JPS6451586A - Binarization threshold calculating device for picture - Google Patents

Binarization threshold calculating device for picture

Info

Publication number
JPS6451586A
JPS6451586A JP62208849A JP20884987A JPS6451586A JP S6451586 A JPS6451586 A JP S6451586A JP 62208849 A JP62208849 A JP 62208849A JP 20884987 A JP20884987 A JP 20884987A JP S6451586 A JPS6451586 A JP S6451586A
Authority
JP
Japan
Prior art keywords
histogram
picture
brightness
picture quality
threshold
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
JP62208849A
Other languages
Japanese (ja)
Other versions
JP2646569B2 (en
Inventor
Atsushi Kuno
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.)
Omron Corp
Original Assignee
Omron Tateisi Electronics Co
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 Omron Tateisi Electronics Co filed Critical Omron Tateisi Electronics Co
Priority to JP62208849A priority Critical patent/JP2646569B2/en
Publication of JPS6451586A publication Critical patent/JPS6451586A/en
Application granted granted Critical
Publication of JP2646569B2 publication Critical patent/JP2646569B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Abstract

PURPOSE:To stably calculate an optimum threshold at high speed according to one scanning by extracting information on a picture in a window, brightness and the propriety of a pattern at the time of calculating the binarization threshold of a multilevel picture and forming the evaluation reference of a picture quality from the information. CONSTITUTION:A window scanning part 11 sets the window on a gradation picture to execute a raster scanning. In an illegal pattern histogram forming part 13, the generating frequency of an illegal pattern is counted at every brightness (threshold) to form an illegal pattern histogram. Similarly, in a brightness histogram forming part 14, the frequency of the respective brightness is counted to form a brightness histogram. At the time of completing the formation of the histogram, both the histograms are used in a picture quality histogram forming part 15 to calculate a picture quality histogram. After smoothing in a histogram smoothing processing part 16, an optimum threshold searching part 17 searches the optimum threshold from the smoothed picture quality histogram and outputs the searching result to a microcomputer 10.
JP62208849A 1987-08-22 1987-08-22 Multi-value image evaluation device and threshold value determination device using the device Expired - Lifetime JP2646569B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62208849A JP2646569B2 (en) 1987-08-22 1987-08-22 Multi-value image evaluation device and threshold value determination device using the device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62208849A JP2646569B2 (en) 1987-08-22 1987-08-22 Multi-value image evaluation device and threshold value determination device using the device

Publications (2)

Publication Number Publication Date
JPS6451586A true JPS6451586A (en) 1989-02-27
JP2646569B2 JP2646569B2 (en) 1997-08-27

Family

ID=16563124

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62208849A Expired - Lifetime JP2646569B2 (en) 1987-08-22 1987-08-22 Multi-value image evaluation device and threshold value determination device using the device

Country Status (1)

Country Link
JP (1) JP2646569B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5201012A (en) * 1990-06-08 1993-04-06 Omron Corporation Image binarization threshold computing apparatus
JP2008040959A (en) * 2006-08-09 2008-02-21 ▲うぇ▼▲ちん▼科技股▲ふん▼有限公司 Passive and interactive immediate image recognition method
JP2010219858A (en) * 2009-03-17 2010-09-30 Seiko Epson Corp Noise component removing device, and medium having noise component removing program recorded thereon

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58163075A (en) * 1982-03-20 1983-09-27 Toshiyuki Sakai Picture quality deciding method of binary linear graphic picture
JPS61225976A (en) * 1985-03-30 1986-10-07 Toshiba Corp Binary-coding system for picture signal

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58163075A (en) * 1982-03-20 1983-09-27 Toshiyuki Sakai Picture quality deciding method of binary linear graphic picture
JPS61225976A (en) * 1985-03-30 1986-10-07 Toshiba Corp Binary-coding system for picture signal

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5201012A (en) * 1990-06-08 1993-04-06 Omron Corporation Image binarization threshold computing apparatus
JP2008040959A (en) * 2006-08-09 2008-02-21 ▲うぇ▼▲ちん▼科技股▲ふん▼有限公司 Passive and interactive immediate image recognition method
JP2010219858A (en) * 2009-03-17 2010-09-30 Seiko Epson Corp Noise component removing device, and medium having noise component removing program recorded thereon

Also Published As

Publication number Publication date
JP2646569B2 (en) 1997-08-27

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