It is often misunderstood that embroidery digitizing is graphics designing. It is completely a different process. Special softwares are used to generate codes for the design to be turned into stitches that can be read by embroidery machines. Everything from needle up n down to sew, embroidery machine do is programmed with in the design of your artwork. Even the thickness, spacing all are done through computer programing. Digitizing is also mistaken as a scanned process like screen printing, but it is far more complicated process for which you need years and years of experience to have good command on your work.
Clean and high resolution images are needed for the best results.