G PHYSICS
G06 COMPUTING OR CALCULATING; COUNTING
G06V IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
G06V30/00 Character recognition; Recognising digital ink; Document-oriented image-based pattern recognition
G06V30/10 Character recognition
G06V30/19 Recognition using electronic means
G06V30/191 Design or setup of recognition systems or techniques; Extraction of features in feature space; Clustering techniques; Blind source separation
G06V30/19173 Classification techniques