JPS55162178A - Pattern checker - Google Patents
Pattern checkerInfo
- Publication number
- JPS55162178A JPS55162178A JP6988379A JP6988379A JPS55162178A JP S55162178 A JPS55162178 A JP S55162178A JP 6988379 A JP6988379 A JP 6988379A JP 6988379 A JP6988379 A JP 6988379A JP S55162178 A JPS55162178 A JP S55162178A
- Authority
- JP
- Japan
- Prior art keywords
- frequency distribution
- valley
- peak
- lightness
- levels
- 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 binary-code video signal stably by generating a threshold value by extracting lightness levels of a peak or valley from lightness frequency distribution found by respective scanning lines and then by extracting those levels by a fixed number of scanning lines.
CONSTITUTION: Video signal 3 from pickup unit 2 taking a sequential scan in two dimensions is converted into a digital signal by A/D converting circuit 4. The frequency distribution of values corresponding to lightness levels of every scanning line is obtained by the digital signal, values corresponding to lightness levels showing the peak or valley of the frequency distribution are detected, and the frequency distribution of values corresponding to the lightness levels showing the peak or valley is found extending over many scanning lines. Digital signals of the light levels showing the peak or valley of the frequency distribution are converted by D/A converting circuit 17 into analog signals, by which video signals are binary-coded to obtain picture elements and on the basis of the two-dimensional binary picture-element signals, the shape, position, etc., of a pattern are recognized or checked.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6988379A JPS55162178A (en) | 1979-06-06 | 1979-06-06 | Pattern checker |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6988379A JPS55162178A (en) | 1979-06-06 | 1979-06-06 | Pattern checker |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS55162178A true JPS55162178A (en) | 1980-12-17 |
JPS619671B2 JPS619671B2 (en) | 1986-03-25 |
Family
ID=13415593
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6988379A Granted JPS55162178A (en) | 1979-06-06 | 1979-06-06 | Pattern checker |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55162178A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62229053A (en) * | 1986-03-31 | 1987-10-07 | Mitsubishi Metal Corp | Defect inspection of pellet end face for nuclear fuel |
JPH04319651A (en) * | 1991-04-19 | 1992-11-10 | Inax Corp | Method for inspecting tile unit |
US9447756B2 (en) | 2011-07-21 | 2016-09-20 | Siemens Aktiengesellschaft | Method for operating a static gas turbine, and intake duct for intake air of a gas turbine |
-
1979
- 1979-06-06 JP JP6988379A patent/JPS55162178A/en active Granted
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62229053A (en) * | 1986-03-31 | 1987-10-07 | Mitsubishi Metal Corp | Defect inspection of pellet end face for nuclear fuel |
JPH04319651A (en) * | 1991-04-19 | 1992-11-10 | Inax Corp | Method for inspecting tile unit |
US9447756B2 (en) | 2011-07-21 | 2016-09-20 | Siemens Aktiengesellschaft | Method for operating a static gas turbine, and intake duct for intake air of a gas turbine |
Also Published As
Publication number | Publication date |
---|---|
JPS619671B2 (en) | 1986-03-25 |
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