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PHYSICS
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G06
COMPUTING; CALCULATING OR COUNTING
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G06V
IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
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G06V30/00
Character recognition; Recognising digital ink; Document-oriented image-based pattern recognition
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G06V30/40
Document-oriented image-based pattern recognition
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G06V30/42
based on the type of document
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G06V30/422
Technical drawings; Geographical maps
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