Toolchain: hardcopy -> scanned sheet-music -> lilypond?

[Thorsten Jolitz]

Hi List, 

I wonder if anyone discovered a toolchain that would allow to 

 1. scan sheet-music (e.g. solo transcriptions with many many notes
    ...)

 2. convert the scanner-output to lilypond (maybe via an intermediary
    format like xml or so)?

and what kind of software they used for it?

Thanks for any hint.

-- 
cheers,
Thorsten