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FORUMS Canon Cameras, Lenses & Accessories Canon EOS Digital Cameras 
Thread started 30 Oct 2009 (Friday) 18:17
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Video on DSLRS - down-sampling or pixel-dumping?

 
mrkgoo
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Oct 30, 2009 18:17 |  #1

I'm not sure what the terms are, but are the HD videos recorded from the Canon cameras capable of HD video (ie 720p or 1080p for 5DmkII, 7D, 1DmkIV, T1i):

* down-sampled from a high res frame (ie uses all the pixels and 'resizes' each frame) - kinf average a block of pixels.

or

* pixel dumping, and just taking the reading from a single pixel at the appropriate location on the sensor.

Do we know this information? Is it the same for all EOS HD, or are each camera different?




  
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Daniel ­ Browning
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Oct 30, 2009 18:45 |  #2

They use a combination of both row skipping (pixel dumping), perhaps some analog binning (horizontal only), and certainly at least some digital resampling.

mrkgoo wrote in post #8926680 (external link)
Do we know this information?

Analysis of the aliasing patterns of a zone plane and the noise levels of image tones dominated by photon shot noise.

See this thread for more information:

http://luminous-landscape.com …x.php?showtopic​=38713&hl= (external link)

mrkgoo wrote in post #8926680 (external link)
Is it the same for all EOS HD, or are each camera different?

I think they are each different, at least by a small amount. However, they all have astronomically terrible levels of aliasing (so far).


Daniel

  
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mrkgoo
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Oct 30, 2009 19:32 |  #3

Thanks for the info. :)




  
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Video on DSLRS - down-sampling or pixel-dumping?
FORUMS Canon Cameras, Lenses & Accessories Canon EOS Digital Cameras 
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