JPS6451586A - Binarization threshold calculating device for picture - Google Patents
Binarization threshold calculating device for pictureInfo
- 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
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.
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)
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)
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 |
-
1987
- 1987-08-22 JP JP62208849A patent/JP2646569B2/en not_active Expired - Lifetime
Patent Citations (2)
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)
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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