On Thu, Nov 30, 2017 at 2:44 PM Elle Stone wrote: > > It seems to me that full LAB support would require: > > * The option to open images that are in the LAB color space, keeping in > mind that there are various LAB color space ICC profiles floating > around, and some LAB images don't have any embedded ICC profile, but > instead just have metadata that indicates the color space. > Upon opening a LAB image, it could be immediately converted to RGB > for processing, as the conversions from RGB to LAB or LCH for further > processing in these color spaces are already handled by babl. > So you are not in the scene referred / display referred camp now? :) > * The ability to do Curves and Levels operations on the LAB channels and > perhaps on the CH channels. We briefly discussed this on #gimp a while ago, it's seems to be doable presently already (but is likely to be somewhat slow). * Adding L/A/B/C/H histograms to the Histograms dialog: We already have > Luminance in the histograms dialog. Lightness is just the perceptually > uniform transform of Luminance. > https://gui.gimp.org/index.php?title=Work_in_progress_on_histogram_redesign Admittedly, I got sidetracked from this. > What else might be required to add full support for the LAB space to GIMP? > There's probably a place for LAB/LCH-specific tools, like some iops in darktable (e.g. color contrast, CLUT, and especially color zones). Personally, I'm also a big fan of conditional blending (as available in both darktable and e.g. Photoshop). In darktable, it operates on LAB channels: http://www.darktable.org/2012/03/upcoming-features-conditional-blending/ http://www.darktable.org/2012/07/some-enhancements-to-conditional-blending/ In Photoshop, it appears to work on whatever channels as per current color mode: https://digital-photography-school.com/photoshop-tips-blend-if-feature/ Alex _______________________________________________ gimp-developer-list mailing list List address: gimp-developer-list@xxxxxxxxx List membership: https://mail.gnome.org/mailman/listinfo/gimp-developer-list List archives: https://mail.gnome.org/archives/gimp-developer-list
