GB1183650A - Pattern Recognition. - Google Patents

Pattern Recognition.

Info

Publication number
GB1183650A
GB1183650A GB49072/68A GB4907268A GB1183650A GB 1183650 A GB1183650 A GB 1183650A GB 49072/68 A GB49072/68 A GB 49072/68A GB 4907268 A GB4907268 A GB 4907268A GB 1183650 A GB1183650 A GB 1183650A
Authority
GB
United Kingdom
Prior art keywords
pattern
raised
constant
square
known patterns
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
GB49072/68A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
International Business Machines Corp
Original Assignee
International Business Machines 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 International Business Machines Corp filed Critical International Business Machines Corp
Publication of GB1183650A publication Critical patent/GB1183650A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V10/00—Arrangements for image or video recognition or understanding
    • G06V10/88—Image or video recognition using optical means, e.g. reference filters, holographic masks, frequency domain filters or spatial domain filters

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Theoretical Computer Science (AREA)
  • Character Discrimination (AREA)
  • Image Analysis (AREA)

Abstract

1,183,650. Pattern recognition; square root, exponential circuits. INTERNATIONAL BUSINESS MACHINES CORP. 16 Oct., 1968 [13 Nov., 1967], No. 49072/68. Headings G4G and G4R. [Also in Division G2] In pattern recognition apparatus, the unknown pattern is correlated with known patterns, signals from each correlation being raised as exponents to a constant to give signals which are summed for each known pattern separately, the largest sum being detected to identify the unknown pattern. An unknown pattern is correlated optically with masks of known patterns, the light from each correlation being detected by a respective 3 x 3 matrix of photocells. The outputs of each matrix are fed through non-linear diodes to a respective summing network. The outputs of the summing networks are compared, the largest identifying the pattern. Each non-linear diode produces an output equal to a constant (e.g. the base of natural logarithms) raised to its input as exponent. The masks of known patterns may be in hologram form in which case each photocell output is square-rooted (to get from intensity to amplitude) before being raised as exponent to the constant. Fig. 5 shows a circuit for this, comprising a photo-detecting junction 62B (input), an insulated-gate field-effect transistor 78 for the square-rooting, and a non- linear diode 76 for the exponentiation.
GB49072/68A 1967-11-13 1968-10-16 Pattern Recognition. Expired GB1183650A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US68235167A 1967-11-13 1967-11-13

Publications (1)

Publication Number Publication Date
GB1183650A true GB1183650A (en) 1970-03-11

Family

ID=24739314

Family Applications (1)

Application Number Title Priority Date Filing Date
GB49072/68A Expired GB1183650A (en) 1967-11-13 1968-10-16 Pattern Recognition.

Country Status (3)

Country Link
DE (1) DE1808261A1 (en)
FR (1) FR1592167A (en)
GB (1) GB1183650A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4912778B1 (en) * 1969-11-05 1974-03-27
US4178516A (en) * 1977-11-25 1979-12-11 Ball Corporation Mold reader

Also Published As

Publication number Publication date
FR1592167A (en) 1970-05-11
DE1808261A1 (en) 1969-06-12

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee