JPS56108181A - Feature point searching device - Google Patents

Feature point searching device

Info

Publication number
JPS56108181A
JPS56108181A JP892480A JP892480A JPS56108181A JP S56108181 A JPS56108181 A JP S56108181A JP 892480 A JP892480 A JP 892480A JP 892480 A JP892480 A JP 892480A JP S56108181 A JPS56108181 A JP S56108181A
Authority
JP
Japan
Prior art keywords
sensor
lens
successively
searched
extent
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
JP892480A
Other languages
Japanese (ja)
Inventor
Koichi Honma
Koichi Ihara
Akira Tsuboi
Fuminobu Furumura
Mitsutaka Kosaka
Yutaka Kubo
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP892480A priority Critical patent/JPS56108181A/en
Publication of JPS56108181A publication Critical patent/JPS56108181A/en
Pending 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
    • G06V10/20—Image preprocessing
    • G06V10/24—Aligning, centring, orientation detection or correction of the image

Abstract

PURPOSE:To eliminate the searching error, by giving a stepped variation to the sampling interval and the extent of the load function and then obtaining a highly accurate peak positions successively while securing a peak position at each step. CONSTITUTION:The 2-dimensional pattern on the picture 1 is formed into an image to the digital optical sensor 3 through the fish-eye lens 2, and then the feature point on the image 1 is searched. In this case, the sampling interval of the sensor 3 which is distant away from the optical axis 4 is increased by the characteristics of the lens 2. The lens 2 and the sensor 3 are mounted on the optical device 7 which can be moved by the driving device 6. The output of the sensor 3 is divided equally into three parts according to the distance from the axis 4 and then connected to the terminals 8a-8c successively via the data outside the sensor 3. At the same time, the feature patterns to be searched are stored in the memory devices 10a-10c respectively, and the correlation is obtained by the correlation unit 12 between the feature pattern and the output of the 3-divided part of the sensor 3. Then the smapling interval and the extent of the load function are switched successively to the lower step by the multiplexers 9-11. The device 7 is moved to obtain the peak position at each step. Thus the searching error can be eliminated.
JP892480A 1980-01-29 1980-01-29 Feature point searching device Pending JPS56108181A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP892480A JPS56108181A (en) 1980-01-29 1980-01-29 Feature point searching device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP892480A JPS56108181A (en) 1980-01-29 1980-01-29 Feature point searching device

Publications (1)

Publication Number Publication Date
JPS56108181A true JPS56108181A (en) 1981-08-27

Family

ID=11706195

Family Applications (1)

Application Number Title Priority Date Filing Date
JP892480A Pending JPS56108181A (en) 1980-01-29 1980-01-29 Feature point searching device

Country Status (1)

Country Link
JP (1) JPS56108181A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02159682A (en) * 1988-12-13 1990-06-19 Yaskawa Electric Mfg Co Ltd Template matching system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5144830A (en) * 1974-10-16 1976-04-16 Hitachi Ltd ZUKEISO KANSOCHI
JPS5214112A (en) * 1975-07-24 1977-02-02 Nissan Motor Co Ltd Torch iginition system internal combustion engine
JPS5291331A (en) * 1976-01-26 1977-08-01 Hitachi Ltd Pattern position detector

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5144830A (en) * 1974-10-16 1976-04-16 Hitachi Ltd ZUKEISO KANSOCHI
JPS5214112A (en) * 1975-07-24 1977-02-02 Nissan Motor Co Ltd Torch iginition system internal combustion engine
JPS5291331A (en) * 1976-01-26 1977-08-01 Hitachi Ltd Pattern position detector

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02159682A (en) * 1988-12-13 1990-06-19 Yaskawa Electric Mfg Co Ltd Template matching system

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