Since these go from 0-255, It might be possible to convert that range into an opacity value. So equal values to r, g, b for each level of grey it produces. However, the trace bitmap with greyscale option selected, does trace to traditional grey values as far as I can tell. Selecting all in layer or clicking the group in that layer should allow for selection.īlluis - I know nothing about the filter editor - I think it's possible to do almost anything using its advance features - someone else on here may be better placed to comment. The original registration extension I made, puts all scans into their own layer the order, of which corresponds with the original z-order of the scans.Īs long as you don't drag or move things out of the layers that should remain forever. Nelchai - it depends what you mean by z-order. I know that after export the image I can use Gimp to move grays to transparent, but I prefer to do all the things inside Inkscape because from time to time I need to retouch some vector and make the procedure again and I can forget the external step on Gimp (Still a little older and forgot too many things). I've tried with Filter editor, Color Matrix, Luminance to Alpha but I'm a little older to understand the complexity of the filter editor, also I try almost all the filters and extensions and found nothing that made what I need. Is there any filter that I can apply to the vector image to convert all the gray colors to black with transparency? Is there any way to make the Trace bitmap tool to generate a black color with a transparency for each of the gray level?

Now I need to work with a very complex image with many gray levels, so I need to make a 127 or more scans until I have a decent image based on vectors but I don't want to change manually every one of the 127 gray levels to a transparent color. I've been using Inkscape from many years converting pixel images to vectors using the Trace Bitmap tool, then edit and work on vectors to finally generate a png output, most of the times I use monochrome images and I convert using 8 or 16 scans.īecause Trace bitmap tool generate grayscale image with solid gray colors I use to select each one of the colors and manually convert to black and set the transparency according a scale implemented in the moment, so, the pure black stay on black with 0 transparency, then some #101010 gray go to black with #10 of transparency, some #202020 go to black with #20 of transparency and so on.

Inkscape trace bitmap transparency