2009 is when he did the article; 2005 is when he did the presenjtation at the HPA Tech Retreat.
TTFN, Mark On 2/8/2014 3:40 PM, Bob England wrote:
Going back to the linked article, we note that John Galt was with Panavision at the time (not Panasonic; gotta watch those Panas) and the article is described as a "wide-ranging, no-holds barred conversation" from 2009 (not 2005).Bob EnglandOn Sat, Feb 8, 2014 at 9:11 AM, Alan Roberts <roberts.mugswell@xxxxxxxxxxxxxx <mailto:roberts.mugswell@xxxxxxxxxxxxxx>> wrote:Terribly ancient news, I'm afraid. It's been one of the subjects I lecture on for at least 20 years. A On 08/02/2014 16:16, Mark Schubin wrote: 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 <mailto:opendtv-request@xxxxxxxxxxxxx> with the word unsubscribe in the subject line. ---------------------------------------------------------------------- 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 <mailto:opendtv-request@xxxxxxxxxxxxx> with the word unsubscribe in the subject line. ---------------------------------------------------------------------- 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 <mailto:opendtv-request@xxxxxxxxxxxxx> with the word unsubscribe in the subject line.