Homebrew PCBs

and then Raster should to some automatic magic to make the lines 
straight and beautiful. 

Anyone knows how to train a hamster in using a Photoshop?  

I'll give a good analogy to OCR and scan. If you scan a page it will 
scan not only text but many other dots and specs present on that page. 
OCR will take that page with many imperfections on it and output a 
text file as clean as the blank page in your printer

Mike