G'day,
I've tried Sharpeye briefly & found it to be quite accurate, but as someone who learnt piano 40 years ago & gave up 37 years ago, I can still sight read well enough to play a tune into a sequencer faster than I can use a scanning program. An entire score would be different, but for melodies only I recommend this method - even a bad keyboard player can get a MIDI file quickly this way.

Cheers,
Alan