Today I started to vectorize some old black and white handdrawn designs I created a long time ago. And I ended up with the problem, that some of the scans had a lot of speckles. One of this drawings was the following “skeleton sperm” or whatever you wanna call it:
Doesn’t look that bad, but when you some in you can see a lot of annoying pixels around the lines:
When using Inkscapes “Path >> Trace Bitmap …” feature to vectorize the above image, I ended up with yome really ugly paths:
Years ago I used to remove this either in the bitmap or the path with a lot of effort by hand. Today I found a really nice technique to avoid all that tiresome work.
Now you can use the “Select >> Refine Mask Feature to refine the Selction and get a smoother look. For me the following settings have worked well. This depends on the size of your image and other factor, have fun playing around with these sliders.
Save the image and open it in Inkscape. When you now trace the bitmap image using “Path >> Trace Bitmap …” the result will get much smoother without all the speckles.