Χαίρετε, ὦ συμμαθηταί – ἰδού με μετὰ καιρὸν ἀνακάμπτοντα.
FOR LINUX (e.g. UBUNTU) USERS:
Classical Greek OCR has long been satisfactorily addressed by the usual supplied scanning/OCR software
(such as “gscan2pdf”, μεταξὺ ἄλλων)
“Tesseract-ocr” is an already mentioned free tool specially conceived for classical Greek, highly recommended.
Then, it may be useful to search the Internet for → “Greek and Latin digital tools”
May I also suggest another good starting point: himeros.eu (especially the part “Ancient Greek OCR Trainings”)