From: Mark Roberts
[Default] On Wed, 22 Jun 2011 22:58:30 +0300, Bulent Celasun
<bulent.cela...@gmail.com> wrote:
It seems to be capable of altering some phototographic approaches
radically. I expect dramatic contributions to macrophotography of
static objects, for example. Sports photography may need some
more time, though...
Yep. Apparently you get a ~12:1 reduction in resolution in return
for this post-shot focus capability: Your 24-megapixel sensor becomes
a 2 -megapixel sensor. It'll be interesting to see where this goes.
I didn't know what "plenoptic" means, so I looked it up.
I eventually ended up at a Wikipedia page about the "4D light field" ...
I didn't understand all of it. Describing math that's beyond my grasp
using words ain't my best subject.
But this part seems fairly simple:
In a plenoptic function, if the region of interest contains a concave
object (think of a cupped hand), then light leaving one point on the
object may travel only a short distance before being blocked by
another point on the object. No practical device could measure the
function in such a region.
It goes on to say if the locations are "restricted to outside the convex
hull ... of an object", the plenoptic function can be measured by a
digital camera.
Most everything I photograph is made up of both concave & convex surfaces.
How do they overcome the problem with the concave ones? If they can't
then only part of the photo works.
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