JPS5720878A - Pattern recognizer - Google Patents

Pattern recognizer

Info

Publication number
JPS5720878A
JPS5720878A JP9576480A JP9576480A JPS5720878A JP S5720878 A JPS5720878 A JP S5720878A JP 9576480 A JP9576480 A JP 9576480A JP 9576480 A JP9576480 A JP 9576480A JP S5720878 A JPS5720878 A JP S5720878A
Authority
JP
Japan
Prior art keywords
binary
signal
image pickup
coded
shading
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
JP9576480A
Other languages
Japanese (ja)
Inventor
Keiichi Okamoto
Yasuhiko Hara
Yukio Uto
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 JP9576480A priority Critical patent/JPS5720878A/en
Publication of JPS5720878A publication Critical patent/JPS5720878A/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
    • G06V10/28—Quantising the image, e.g. histogram thresholding for discrimination between background and foreground patterns

Abstract

PURPOSE:To obtain a binary coded output which receives no effect of shading, etc., by using plural image pickup devices and using the output of image pickup device of one side as a binary-coded threshold signal. CONSTITUTION:A detection pattern 4 is projected to an image pickup devices 7 and 9 through a lens 5. In this case, the device 7 is in focus and the device 9 is out of focus, respectively. Then the signal supplied from the device 9 is amplified to be used as a threshold signal 13, and the signal 13 is compared with a signal 12 of the device 7 after receiving an amplification 8 through a comparator 11 to obtain a binary-coded output. In such way, the pattern information itself contributes to the decision of the threshold value of binary coding. Thus an accurate binary coding is possible with a high resistance to the shading, uneven illumination, etc.
JP9576480A 1980-07-15 1980-07-15 Pattern recognizer Pending JPS5720878A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9576480A JPS5720878A (en) 1980-07-15 1980-07-15 Pattern recognizer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9576480A JPS5720878A (en) 1980-07-15 1980-07-15 Pattern recognizer

Publications (1)

Publication Number Publication Date
JPS5720878A true JPS5720878A (en) 1982-02-03

Family

ID=14146547

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9576480A Pending JPS5720878A (en) 1980-07-15 1980-07-15 Pattern recognizer

Country Status (1)

Country Link
JP (1) JPS5720878A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59144918A (en) * 1982-12-08 1984-08-20 テキサス・インスツルメンツ・インコ−ポレイテツド Method and apparatus for positioning specified pattern
JPS60134693A (en) * 1983-12-23 1985-07-17 Shimadzu Corp Picture processor
JP3025391U (en) * 1995-12-01 1996-06-11 禎 助川 Portable mud treatment device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59144918A (en) * 1982-12-08 1984-08-20 テキサス・インスツルメンツ・インコ−ポレイテツド Method and apparatus for positioning specified pattern
JPS60134693A (en) * 1983-12-23 1985-07-17 Shimadzu Corp Picture processor
JP3025391U (en) * 1995-12-01 1996-06-11 禎 助川 Portable mud treatment device

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