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
G06V30/40 Document-oriented image-based pattern recognition
G06V30/41 Analysis of document content
G06V30/416 Extracting the logical structure, e.g. chapters, sections or page numbers; Identifying elements of the document, e.g. authors