#apertus IRC Channel Logs

morning folks!

Good Morning!

Hey supragya!

(afternoon in europe)

have meeting today... prepping for it

meeting about what? anything important?

Hope you have fun!

Meeting is tomorrow right?

don't worry,

okay :-)

I didn't understand what you meant with this: "what about bilinear debayer for the blue channel, in our rggb example, which interpolates top, left and center sensel at once? then we would do everything in one pass, possibly multiple threads for performance. btw. the threads have to be in some distance from each other to avoid interference"

but, how do you interpolate the blue channel for the border, while avoiding jagged lines?

hi supragya

BAndiT1983: I did in_memory emulation of the recorder to actually see how much perf we can get.. The very basic emulator was capable of having a throughput of about ~7500 frames per second

given a 4xSSD in RAID 0, we can expect somewhere around (x10 factor) ~750 frames of recording possible...

supragya: don't forget that a PC and Zynq are totally different at thatz

given that zync is capable of throughput anywhere below 750 frames per sec, we would be able to handle on recorder end

yep. But how can I do that in such a way that's universally applicable, with just offsets?

the stream given off by Beta in emulation was a simple fs (that's how it would look like when mounted through USB3, right?) and was programmed to give off as speedily the data as required.

TofuLynx: you should process it like in downscaler and such, as a block of 2x2 or possibly 3x3

always the last value, if R or B

what do you mean by top and left value?

first value of B is at diagonal cross at 2,2 , so you need to calculate top and left values from available ones, ah and also right one, forgot about it

sorry, can't do 2 things at once, trying to get the tax declaration done

no problem!

oops

forgot to say that I mean that would happen when on BGGR pattern

so

just on cases and their starting points/ offsets

add calculation for top and left for now

uuh

I dont know how xD

hmm

Oh well xD

by doing the blue channel as top and left and center

yep, or red channel, this are special cases, then this ones are at the end of the pattern, as end i mean like RGGB or GBBR

what happens in the mirror patterns, aka GBRG or GRBG?

G has more data available, so interpolation is rather simple,

yeah, for now I am doing simple weighting (dividing by four)

Can you tell me, what pattern does axiom uses in fact?

depends on the sensor

don't know if it is always the same pattern

depends on ordering too... if mirrored frames (bottom-up DIP), we get GBRG

last row => first row and so on

Ok!

it's the conversion, look for raw2dng in the apertus repos

hmm

https://github.com/apertus-open-source-cinema/misc-tools-utilities/tree/master/raw2dng

okk

but beware, a lot of code is in the source

But it's something that has definitely to be investigated

yes

probably it has additional info, like linearization table

which pattern is recognized?

It's recognized as GBRG

I will try it

nevermind, did already some days ago, getting old :D

image has pink tone, so green is diminshed and the skin is totally pink

also on OC the two green sensels have significantly different values, which introduces a grid artifact effect

we should investigate it,l but if pattern is not correct, then this would explain different green values

TofuLynx: you have got exif info, was there something else related to CFA or channels?

before we change code, get some DNG images from the web, which we can use for testing

CFA Pattern 2 : 1 2 0 1

ah, it's white balancing, if you set it to manual and drag a small rectangle on her shirt, then the image turns more natural

i downloaded the beach picture on the page you sent

I will send a picture

do you see those vertical dark columns?

yep, probably preprocessor isn't handling this pattern yet

So, should I keep doing the bilinear Debayer with unit tests?

doing the same for daemon at the moment

Will be afk for a moment, I will eat something

hi again supragya

reminds me of the old french movie fantomas :D

hey supragya_

not me BAndiT1983!

*(bad phrasing of sentence)

BAndiT1983

Bertl_oO: and whats the volteage range/ rules for VCC and VCC_IO on the shields?