#apertus IRC Channel Logs

good morning

hello dan!

Its a Saturday but I had a typical overnight 'how to' question worm in my head regarding raw2dng conversion

Good thanks, not goof :-)

gotta go to the supermarket

No problems I'll leave a couple of questions on here and see replies later on, thanks.

Questions are regarding the raw2dng processing, the DNGs and getting into the next stage of colour processing

and a good one to you too

RGB DNG I mean

How do I demosaic the RAW DNGs (with their magenta bias) to useable RGB versions to work onwards with.

And if that processing workflow is correct (snap.raw12 - DNG via raw2dng - demosaic and new RGB DNG debayered) can I debayer to Cineon Log/Log C for example :-)

there is a primitive script for ImageMagick which does a simple debayer to roughly full HD

for good debayering to 4k, check with alexML_ or getzingo (Max)

https://wiki.apertus.org/index.php?title=Axiom_Alpha_Software#Simple_debayer_with_ImageMagick:

Thanks I will try the simple version, it looks like it outputs to PNG like the preveiw, so I can ask alexML or Max for full 4K debayer to DNG or DPX as Loc encoded so I can go grading?

If ImageMagick can write DNGs, then yes, but I don't think so

I will have a play and see what it lets me create. or even Open EXR would be good, I will have a go mind. TIFFs is good for getting going.

Tried dng and cdng extension but no luck

There is a ML RAW 1.2.0 that does a DNG to 'Force Linear' as DNG but it can't read the raw2dng created via the snap.raw12 files. Still looking though.

i.e. you need to specify a color transformation on the data to have correct DNG

and that's the chicken-egg problem with real raw data

Also it seems ARC and others like RAWTherapee and Darktable aren't working with these dng files, dcraw and libraw I think are more used to ML created RAW files from their own software recording their RAW recordings from Canon cameras etc. AXIOM created DNGs via raw2dng still need that demosaic/debayer it seems (linear DNG) to be useable, but yes the correct colour transform needs to be there too.

best to chat with alexML_ regarding raw2dng for the Beta

Can I email alexML_ and Max for some feedback?

It may be more worthwhile posting on the Magic Lantern forum though.

Bert sent email to you, thanks.

this articel links to https://www.apertus.org/axiom-beta-uhd-raw-mode-explained-article-may-2016 , which i just don't know how to get via any menu on https://www.apertus.org/ is there a secret trick?

that article is not released yet :)

Well it is now but not by you facebook has it already too.

This is really great news, so many HD-Recorder can now record 4k Raw

most max out at 1080p30

i.e. you can record two 1080p30 streams from the Beta and use this for the same process

Hehe I like this hacking attitude, I know the shogun that i own can record 60fps but untill know this was not so important.

if your recorder can do that, why not

I will try a test next week, reminds me of 422 + 022 down 2 x SDI for a full 444 capture from CCD like F23 and F35 and Vipers, in the day :-)

I guess probably 1.4?

more 1.2

Bertl: ah ok

thanks

(although the 3xHDMI plugin module is not complete yet)

Bertl: might it be possible for a later design of output module to provide either 3x HDMI @ ~v1.2 or if only one socket is in use, switch to an HDMI 1.4 mode?

the current HDMI limit is from the Zynq, i.e. it is the maximum rate per lane which can be achieved

ah ok, fair enough

oh really?

so you can switch between those plugins if needed

Bertl: that sounds great

yup

Bertl: and would the 2.0 plugin be for the Gamma cam or the Beta as well?

nice - thanks for the info :)

off for a nap ... bbl

Hi there ! I hope the 3d printed enclosure is useful for you ! :)

great !

off to bed

nn