Bayer with NO anti-aliasing (Kodak Pro 14n)

Discussion in 'Digital Photography' started by K2, Nov 28, 2003.

  1. K2

    JB Guest

    That was exactly my point!

    JB, Dec 17, 2003
    1. Advertisements

  2. (pehache) wrote in

    Maybe I was unclear.

    It is of course high frequencies that are aliased.

    But, if you have a sharp lens and take a picture of
    a sharp edge, then this edge contains high frequencies.
    If this edge then is slightly slanted, then you will get
    a very strong staircase lookalike effect. This is aliasing
    and the staircase effect is low frequency, i.e. it is larger
    than one pixel. Looks bad - really bad.

    If you add an anti alias filter (or the lens simply is not
    sharp enough), then you will not get any aliasing. You can
    still get a staircase effect on upscaling. But the "stairs"
    are one pixel large only.

    Roland Karlsson, Dec 17, 2003
    1. Advertisements

  3. K2

    Mike Engles Guest


    That was the problem. I was looking at A300 images.

    Mike Engles
    Mike Engles, Dec 17, 2003
  4. K2

    Mike Engles Guest


    The Canons have no texture. Not much of a choice.

    Mike Engles
    Mike Engles, Dec 18, 2003
  5. K2

    JPS Guest

    In message <>,
    The Canon SLRs have about as much texture as can be properly sampled in
    a CFA. If they had three concentric RGB sensors for each pixel, then
    they would require a little less AA filtering, but would still look
    softer than SD9 images at a 1:1 viewing. The SD9 pulls out all the
    stops, and cheats the laws of sampling to give images that are sharp due
    to artifact, on a pixel-by-pixel basis rather than truly sharp
    continuous *images*. Anyone who thinks the SD9 gives sharp, realistic
    images needs to have their heads examined. It is quite obvious that the
    SD9 images look sharp because they only sample a fraction of the area of
    the focal plane that they pretend to be sampling, so there's lots of
    contrast from pixel to pixel.

    JPS, Dec 18, 2003
  6. I was wondering why all the bricks in my pics show in straw weaving, thanks!
    George Preddy, Dec 18, 2003
    1. Advertisements

Ask a Question

Want to reply to this thread or ask your own question?

You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.