17:58
se6ast1an
you mean we wouldnt be able to cure it? :)
17:58
Bertl
yeah
17:58
se6ast1an
good point :)
18:00
se6ast1an
based on the feedback collected at the equipment cafe, the cinemagear rental place nextdoor I redesigned some Compact Enclosure accessories like top handle and top support rods: not finished yet but here are some wip screenshots
18:00
se6ast1an
https://cloud.apertus.org/index.php/apps/gallery/s/jycWfbwpWYAwfJ6
18:00
se6ast1an
the idea is to use as much existing stuff as possible like bike handles which typically use a 22.2mm diameter tube
18:00
se6ast1an
and the NATO Rail system
18:01
BAndiT1983
sniper scope and laser sight also?
18:01
se6ast1an
if you need that why not ;)
18:01
se6ast1an
thats it from my side
18:03
se6ast1an
anyone else, otherweise meeting would be concluded
18:10
se6ast1an
meeting concluded, thanks everyone
18:10
Bertl
thanks for having us!
18:10
se6ast1an
my pleasure, now I need to run to the supermarket before it closes
18:11
Bertl
quick, to the supermarket!
18:22
BAndiT1983
somehow i can't avoid to see the image of seb cave, full of disassembled cameras
18:25
Bertl
and tons of stuff from the supermarket of course!
18:32
BAndiT1983
you mean empty wrappings ;)
18:35
pranabendra
BAndiT1983: I read about bitset in STL. If there aren't any bit level operations involved (flip, set,reset), using bitset will be inefficient. Also, in a 32-bit processor, it allocates memory in multiples of 4 bytes. So from memory usage point of view, an array of 1 byte data-type will be more efficient in this case
18:39
BAndiT1983
sounds reasonable and like the result i've expected
18:40
BAndiT1983
not everything which is comfortable for development will be efficient, but for image data plain array is the better solution, STL data storages can be also good but this also depends on the compiler and the environment it would be used
18:40
BAndiT1983
*where it would be used
18:50
Fabian
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pranabendra
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19:20
Bertl
pratyush: some kind of CRC is fine, even just summing up the bytes would be okay
19:20
Bertl
s/some/any/
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HEGAZY
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gsalazar
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HEGAZY
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gsalazar
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20:21
Bertl
off for now ... bbl
20:21
Bertl
changed nick to: Bertl_oO
21:28
HEGAZY
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21:52
BAndiT1983
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21:56
HEGAZY
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23:09
intracube
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intracube
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HEGAZY
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neeeck
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HEGAZY
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