Pavel Machek
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Pavel Machek
pavel
@dos @martijnbraam @linmob Martijn, if you agree with the analysis, would it be worth it to somehow "retract" that blog post / publish updated one?
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Pavel Machek
pavel
@dos @martijnbraam @linmob Yes, agreed, effect may be from differences between the pixels. If it was bigger, it may be worth it to try to work with it, but it is likely too small to exploit.
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Pavel Machek
pavel
@dos @martijnbraam @linmob Aha, thanks for this. Agreed, there's nonlinearity at the top, but we should not need to correct for it as it is really small.
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Pavel Machek
pavel
@dos @martijnbraam @linmob Can you get, dunno, 20% too bright source in R, G and B? I believe you'll be able to distinguish between 100% and 120% in the averages. And that's the nonlinearity... Aha, I see the new post :-).
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Pavel Machek
pavel
@dos @martijnbraam @linmob So... you are right only center pixels should be considered. And it surely looks like it is linear from 0 to 95% or so. I assume there would be similar effect at the 5% near saturation on red and blue ... and that surely is non-linearity, but may not be important enough to be worth correcting.
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Pavel Machek
pavel
@dos @martijnbraam @linmob Do you have some data to back up that linearity claim? I believe there's consensus that it will not be linear near saturation. OTOH I don't believe there's consensus of how important that effect is :-(. https://www.mdpi.com/1424-8220/24/6/1841
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Pavel Machek
pavel
@linmob @martijnbraam Yep, sensor calibration can be a lot of fun, too. There's enough work to be done all over the place. (And first step -- linearize data from sensor -- is something I'll need to investigate for Clicks Machine).
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@linmob @martijnbraam (And yes, you could / should modify Clicks Machine so that it can do debayer + ISP on files on demand.) (And yes, eventually this should be all integrated into libcamera).
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Pavel Machek
pavel
@linmob
@martijnbraam Megapixels video support is newer version of Millipixels video support. Same limits there. Once 2.0 is released, I may want to update to recent scripts versions, but don't expect miracles there. It would be hard to integrate debayer + ISP onto GPU with Megapixels. You could put GPU ISP into separate process; that's bwtest in debayer-gpu repository. That should be workable, but... Clicks Machine should be superior solution.
@martijnbraam Megapixels video support is newer version of Millipixels video support. Same limits there. Once 2.0 is released, I may want to update to recent scripts versions, but don't expect miracles there. It would be hard to integrate debayer + ISP onto GPU with Megapixels. You could put GPU ISP into separate process; that's bwtest in debayer-gpu repository. That should be workable, but... Clicks Machine should be superior solution.
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Pavel Machek
pavel
Tak facebook se vam pokusi vnutit "professional mode". S nim souhlasite, ze fb odskodnite, kdyz neco, ziskate mensi dosah, a souhlasite s tim, ze spory bude resit zarucene ferova arbitraz nekde v tramtarii. Fakt je to legalni? Nemelo by byt.
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Pavel Machek
pavel
Facebook se mi snazi vnutit "profesionalni rezim". Hadam, ze je to dalsi svinarna z jejich strany. Napoveda je psana tak, aby spis nenapovedela. Napovi nekdo?
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Pavel Machek
pavel
@martijnbraam If you are sure you got threading right, you might want to fix or report it.
But to be clear, this is _not_ gtk problem. It is hardware problem that kernel does not work around.
But to be clear, this is _not_ gtk problem. It is hardware problem that kernel does not work around.
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