A real issue, to be sure, but old news. John presented it at the HPA Tech Retreat in 2005.
For tomorrow's news, come to this year's Tech Retreat, February 17-21: http://hollywoodpostalliance.org/?page_id=5978 TTFN, Mark On 2/8/2014 10:08 AM, Olivier Houot wrote:
This interesting discussion by John Galt of Panasonic exposes a logical flaw of the design i was not aware of : http://library.creativecow.net/galt_john/John_Galt_2K_4K_Truth_About_Pixels/1 In short red and blue pixels have half the density of green ones. Hence they provide half the sampling frequency of green ones. You are supposed to have a low pass optical filter in front of your sensor at half the sampling frequency. If you optimize it for green, you let aliasing frequencies for red and blue in. If you optimize for red/blue, you throw away half the green bandwidth (essentially luminance). To me, it means a properly filtered 4K sensor would have a practical 2K resolution. Also inside the discussion, the story of how Imax engineers measured the resolution of their system to be less than 4K, and other interesting bits.----------------------------------------------------------------------You can UNSUBSCRIBE from the OpenDTV list in two ways: - Using the UNSUBSCRIBE command in your user configuration settings at FreeLists.org - By sending a message to: opendtv-request@xxxxxxxxxxxxx with the word unsubscribe in the subject line.
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