JPS5773480A - Feature extracting device of picture - Google Patents

Feature extracting device of picture

Info

Publication number
JPS5773480A
JPS5773480A JP55149571A JP14957180A JPS5773480A JP S5773480 A JPS5773480 A JP S5773480A JP 55149571 A JP55149571 A JP 55149571A JP 14957180 A JP14957180 A JP 14957180A JP S5773480 A JPS5773480 A JP S5773480A
Authority
JP
Japan
Prior art keywords
picture
pattern
gravity
center
read
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.)
Pending
Application number
JP55149571A
Other languages
Japanese (ja)
Inventor
Masataka Nagao
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP55149571A priority Critical patent/JPS5773480A/en
Publication of JPS5773480A publication Critical patent/JPS5773480A/en
Pending legal-status Critical Current

Links

Classifications

    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Theoretical Computer Science (AREA)
  • Image Analysis (AREA)

Abstract

PURPOSE:To simplify the constitution of a device, by storing a pattern of a two- dimensional picture, reading out its stored pattern, deriving the center of gravity of the picture, and deriving a feature pattern centering around the center of gravity in accordance with said center of gravity and a read-out pattern area. CONSTITUTION:A clock pulse from a timing circuit 21 is provided to X and Y address counters, 22, 23, and an address of a two-dimensional picture memory 25 is designated by the counters 22, 23. Also, a digital value which has read the two- dimensional picture from a picture input device 24 is stored in the memory 25, a pattern from this memory 25 is read out by address designation of the counters 22, 23, and its read-out pattern is provided to integrators 36, 37, 43 and 44, and a centroid calculating circuit 45. The center of gravity of a picture is calculated by this circuit 45, its calculated centroid is set to centroid X and Y address counters 27, 28, respectively, the vector quantity is derived by subtracting circuits 29, 30 and square-law operator 34, 35, 41 and 42, etc., and positive and negative ad dresses in the X and Y directions, respectively are outputted from the integrators 36, 37, 43 and 44.
JP55149571A 1980-10-24 1980-10-24 Feature extracting device of picture Pending JPS5773480A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55149571A JPS5773480A (en) 1980-10-24 1980-10-24 Feature extracting device of picture

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55149571A JPS5773480A (en) 1980-10-24 1980-10-24 Feature extracting device of picture

Publications (1)

Publication Number Publication Date
JPS5773480A true JPS5773480A (en) 1982-05-08

Family

ID=15478090

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55149571A Pending JPS5773480A (en) 1980-10-24 1980-10-24 Feature extracting device of picture

Country Status (1)

Country Link
JP (1) JPS5773480A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50156856A (en) * 1974-06-06 1975-12-18

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50156856A (en) * 1974-06-06 1975-12-18

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