Hi Mark and Jeremy, Could that be a feasible solution? 1) Creating a hue-sequence custom colormap 2) Calculate hue and saturation values based on R,G,B fields (you can use a custom function for 2D datasets) 3) Show the hue field in image widget with hue colormap, and set transparency following saturation field.
May I be wrong here? What colour should be graph background for proper saturation? Sergey > -----Original Message----- > From: Veusz-discuss [mailto:[email protected]] On Behalf Of > Jeremy Sanders > Sent: 06 February 2016 15:28 > To: Mark Durre <[email protected]>; [email protected] > Subject: Re: [Veusz-discuss] Layering of images > > Hi Mark > > On 02/01/2016 04:30 AM, Mark Durre wrote: > > > Perhaps what is needed is to just numerically add the RGB colors from > > each layer (obviously clipping at 255), with the user adjusting the > > colors by choice of colormap (e.g. blue, green and red, but could be > > others) and the Min/Max values and scaling mode. > > The layering is currently just what you get with Qt if you use different > opacity > for the filled regions. It's what you get if you just hold materials with > different opacities in front of each other. > > A more sophisticated image widget with layers could add the layers in > different ways (e.g. as RGB components), but this would have to be done > within the widget. > > Cheers > > Jeremy > > _______________________________________________ > Veusz-discuss mailing list > [email protected] > https://mail.gna.org/listinfo/veusz-discuss _______________________________________________ Veusz-discuss mailing list [email protected] https://mail.gna.org/listinfo/veusz-discuss
