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IT1003118B - EQUIPMENT FOR SPECTRUM ANALYSIS OF SIGNALS BY MEANS OF THE FUNCTION OF WALSH AND HADAMARD OPERATORS - Google Patents

EQUIPMENT FOR SPECTRUM ANALYSIS OF SIGNALS BY MEANS OF THE FUNCTION OF WALSH AND HADAMARD OPERATORS

Info

Publication number
IT1003118B
IT1003118B IT27624/73A IT2762473A IT1003118B IT 1003118 B IT1003118 B IT 1003118B IT 27624/73 A IT27624/73 A IT 27624/73A IT 2762473 A IT2762473 A IT 2762473A IT 1003118 B IT1003118 B IT 1003118B
Authority
IT
Italy
Prior art keywords
walsh
signals
equipment
function
spectrum analysis
Prior art date
Application number
IT27624/73A
Other languages
Italian (it)
Original Assignee
Burroughs Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Burroughs Corp filed Critical Burroughs Corp
Application granted granted Critical
Publication of IT1003118B publication Critical patent/IT1003118B/en

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR 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; CALCULATING OR 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; CALCULATING OR 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)
  • Pure & Applied Mathematics (AREA)
  • Data Mining & Analysis (AREA)
  • Mathematical Analysis (AREA)
  • Mathematical Optimization (AREA)
  • Multimedia (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Computational Mathematics (AREA)
  • Algebra (AREA)
  • Databases & Information Systems (AREA)
  • Software Systems (AREA)
  • General Engineering & Computer Science (AREA)
  • Collating Specific Patterns (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Complex Calculations (AREA)
  • Image Analysis (AREA)
IT27624/73A 1972-08-21 1973-08-07 EQUIPMENT FOR SPECTRUM ANALYSIS OF SIGNALS BY MEANS OF THE FUNCTION OF WALSH AND HADAMARD OPERATORS IT1003118B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US28241872A 1972-08-21 1972-08-21

Publications (1)

Publication Number Publication Date
IT1003118B true IT1003118B (en) 1976-06-10

Family

ID=23081437

Family Applications (1)

Application Number Title Priority Date Filing Date
IT27624/73A IT1003118B (en) 1972-08-21 1973-08-07 EQUIPMENT FOR SPECTRUM ANALYSIS OF SIGNALS BY MEANS OF THE FUNCTION OF WALSH AND HADAMARD OPERATORS

Country Status (10)

Country Link
JP (1) JPS4987255A (en)
BE (1) BE803237A (en)
BR (1) BR7306381D0 (en)
CA (1) CA1019837A (en)
CH (1) CH576677A5 (en)
DE (1) DE2340110C3 (en)
FR (1) FR2197277B1 (en)
GB (1) GB1400374A (en)
IT (1) IT1003118B (en)
NL (1) NL7310683A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54122244U (en) * 1978-02-17 1979-08-27
US4308522A (en) * 1979-03-19 1981-12-29 Ncr Corporation Identity verification apparatus and method
GB2159998B (en) * 1984-06-07 1988-02-17 Rolls Royce Personal handwriting verification
GB2164186A (en) * 1984-09-04 1986-03-12 Stc Plc Signature verification
EP0442208B1 (en) * 1990-02-16 1995-08-09 Btg International Limited A device and method for verifying personal handwriting

Also Published As

Publication number Publication date
FR2197277A1 (en) 1974-03-22
BE803237A (en) 1973-12-03
CH576677A5 (en) 1976-06-15
DE2340110B2 (en) 1980-06-19
AU5894673A (en) 1975-02-06
JPS4987255A (en) 1974-08-21
DE2340110C3 (en) 1981-04-09
CA1019837A (en) 1977-10-25
GB1400374A (en) 1975-07-16
NL7310683A (en) 1974-02-25
FR2197277B1 (en) 1976-09-10
BR7306381D0 (en) 1974-07-25
DE2340110A1 (en) 1974-03-07

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