Dear Colleagues, I refer to the discussion on the above topic on this digest, Issues 26 to 29, the discussion driven by Jeremy Rosen, Thouks, Pascal and a number of others. As requested by some partners in the discussion, I have (at last) posted some images at the following site:
https://www.dropbox.com/sh/3n1gmle42s6p5cd/vV967SzKGO?lst I uploaded a few of the original raw images, as well as the accompanying dt XMP files and one or two JPG exports for these images. What they have in common is not that the images are good, but that they were taken in various degrees of challenging situations, most of them with little light and at moderate to high ISO settings. Images 8282 and 7882 are silhouette-like, taken against a cloudy sky in the rain and with a moving subject and no opportunity to adapt before taking the shots, any photographic parameters according to these conditions. I normally set the camera to the general light conditions of the general environment, but often the encounters with subjects are so brief that any other settings are impossible. So they really qualify as "snapshots". Most of these types of photographs need post processing to turn them into something that is interpretable. Grain is often a serious problem with these types of photographs. I have a thing about sharpness, but with these types of shots increasing the sharpness normally brings about unacceptable levels of grain. Most types of increase in exposure, e.g. exposure tool or base curve also brings about much more grain. Photograph 8282 is possibly one of the most difficult types of shots I am sometimes forced to take. [This is one of the world's rarest monkeys, photographed high up in a forest canopy in Cameroon]. The photo "31_Preuss's red colobus.jpg" has some bright-red pixels that appear when exporting the JPG. I am convinced this is a software artifact, and nothing to do with the CCD of the Canon 7D camera. Does anyone have any comments on which type of post-processing will reveal sufficient detail in theses difficult shots but which avoids high grain levels or other pixilated artifacts? Fundamentally one cannot create an picture with information that is not already contained in the source image. Sometimes I thin I am trying to extract more than which really is available. Thank you for your time. Kind regards, Willem ------------------------------------------------------------------------------ Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_feb _______________________________________________ Darktable-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/darktable-users
