Sorry, I dropped into jargon ... ;-) Generally, highly detailed scenes with lots of interacting edges are considered high frequency. Scenes with few hard edges and crossing interactions are considered low frequency. Digital "sharpening" techniques use to enhance the perception of sharpness ideally take these differences into account: a low frequency scene generally takes a lot more edge enhancement before looking over-done, where a high frequency scene becomes a jangly mess pretty fast.
Said as corollary, it is generally a lot easier to sharpen a low frequency scene and make a pleasing print than a high frequency scene. Examples of high frequency scenes: texture shots of bark, grasses, trees, waves, concrete surfaces ... Examples of low frequency scenes: portraits ... Godfrey On Jul 24, 2007, at 1:00 PM, Kenneth Waller wrote: > Godfrey, I'm unfamiliar with the term "low frequency" as it relates > to this > discussion. > Please elaborate. > > Kenneth Waller > > ----- Original Message ----- > From: "Godfrey DiGiorgi" <[EMAIL PROTECTED]> > > Subject: Re: Print sizing question > > >> Native resolution would have it print at about 80 ppi, which is a bit >> too low. I'd uprez it to about 2.7x that resolution, making a >> 4160x5200 pixel file, and then do some careful resharpening for the >> 16x20 inch print @ 260 ppi. It will not be great for ultimate >> resolution, but if the subject matter is moderately low frequency you >> should get a nice print out of it. >> >> Or just print it from Lightroom and let Lightroom do the resampling >> for you. I've found it does a pretty darn good job. -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
