Re: [CinePaint] masks; detail 8 vs. 16+ bits...RAW
Robin Rowe <[email protected]>
| Newsgroups | gmane.comp.video.cinepaint.user |
|---|---|
| Message-ID | <[email protected]> |
Also the RAW file, please. Rob Lingelbach wrote: > I've posted three images to these locations: > > http://www.colorist.org/images/DSC_1180.tiff > 16-bit TIFF OpenEXR Half Float - Rgb - Wide Gamut D65 > (saved from Cinepaint, no adjustments) > > http://www.colorist.org/images/DSC_1180_gimp.jpg > 8-bit jpg saved from The Gimp, nothing adjusted. > > http://www.colorist.org/images/DSC_1180_lightroom.tiff > 16 bit (?) file saved from Adobe Lightroom, imported from Nikon > camera same as above files. > > I'm uploading them now, should be about 20 minutes from now they'll be > available. > > Acutance; we have had quite a few discussions about this on the TIG, > as well as stochastic resonance, and these are fascinating subjects. > Any feedback about what is happening in these images presented is very > welcome. > > Rob > > > On Mar 12, 2008, at 10:13 PM, Frank Peters wrote: > >>> Incidentally, yesterday I shot a still in Nikon's NEF (RAW) mode and >>> opened it in Cinepaint and in The Gimp. The difference in fine >>> detail between The Gimp and Cinepaint was not small. Since >>> luminance >>> is the greatest contributor to fine detail, I was at first skeptical >>> that the improved detail in Cinepaint was due to bit depth, but then >>> upon further thinking I believe the luminance is derived from RGB, so >>> bit depth is just as important for luminance. Am I right in this >>> assumption? >>> >> Fine detail depends on acutance, or the difference in contrast >> between closely spaced points. Only the relative and not absolute >> luminosity would play a role here. Post-processing can have an >> effect on acutance but it usually does not, so I would doubt >> that the difference in fine detail that you observe is due to >> a greater bit depth. Also keep in mind that both 8-bit and 16-bit >> images are being viewed through an 8-bit monitor. >> >> Try this: Open the RAW file in Cinepaint and then reduce the bit >> depth to 8 bits with the Image Menu. Does the fine detail >> suddenly degrade or disappear? >> >> It would be useful to post the actual RAW file somewhere file so >> that other list members could experiment. I could be all wrong, but >> without the actual RAW file only the most general of assumptions >> can be made. > > > -- > Rob Lingelbach > [email protected] http://www.colorist.org/robhome.html > > > > > ------------------------------------------------------------------------- > This SF.net email is sponsored by: Microsoft > Defy all challenges. Microsoft(R) Visual Studio 2008. > http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ > _______________________________________________ > Cinepaint-users mailing list > Cinepaint-users-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org > https://lists.sourceforge.net/lists/listinfo/cinepaint-users > -- Robin Rowe CinePaint Project Leader Beverly Hills, California www.CinePaint.org ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/