thanks for this! it works fine on my machine. the conversion is done in lcms2, right? they do support unbounded transforms now. if we're not clipping to [0,1] the colour space should not matter at all. i'm not sure i understand the difference between icclab and cielab. but if we could just keep it in lab (cie, d50), we would need to select lab as input colour profile, too. this will result in disabling the colorin module and thus faster processing by handing down the buffer that is already lab.
cheers, jo On Sun, Jan 13, 2019 at 4:38 AM Ulrich Pegelow <[email protected]> wrote: > > There is now a PR in github that makes darktable read LAB Tiff files > (PR1996). Please give it a try. > > FYI, the Tiff file gets internally converted to sRGB when opened. sRGB > represents a much smaller gamut than Lab. Please check if this gives > problems like much too low color dynamics. A larger gamut like AdobeRGB > could be an option in this case but would require a bit more work. > > Ulrich > > Am 09.01.19 um 15:22 schrieb Christian Stromberg: > > With the latest update that includes the new spot healing tool, > > darktable is now a serious choice for scanner operators as well. > > However, it still fails to correctly interpret 16bit TIFF files in LAB > > color space that are output by Heidelberg's scanner software Newcolor. > > This software supports Heidelberg's high-end flatbed and drum scanners > > that are still in use worldwide in considerable numbers and its output > > in LAB color space allows for the most flexible editing of the scans. > > Photoshop and Lightroom do read it correctly while darktable screws up > > the colors, making everything look neon colored, which btw. is also the > > case for many other tools. I still haven't found out what the cause is. > > > > What would be needed to get that fixed? Does it make sense to upload > > such a TIFF file to rawpixls? > > > > Best wishes, > > > > Christian > > > ____________________________________________________________________________ > darktable user mailing list > to unsubscribe send a mail to [email protected] > ____________________________________________________________________________ darktable user mailing list to unsubscribe send a mail to [email protected]
