There are a bunch of commercial programs that you can put your charts in (manual process, I don't know of anything that would quickly read your graph). Two are PC Stitch and Pattern Maker. I'm pretty sure you can check out a demo version of Pattern Maker at www.hobbyware.com
- no affiliation, just a satisfied user. Both should be available at the big box stores (michaels, hobby lobby, etc.) Also there are other programs like Easy Cross, and some others I can't remember the name of. A google search should give you web sites.