Archived posting to the Leica Users Group, 2004/09/30
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Feli di Giorgio <feli@creocollective.com> wrote: > >On Thu, 2004-09-30 at 13:38, animal wrote: >> How to make a coke bottle behave like a summicron >> http://www.dxo.com/en/photo/home/default.php >> best regards >> simon jessurun > > Yes, but again all of these operations involve sub-pixel transformations > to the image. Sub-pixel transformations are operations where a pixel is > moved a fraction of a pixel. You can't really do that, so you have > to interpolate the data and every time you perform one of these operations > you cut the resolution of your image data in half. So yes, the image will > no longer show the effect of the barrel/pincushion distortion, but it will > have taken a hit in the sharpness department. How big that hit is, depends > on how sophisticated the filtering algorithms are in your software. There > is no magic software bullet that will fix these problems. Software fixes > like this aren't a substitute for a good lens. To quote my old boss: > "You can't make chicken salad, out of chicken shit." Software corrections also can't fix coma, spherical aberation, flare or chromatic focus shifts. Doug Herr Birdman of Sacramento http://www.wildlightphoto.com