By OMR, do you mean Optical Music Recognition, or Optical Mark
Recognition? (Or something else?)
If you mean Optical Music Recognition, take a look at Audiveris
(
https://audiveris.kenai.com)
If you mean Optical Mark Recognition, take a look at QueXF
(
https://code.launchpad.net/quexf)
Tesseract won't be much use in either case, but Audiveris uses
Tesseract for OCR of textual elements in sheet music.
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<Sefam> Are any of the mentors around?
<jimregan> yes, they're the ones trolling you