Classifications

• • G—PHYSICS
  • G06—COMPUTING OR CALCULATING; COUNTING
  • G06F—ELECTRIC DIGITAL DATA PROCESSING
  • G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
  • G06F17/10—Complex mathematical operations
  • G06F17/14—Fourier, Walsh or analogous domain transformations, e.g. Laplace, Hilbert, Karhunen-Loeve, transforms
  • G06F17/145—Square transforms, e.g. Hadamard, Walsh, Haar, Hough, Slant transforms
• • G—PHYSICS
  • G06—COMPUTING OR CALCULATING; COUNTING
  • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
  • G06V10/00—Arrangements for image or video recognition or understanding
  • G06V10/40—Extraction of image or video features
  • G06V10/42—Global feature extraction by analysis of the whole pattern, e.g. using frequency domain transformations or autocorrelation
  • G06V10/431—Frequency domain transformation; Autocorrelation
• • 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
  • G06V30/14—Image acquisition
  • G06V30/142—Image acquisition using hand-held instruments; Constructional details of the instruments
  • G06V30/1423—Image acquisition using hand-held instruments; Constructional details of the instruments the instrument generating sequences of position coordinates corresponding to handwriting
• • G—PHYSICS
  • G07—CHECKING-DEVICES
  • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
  • G07C9/00—Individual registration on entry or exit
  • G07C9/30—Individual registration on entry or exit not involving the use of a pass
  • G07C9/32—Individual registration on entry or exit not involving the use of a pass in combination with an identity check
  • G07C9/35—Individual registration on entry or exit not involving the use of a pass in combination with an identity check by means of a handwritten signature

Landscapes

• Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Theoretical Computer Science (AREA)
• Mathematical Physics (AREA)
• Multimedia (AREA)
• Computational Mathematics (AREA)
• Mathematical Optimization (AREA)
• Pure & Applied Mathematics (AREA)
• Data Mining & Analysis (AREA)
• Computer Vision & Pattern Recognition (AREA)
• Mathematical Analysis (AREA)
• General Engineering & Computer Science (AREA)
• Software Systems (AREA)
• Databases & Information Systems (AREA)
• Algebra (AREA)
• Compression, Expansion, Code Conversion, And Decoders (AREA)
• Collating Specific Patterns (AREA)
• Complex Calculations (AREA)
• Image Analysis (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=23081437

Family Applications (1)

Country Status (10)

Families Citing this family (5)

• 1973
  • 1973-03-06 GB GB1095473A patent/GB1400374A/en not_active Expired
  • 1973-04-02 FR FR7311774A patent/FR2197277B1/fr not_active Expired
  • 1973-07-30 CA CA177,568A patent/CA1019837A/en not_active Expired
  • 1973-08-02 NL NL7310683A patent/NL7310683A/xx not_active Application Discontinuation
  • 1973-08-06 CH CH1137073A patent/CH576677A5/xx not_active IP Right Cessation
  • 1973-08-06 BE BE134254A patent/BE803237A/xx unknown
  • 1973-08-07 IT IT27624/73A patent/IT1003118B/it active
  • 1973-08-08 JP JP48089190A patent/JPS4987255A/ja active Pending
  • 1973-08-08 DE DE2340110A patent/DE2340110C3/de not_active Expired
  • 1973-08-17 BR BR6381/73A patent/BR7306381D0/pt unknown

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