Canon 5D Mark II

[Terka]

please see
http://en.wikipedia.org/wiki/Canon_EOS_5D_Mark_II :
"bitrate is approximately 38 Megabits per second"
"The 21 megapixel sensor is downsampled to HD resolution by only using every third line and 4:2:0 chroma subsampling, leading to concern about Moiré patterns in recorded video."
because its similar task as deinterlace, want to ask:
is it possible to use upscale (Tritical`s nnedi3) and some 4:2:0 correction to improve the resolution?
My goal is to get single pictures from the video as good as possible.
Which resolution could i expect when such task will be finished?
hd has 2mpix, some h264 compression lowers the resolution, but the upscale could improve it. do you think i can reach ~4mpix
:thanks:

[poisondeathray]

nope , it produces very soft image. It's not known for it's resolution, it only resolves about 600 lines

after you apply anti-aliasing and various filters (very bad aliasing & moire), actual resolution is even lower

the strengths are shallow depth of field at a (relatively) low price

[Yellow_]

Spent no time on this, here's a 4k image from a random h264 source file off a Canon 550D, not full frame sensor. No sharpening. Just minor sharpening in camera before compression. (RMB Save Link As)

http://www.yellowspace.webspace.virginmedia.com/4k_0000.png

One more.

http://www.yellowspace.webspace.virginmedia.com/4k-2_0000.png

1960's glass. No L Series or anything. :-) Guess it shows. :-) Banding clearly visible.

[Terka]

Thank you both for reply,
the softness is probably due the downscale process.
i want to use the deinterlace techique to upscale.
dont know if 550d uses same "discard 1st & 2nd, keep 3rd line"
2 Yellow_> how you did your 4k picture?

[Ghitulescu]

please see
http://en.wikipedia.org/wiki/Canon_EOS_5D_Mark_II :
"bitrate is approximately 38 Megabits per second"
"The 21 megapixel sensor is downsampled to HD resolution by only using every third line and 4:2:0 chroma subsampling, leading to concern about Moiré patterns in recorded video."
because its similar task as deinterlace, want to ask:
is it possible to use upscale (Tritical`s nnedi3) and some 4:2:0 correction to improve the resolution?
My goal is to get single pictures from the video as good as possible.
Which resolution could i expect when such task will be finished?
hd has 2mpix, some h264 compression lowers the resolution, but the upscale could improve it. do you think i can reach ~4mpix
:thanks:

IIRC this model is a FullHD one, so that means you can only get 1920x1080 (if progressively shot). Use it as a photocamera (its originally intended use) to get better photos.
Everything else means interpolation/extrapolation.

[Yellow_]

Thank you both for reply,
the softness is probably due the downscale process.
i want to use the deinterlace techique to upscale.
dont know if 550d uses same "discard 1st & 2nd, keep 3rd line"
2 Yellow_> how you did your 4k picture?

I don't know what the 'deinterlace' technique is that you mean, but I'd keep your options open. :-)

The images above were just using ResampleHQ, with SplineResize (default) for upscale and 'bilinear' (default) for chroma, I've probably used the wrong kernels for upscaling. :-)

There's also Dither 1.9 which includes 8 to 16bit processing, debanding, resizing, dithering back to 8 or piping 16bit to Imagemagick. That may be an avenue too.

Also possibility of t3dlut with ycms for the conversion to RGB although both the above do RGB conversions with more choice than a typical ConvertToRGB().

[Terka]

DV (interlaced) is only 720/2=360 lines. but using TGMC you can increase the resolution.
im speaking about interpolation. i know it has 20mpix @ 3fps. 3-4mpix @ 25fps is what i need.