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Publication of FR494411ApublicationCriticalpatent/FR494411A/fr
G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
G06K7/02—Methods or arrangements for sensing record carriers, e.g. for reading patterns by pneumatic or hydraulic means, e.g. sensing punched holes with compressed air; by sonic means ; by ultrasonic means
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Engineering & Computer Science
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Computer Vision & Pattern Recognition
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General Physics & Mathematics
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Theoretical Computer Science
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Devices For Checking Fares Or Tickets At Control Points
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