#apertus IRC Channel Logs

cool, yes I will dig them out for you

morrigan still did not fix the ssl cert error unfortunately

ssl should be fixed

e.g. as csv?

https://automeris.io/WebPlotDigitizer/

anuejn: interesting, why the cutoff at 700nm?

interesting

anuejn: se6astian: this is what you get if you use the matrix obtained this way to actually reproduce the color checker:

https://f.coroot.de/cmv12k_color_response/color_checker_D65.pdf

it seems like a simple matrix based calibration / correction will not really work / be a bit unsatisfactory

this is generated purely from the image sensor response curve + uv/ir filter spectral curve?

though a hard cutoff at 380nm and 730nm is assumed

(but a cutoff at these wavelengths is "standard" according to wikipedia)

will forward to max soon so he can capture more samples

MEETING TIME, who is here?

any news Bertl?

yes, I have some news to share (besides the meeting with mustafa_ :)

the LAM/INT project is currently hitting the hot/final phase, and I've been spending some quality time to get everything working there

great!

it is a simple python implementation for now but should probably be moved to C or Rust in the future and also made a realtime process

at least on the 4 port HDMI card we do not have any problems capturing the full bandwidth we can output on the Axiom Beta

that said, I'm still hacking on it and I'm kind of optimistic that we will get that working this week

right

is part of the LAM project to also document the solution and prepare the tools for github?

I'm pretty sure we need to cover that

Hi guys, I have started working on the new MYIR module integration for the sensor, I am preparing the first draft pin mapping of differential pin mapping to connector pins at the moment

great to ahve you here mustafa

se6astian: yeah, will try to take care of that once the LAM/INT project is finished

for context: mustafa_ is designing a baseboard or carrier board for the MYIR ultrascale family with image senor board connectors as well as high speed plugin module connectors, to allow us to evaluate the xilinx ultrascale as next gen platform with actual data input and output streams as we use them

yes http://www.myirtech.com/list.asp?id=612

thanks, was just about to ask which base board is being used

BAndiT1983_ do you also have some news for us?

vup/anuejn I see lots of progress from you here and on github, can you give us a brief summary as well?

am using our PCB paneliser script as playground for pyqt too, for a WYSIWYG UI, is coming along nicely too, will show screenshots next week maybe, if nothing comes in-between again

*regarding the size of pyqt vs pysimplegui, former was smaller when packed with pyinstaller into single file, but even the folder with all dependencies was much smaller too

many thanks BAndiT1983_!

quick updates from my side: handed over first colorchart to max last week and picked up more charts and high CRI LED lights today to hand over to max soon s he can capture more snaps for ryan

well mostly anuejn has been working on some color science stuff, I just played around with it a bit aswell

(which obviously depends on the lighting / illuminant setup)

we started of using a simple linear transformation (ie a 3x3 matrix) that minimizes the sum of quadratic distances between the resulting transformed sensor pixel values and the expected XYZ color values for the color patches

for two different illuminants one can see a comparison between the "correct" color and the color we can obtain from the sensor using such a linear transform here:

https://f.coroot.de/cmv12k_color_response/color_checker_D65.pdf

for one the euclidian distance in XYZ color space doesn't really map well to preceptual difference, so instead of optimizing this in XYZ space one could choose for example Luv so that hopefully the "color differences" that are optimized match more closely the human perception

https://f.coroot.de/cmv12k_color_response/color_checker_A_luv.pdf

especially those ones that still preserve exposure independence

improves matters a bit more

note that this is was just some basic playing around, so there might still be some errors in these plots

furthermore, it would be interesting to actually use these color transformations for a real image an check if they actually work for those

very nice progress!

ok then, many thanks everyone, very happy to see so many things happening in parallel! way to go! MEETING CONCLUDED

se6astian: does max have any lights / illuminants with know spectrum?

nice

not yet

which is a major improvement compared to the current color matrix (stolen from a1ex's raw2dng) which does not look "correct"

this seems to work good and we will hopefully merge this soonish

Bertl, mustafa_: what made you choose the myir board over the kira one for that prototype?

se6astian: can I publish that pdf to github or would you not like that?

we want to evalaute both kira and myir

but IIRC the main concern with the Kira was the lack of IO for all sensor LVDS lanes

If you have a spare kira prototype board I would be happy to test it :D

if you bring bertl a cake he might assemble 3 :)

:P

but I fear Bertl would need to fetch it ;)

anuejn: well let's hope the cake isn't a lie! :)

and yes, the main reason to go with the MYiR first is that we should not have any trouble with full sensor board connections

i see

on what does it depend if that is possible?

what kind of movie promotion have you come across which fall in gray area (not ethical or unethical)?

cast n crew talk about movie before movie release

?

hm... no i do not have any buiseness with that

now we have a number of other GPIOs which might be suitable for the task if used properly, but we have to investigate this first

anuejn: did some investigations regarding K26 SOM and it doesn't look good for full sensor connection (at least for the CMV12k)

and HD also does not provide any delay elements or buffers