Inkscape allows for automatic drawing of the path of an image. But it always uses a very thin line, and just about draws and outline. Do you know if there is a way to set the automatic tracing process to use a thicker line, so at least black and white images without fills can have a line that is traced that is thick enough? Otherwise I have to break apart every black and white image and do the tracing myself.
I'm not aware of any such setting when using the automatic trace feature in Inkscape (If any does know of one please correct me!). You will tend to get the best results when tracing manually, even though it can take more time and work.