I have an img that it is a black line. I try to convert to vector: Inkscape > Path > Trace Bitmap. Even the img is just a fine line, it makes two vector lines: one for the outside border of the original shape and another for the inside border.
If I select the shape with the arrow it seems just one line. But if I select with the Edit path tool seems like two parallel lines.
Do you know how to make the vector conversion with just one line? Or perhaps, is there a way to make the two lines into one, later?
The shape is very complex, but as an example, I show you a simple circle. It has two lines and I need just one:
Set the fill color to transparent and apply a stroke to your shape.
In the menu, go to
Path > Break Apartto separate the shape into multiple individual paths.
Delete the extra paths you don’t need.
This might not preserve the exact shape of the original object but might be good enough depending on what kind of shape you are working with.