JPS6479882A - Image pickup type boundary detector - Google Patents

Image pickup type boundary detector

Info

Publication number
JPS6479882A
JPS6479882A JP62237927A JP23792787A JPS6479882A JP S6479882 A JPS6479882 A JP S6479882A JP 62237927 A JP62237927 A JP 62237927A JP 23792787 A JP23792787 A JP 23792787A JP S6479882 A JPS6479882 A JP S6479882A
Authority
JP
Japan
Prior art keywords
working area
differential value
value
contrast
size
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
JP62237927A
Other languages
Japanese (ja)
Inventor
Masahiko Hayashi
Yasuo Fujii
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.)
Kubota Corp
Original Assignee
Kubota 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 Kubota Corp filed Critical Kubota Corp
Priority to JP62237927A priority Critical patent/JPS6479882A/en
Publication of JPS6479882A publication Critical patent/JPS6479882A/en
Pending legal-status Critical Current

Links

Landscapes

  • Image Processing (AREA)
  • Image Analysis (AREA)

Abstract

PURPOSE:To execute proper binarization even when the size of a found differential value is changed by providing the titled device with a threshold correcting means for correcting a set threshold based on the size of a differential value found out by a differential means. CONSTITUTION:When the contrast between an unprocessed working area and a processed working area is low, the maximum value of a differential value is reduced, and the value is increased in accordance with the increase of the contrast. Thereby, even when a differential value is varied from a proper range corresponding to previously set threshold, proper binarization corresponding to the variation can be executed by correcting the set threshold so as to increase in accordance with the increment of the maximum value of the differential value. Even when the contrast between the unprocessed working area and the processed working area is varied due to variation in the state of the working area or weather, proper binarization can be attained independently of the size of a differential value.
JP62237927A 1987-09-22 1987-09-22 Image pickup type boundary detector Pending JPS6479882A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62237927A JPS6479882A (en) 1987-09-22 1987-09-22 Image pickup type boundary detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62237927A JPS6479882A (en) 1987-09-22 1987-09-22 Image pickup type boundary detector

Publications (1)

Publication Number Publication Date
JPS6479882A true JPS6479882A (en) 1989-03-24

Family

ID=17022520

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62237927A Pending JPS6479882A (en) 1987-09-22 1987-09-22 Image pickup type boundary detector

Country Status (1)

Country Link
JP (1) JPS6479882A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6371582B1 (en) 1998-05-29 2002-04-16 Nec Corporation Device for preventing thin apparatus from overturning

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50111941A (en) * 1974-02-12 1975-09-03
JPS5531947A (en) * 1978-08-29 1980-03-06 Tokyo Shibaura Electric Co Valve opening and shutting device for atomic power plant
JPS6270916A (en) * 1985-09-24 1987-04-01 Kubota Ltd Boundary detecting method for self-traveling truck

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50111941A (en) * 1974-02-12 1975-09-03
JPS5531947A (en) * 1978-08-29 1980-03-06 Tokyo Shibaura Electric Co Valve opening and shutting device for atomic power plant
JPS6270916A (en) * 1985-09-24 1987-04-01 Kubota Ltd Boundary detecting method for self-traveling truck

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6371582B1 (en) 1998-05-29 2002-04-16 Nec Corporation Device for preventing thin apparatus from overturning

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