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Posted by RichA on 08/27/05 09:26
Getting away from high quality CRTs is probably the most
backward step ever completed in computer screen and television screen
"evolution." Essentially, the novelty of flatness size has
replaced top quality.
The colour, contrast, dyanmic range of LCD is rubbish.
But, maybe novelty can replace the second-rate 2d presentation
of LCDs?
From http://www.physorg.com/printnews.php?newsid=6014
Japanese Public Broadcasting Envisions 3D Future
Japans national public broadcasting authority, Nippon Hoso Kyokai
(NHK), is pursuing a Super Hi-Vision 3D television. NHKs research has
centered on the integral imaging (II) technique for creating 3D
television. This avenue of research was chosen because the 3D image
can be viewed without the use of special glasses. In addition, because
an actual three-dimensional image is replicated, eyestrain caused by
viewing ghost images is avoided.
NHK researchers have refined their model heavily over the last 15
years. Currently, the key component is a lens array composed of tens
of thousands of tiny lenses, or lenslets arranged in a regular
pattern. Each lenslets angle reveals a slightly different perspective
on the scene to be recorded. An incredibly sensitive CMOS image
sensorover 16 times the sensitivity required for HDTV
recordingrecords the reflected light rays. Then, the captured images
are analyzed to create the original 3D image. To create live 3D HDTV
feeds, NHKs HDTV version of a 3-D camera records and analyzes data
composed of over 410,000 pixels at a frame rate of 59.94Hz.
To display the image, the recording process is reversed. An incredibly
sharp LCD screen projects through a lenslet array to create a
holographic image. Of course, using a lens reverses the image (much
like looking through the bottom of a glass), so during the display
process, a concave-convex converter is used. In order to convey
scenery depth, NHK researchers devised an algorithm calculating the
parallax of each lenslets reflected light, creating a hologram that
is different in both size and position from the original object.
Because current technology cannot create small enough pixels, much
like older television sets, the display choices are either a big,
fuzzy hologram, or a small, sharp hologram. Since the size and pixel
pitch of the HD LCD restrict the viewing zone, current technology
limits the size of the viewing zone to about 2.5 at 35 away. In
addition, the coarseness of current LCD screens generates a ghost
reverse image, which NHK is eliminating through computer processing of
the recorded data. To increase holograph size, NHK is working with
extra LCD light bent around the lenslets to fill in the gaps left
between pixels.
by Courtney Ostaff and Jason D'Aprile , Copyright 2005 PhysOrg.com
"Bittorrents are REFUNDS for all the BAD movie products Hollywood
never gave us refunds for in the past"
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