Thanks I have already try path operations (duplication difference opacity to see by transparency and so on) I was just expecting an more automatic way )

Hello, Starting from one picture (jpg), I have transform it into indexed 5 colour picture within gimp, and register one picture by color. Then I have open the 5 pictures within Inkscape, and trace the 5 bitmap independently. See attached file yarnball.svg The problem is the area superposition : some...