Am 31.10.2012 21:09, schrieb Juan Luis Fernández Gallo: > Hi, > > I've found that difference blend module would be useful to get something > like a "visible mask" when using the sharpen plugin. This blend mode > gives information about the impact of the sharpening in the image, with > white lines that get lighter when you give more force to the sharpening. > However, the difference mode gives a strong blue screen, so that white > lines are difficult to see. Is there a way to change that blue color? It > would be nice to have a neutral grey instead, IMHO. > Hi,
this is a known issue. Blend mode "difference" works well for modules in RGB color space but gives a blue tint in Lab (that's the color space where sharpen operates in). I have not found a good way to handle with this issue yet. Software like Photoshop solve this problem by not offering this blend mode for images in Lab. If someone has a good idea, I am fine to implement it. Probably we would need to limit ourselves to the L channel and sacrifice a and b. Ulrich ------------------------------------------------------------------------------ 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_sfd2d_oct _______________________________________________ Darktable-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/darktable-users
