|NOTE: |This may be the second time this message appears, but I think I've been |using an old address of this list? |-------- Original Message -------- |Subject: postprocessing filmscan with heavy grain |Date: Sun, 09 Jul 2006 21:07:16 +0200 |From: Vic Mortelmans <[EMAIL PROTECTED]> |To: pentax epostlijst <[email protected]>
Hi, I'm looking into low-level postprocessing techniques and I'm a bit puzzled how film grain influences postprocessing. More precise: will a film scan that has no grain (e.g. scanned at low resolution) look the same as a film scan that has visible grain (e.g. high-resolution scan), when you apply exactly the same postprocessing? Because postprocessing is typically non-linear, the change applied to dark pixels may be totally unrelated to the change applied to bright pixels. But what happens to an image area that---to the eye---has a medium-gray brightness, but---at the pixel level---is a mixture of bright and dark pixels due to grain. I doubt that the effect is as desired, i.e. as you would expect on a smooth image that has no grain, even if the processing is as simple as a gamma-correction. Any experience with this? Groeten, Vic -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
