JPS57163806A - Shape detector - Google Patents
Shape detectorInfo
- Publication number
- JPS57163806A JPS57163806A JP4983381A JP4983381A JPS57163806A JP S57163806 A JPS57163806 A JP S57163806A JP 4983381 A JP4983381 A JP 4983381A JP 4983381 A JP4983381 A JP 4983381A JP S57163806 A JPS57163806 A JP S57163806A
- Authority
- JP
- Japan
- Prior art keywords
- steel plate
- arithmetic
- external circumference
- external
- detecting
- 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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
Abstract
PURPOSE:To improve precision by eliminating disturbance in detecting the shape of a steel material by radiant light, by applying an external circumference tracking method by processing a data group showing radiation intensity by histogram arithmetic and spatial differential arithmetic. CONSTITUTION:Radiant light on the detection line 3a of a red-heated steel plate 1 is image formed through a lens 2 on a photoelectric element group 3, whose output is amplified and then quantized into bits by a quantizing device 5 to be stored in a memory 16. Although a blur due to reflection, scattering, etc., from a circumferential body appears at the external circumference 9c of the steel plate, this part is at low temperature, so a valley having a minimum frequency on a temperature histogram is regarded as a threshold level to eliminate a part 9'c in binary-coding process, thus eliminating the blur. Then, a data group is processed by spatial differential arithmetic 18 to emphasize only the external circumference edge of the steel plate because the external circumference edge part has a greater temperature difference than a scale 9a and a over-heated part 9b. External track arithmetic 19 is performed to find the maximum value of the differential value as a track, thus detecting the shape of the steel plate.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4983381A JPS57163806A (en) | 1981-04-01 | 1981-04-01 | Shape detector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4983381A JPS57163806A (en) | 1981-04-01 | 1981-04-01 | Shape detector |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57163806A true JPS57163806A (en) | 1982-10-08 |
JPS6363042B2 JPS6363042B2 (en) | 1988-12-06 |
Family
ID=12842077
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4983381A Granted JPS57163806A (en) | 1981-04-01 | 1981-04-01 | Shape detector |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57163806A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4905149A (en) * | 1987-08-20 | 1990-02-27 | Fuji Photo Film Co., Ltd. | Method of determining desired image signal range |
-
1981
- 1981-04-01 JP JP4983381A patent/JPS57163806A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4905149A (en) * | 1987-08-20 | 1990-02-27 | Fuji Photo Film Co., Ltd. | Method of determining desired image signal range |
Also Published As
Publication number | Publication date |
---|---|
JPS6363042B2 (en) | 1988-12-06 |
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