Gear Talk > EOS Bodies - For Video
5D Mark III Magic Lantern wish list poll
peederj:
--- Quote from: HurtinMinorKey on April 28, 2012, 08:14:57 PM ---Is it true that a camera like the 5D3 can't do 4:4:4 color because the Bayer sensor is set-up as 4:2:2?
--- End quote ---
Almost certainly false. The sensor is 22MP and all it needs for video is 2MP...there are plenty of photocells to do whatever one wants with.
People (and I'm citing you as a victim of this, not a culprit) troll around on these boards spewing nonsense about demosaicing and anti-aliasing and OLPF's and the like proving nothing more than "a little knowledge is a dangerous thing." We need an actual authority on camera technology to do a full exposition of what is going on in the camera, but sadly those people rarely post anything like that, because they are usually paid as consultants to the companies making this stuff and don't want to bite the hands that feed them. Canon themselves will just tell you to buy the C300, and if that's not enough for you, the C500.
As for ML, I would just like to see if they can improve the delivered resolution and frame rate control a bit, otherwise the stuff they have already done like peaking and zebras will be a great help thanks.
HurtinMinorKey:
^ just to be clear, i wasn't subverted by someone else's posting, i came up with that lunacy on my own. But I agree with the spirit of your post.
I know that the camera is 22 MP, but the Bayer pattern is set up at a 4:2:2 ratio, which that means that their are effectively 11 M Green photosites, 5.5M red and 5.5 M Blue.
If they are alternating lines still, then there just isn't enough information for them to end up with a full HD picture using equal ratios of color information without interpolation.
WarStreet:
focus peaking
syder:
--- Quote from: HurtinMinorKey on April 29, 2012, 01:47:19 AM ---
I know that the camera is 22 MP, but the Bayer pattern is set up at a 4:2:2 ratio, which that means that their are effectively 11 M Green photosites, 5.5M red and 5.5 M Blue.
If they are alternating lines still, then there just isn't enough information for them to end up with a full HD picture using equal ratios of color information without interpolation.
--- End quote ---
When expressing chroma subsampling ratios the 4:2:2 doesn't refer to primary colours as G:R:B, it's Y:Cb:Cr which refers to Luminance (Y) and two colour difference components Blue Difference (Cb) and Red difference (Cr)
daveswan:
Just set it up so the wretched thing outputs somewhere near true 1080p resolution.
A 150mbps CBR I-Frame codec would be nice.
A full raster de-moseic of the sensor would certainly give 4:4:4 colour sampling (Not colour *space*, that's something different) as there's plenty of pixels for downsampling
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