JPS6419481A - Image pickup type boundary detecting device - Google Patents

Image pickup type boundary detecting device

Info

Publication number
JPS6419481A
JPS6419481A JP62176411A JP17641187A JPS6419481A JP S6419481 A JPS6419481 A JP S6419481A JP 62176411 A JP62176411 A JP 62176411A JP 17641187 A JP17641187 A JP 17641187A JP S6419481 A JPS6419481 A JP S6419481A
Authority
JP
Japan
Prior art keywords
picture element
image pickup
binarization
threshold level
differentiation
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.)
Granted
Application number
JP62176411A
Other languages
Japanese (ja)
Other versions
JPH0634229B2 (en
Inventor
Yasuo Fujii
Masahiko Hayashi
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 JP62176411A priority Critical patent/JPH0634229B2/en
Publication of JPS6419481A publication Critical patent/JPS6419481A/en
Publication of JPH0634229B2 publication Critical patent/JPH0634229B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Image Analysis (AREA)

Abstract

PURPOSE:To exactly obtain binarization image information corresponding to a boundary, without using a special lighting means, by setting a threshold level for executing a binarization, based on the magnitude of a differentiation value so that a picture element apart from an image pickup distance is smaller than a picture element of a near part. CONSTITUTION:The titled device is provided with a differentiation means 100 for deriving a differentiation value of each picture element, based on a detection value of brightness of each picture element arranged in the two-dimensional direction from image pickup information of an image pickup means S1, and a binarization means 101 for extracting a picture element of brightness exceeding a set threshold level, based on this differentiation value. Also, this device is provided with a threshold level setting means 102 for setting a binary threshold level to each picture element, so that a picture element apart from an image pickup distance becomes smaller than a picture element corresponding to a near part. Accordingly, the binarization can be executed exactly in spite of the difference of brightness caused by whether the image pickup distance is distant or near. In such a way, image information corresponding to a boundary can be obtained exactly in the whole image pickup visual field without using a special lighting means.
JP62176411A 1987-07-15 1987-07-15 Imaging type boundary detection device Expired - Lifetime JPH0634229B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62176411A JPH0634229B2 (en) 1987-07-15 1987-07-15 Imaging type boundary detection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62176411A JPH0634229B2 (en) 1987-07-15 1987-07-15 Imaging type boundary detection device

Publications (2)

Publication Number Publication Date
JPS6419481A true JPS6419481A (en) 1989-01-23
JPH0634229B2 JPH0634229B2 (en) 1994-05-02

Family

ID=16013212

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62176411A Expired - Lifetime JPH0634229B2 (en) 1987-07-15 1987-07-15 Imaging type boundary detection device

Country Status (1)

Country Link
JP (1) JPH0634229B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009005806A (en) * 2007-06-27 2009-01-15 Fujishoji Co Ltd Pinball game machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009005806A (en) * 2007-06-27 2009-01-15 Fujishoji Co Ltd Pinball game machine

Also Published As

Publication number Publication date
JPH0634229B2 (en) 1994-05-02

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