Truman Prevatt

Truman Prevatt

Lives in United States Brooksville USA, United States
Works as a Mathematical Physicist
Joined on Dec 24, 2001

Truman Prevatt's recent activity

  • I historical terms, the camera market is over inflated.  It's really a bubble caused by the advent of digital imaging which made it much easier to take and share images.  The SLR has always had a ...
  • Replied in The End Times
    The one thing the cell phones will be able to compete with - sensor size.  Sensor size does matter in over all image quality.  It also matters in lenses - particularly wide angel lens.  It is ...
  • The thing people overlook is market for DSLR's today is the anomaly - it is not the historical norm.  In the 60's, 70's, 80's before the days of digital SLR accounted for a small proportion of the ...
  • Replied in The Top Layer
    Thanks Ted, Not my first fractured ribs - your ride horses you get busted up from time to time ;-) - and thankfully not my worse case.  Since it is the bottom of the rib cage on the right - the ...
  • The eternal argument on the Nikon forum is about DSLR sales going down the toilet and how Nikon (and Canon also) will go broke unless they go to mirror-less.  The problem the Sony AR's are not ...
  • Replied in The Top Layer
    One of the bigger issues in criminal justice is the unreliability of "eye witnesses." Over and over they swear to and honestly believe their accounts but their accounts are wrong. In science there ...
  • Replied in The Top Layer
    Sorry folks - James Clerk Maxwell didn't lie. Neither did the early pioneers of the properties of semiconductor materials from Hall to Schotky and Mott. How the Foveon works is pretty simple mid ...
  • Replied in The Top Layer
    Ted, The physics of transmission of radiation (including light) in semi-conductors is well understood.  Shorter wavelengths (toward the blue) are propagated a short distance while longer ...
  • Bokeh is a fuzzy concept.  Bokeh is also a concept that only matters if the lens is shot wide open and the faster the lens the better the Bokeh.  When I was taking courses at MD Institute of Art ...
  • Replied in Sigh
    The term rate was probably a bit sloppy for multidimensional digital sampling systems. In reality you can only have a constant sampling interval for one dimensional sampling. That is the ...
  • Replied in Sigh
    When the multiple layers are process to produce a 20 MP color image, the lower two images are only 5 MP - read the specs my man.  Those data can contain only spatial frequencies that can be ...
  • That it is or is not a "Foveon" is pretty much an exercise in wordsmithing.  However, it is not a true color sensor which get three different color pixels at the same location and does not require ...
  • Yep, I just check - the spell checker doesn't like tripack. We are getting close to that.  And you are right after a certain point - true color will not offer anything over Bayer.
  • Since there is no AA filter in the Q, it is not so much that the high spatial frequency color variations will not be detected, they will be aliased into lower frequency artifacts.  So there are is ...
  • Yep, my mistake.  We just bought a Pro for a project I am working on and it only comes with a solid state disk.  In reality computer architectures have always been based on "fast random assess ...
  • Replied in Give it a rest
    The science is pretty solid - the mathematics is very solid. The sampling theorem is real. Trust me it works - even if you don't seem to want to believe it. The Petersen–Middleton theorem ...
  • Spinning disk will disappear from laptops, PCs and workstations soon being relegated to large server farms that depend on raid architectures  because of cost. In a large server farm, e.g. iCloud, ...
  • I find it interesting that now as the "false colors," a.k.a. color aliasing from lower layer subsampling has become obvious that people are finally returning to the M sensor.  The fact of ...
  • Nikon often designs it's own sensors and farms out the production.  Nikon will also design mods to Sony sensors and contract to Sony to build them.  They use Sony along with other foundries to ...
  • Hit the button to quick - here is the link. http://www.roadrunnersinternationale.com/transporting_the_a-12.html
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