optical character recognition
noun [ U ] electronics, computing specialized uk/ˌɒp.tɪ.kəl ˈkær.ɪk.tə rek.əɡˌnɪʃ.ən/ us/ˌɑːp.tɪ.kəl ˈker.ɪk.tɚ rek.əɡˌnɪʃ.ən/ (abbreviation OCR)
光符识别（用电子仪器识别印刷或书写字符的过程）
the process by which an electronic device recognizes printed or written letters or numbers