2009/8/16 John <jrschwal...@gmail.com>: > > > > On Aug 15, 8:33 am, Bruno Postle <br...@postle.net> wrote: >> In reality the CCD resolution is effectively lower than the pixel >> resolution, so you can always stitch digital camera photos at 60% or >> so without losing much. It will vary depending on camera, but I >> would expect to start seeing aliasing artefacts if you stitch a >> panorama below around 40% of full size. >> >> -- >> Bruno > > Hi, Bruno.. > > Can you explain what you mean by the above? > > For example, I always thought that if one had a 6 megapixel camera > (CCD or CMOS) of 3000 by 2000 pixels, that would be the "resolution" > of the image. > > Thanks....JOHN > > >
It's caused by the way how sensors are made. Most of manufacturers (in fact all except Sigma with it's Foveon) currently uses so called Bayer filter [1]. If look at the images in the Wikipedia article [1] you'll see that every pixel is able to detect only one color and thus the color in resulting image is created by interpolating color from it's neighbour sensors (it's called demosaicing). Nice proof of that are images taken with Foveon based cameras (eg. Sigma SD 14) which measured by resolution has only about 4.5Mpix but in real it's has quality as 14MPix camera. [1] http://en.wikipedia.org/wiki/Bayer_filter --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "hugin and other free panoramic software" group. A list of frequently asked questions is available at: http://wiki.panotools.org/Hugin_FAQ To post to this group, send email to hugin-ptx@googlegroups.com To unsubscribe from this group, send email to hugin-ptx-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/hugin-ptx -~----------~----~----~----~------~----~------~--~---
