US3587046A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slope detecting pattern recognizing system for determining a line pattern
Assignee: Fujitsu Ltd
•
Filing: 1968-08-02
•
Granted: 1971-06-22
•
Expires: 1988-08-02
Abstract
Abstract A line pattern is scanned in mutually perpendicular coplanar directions and the rising and decaying parts of the scanning signals produced are detected in each of the directions to provide rising and decaying signals. The rising and decaying signals are used to produce line detecting signals in accordance with the slopes of the lines of the line pattern. A field is detected in which the line pattern exists within the field of the scanning signals and a plurality of observing fields are set within the field. The line detecting signals classified by the slopes of lines within the observing fields are counted and various strokes are detected, and the line pattern is discriminated by the combination of the detected strokes.
Inventors
- 👤 Nobuyuki Tanaka
- 👤 Naoki Morimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:13
CPC Classifications
G; G06; G06V; G06V10/00; G06V10/40; G06V10/44
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
198 words
A pattern recognizing system for determining a line pattern, said system comprising reading means for scanning the line pattern in mutually perpendicular coplanar directions and for providing scanning signals in accordance with such scanning; detector means connected to said reading means for detecting the rising and decaying parts of said scanning signals in each of said directions and for providing rising and decaying signals in accordance with such detecting; slope discriminating means connected to said detector means for classifying said rising and decaying signals into line detecting signals in accordance with the slopes of the lines of said line pattern; scanning field position detecting means connected to said reading means for detecting a field in which the line pattern exists within the field of the scanning signals and for setting a plurality of observing fields within said field; stroke detecting means connected to said slope discriminating means and to said scanning field position detecting means for counting said line detecting signals classified by the slopes of lines within said observing fields and for detecting various strokes; and character discriminating means connected to said stroke detecting means for discriminating the line pattern by the combination of the detected strokes.
Claim 2
Dependent Claim
198 words
A pattern recognizing system for determining a line pattern, said system comprising reading means for scanning the line pattern in mutually perpendicular coplanar directions and for providing scanning signals in accordance with such scanning; detector means connected to said reading means for detecting the rising and decaying parts of said scanning signals in each of said directions and for providing rising and decaying signals in accordance with such detecting; slope discriminating means connected to said detector means for classifying said rising and decaying signals into line detecting signals in accordance with the slopes of the lines of said line pattern; scanning field position detecting means connected to said reading means for detecting a field in which the line pattern exists within the field of the scanning signals and for setting a plurality of observing fields within said field; stroke detecting means connected to said slope discriminating means and to said scanning field position detecting means for counting said line detecting signals classified by the slopes of lines within said observing fields and for detecting various strokes; and character discriminating means connected to said stroke detecting means for discriminating the line pattern by the combination of the detected strokes.
Claim 3
Dependent Claim
65 words
A pattern recognizing system as claimed in claim 1, wherein the rising part of a scanning signal is detected as the point of change from a blank part to a printed part of the line pattern relative to each of said directions and the decaying part of a scanning signal is detected as the point of change from a printed part to a blank part.
Claim 4
Dependent Claim
23 words
A Pattern recognizing system as claimed in claim 1, further comprising delay means interposed between said detector means and said slope discriminating means.
Claim 5
Dependent Claim
52 words
A pattern recognizing system as claimed in claim 1, wherein said detector means comprises a detector for detecting the rising and decaying parts of said scanning signals in one of said directions and a detector for detecting the rising and decaying parts of said scanning signals in the other of said directions.
Claim 6
Dependent Claim
25 words
A pattern recognizing system as claimed in claim 1, wherein said scanning field position detecting means comprises a field divider for forming a quadrilateral field.
Claim 7
Dependent Claim
22 words
A pattern recognizing system as claimed in claim 1, wherein the directions of scanning of said line pattern are horizontal and vertical.
Claim 8
Dependent Claim
29 words
A pattern recognizing system as claimed in claim 1, wherein said reading means comprises a plurality of photoresponsive elements and amplifying means connected to the outputs of said elements.
Claim 9
Independent Claim
129 words
A method for determining a line pattern, comprising the steps of scanning a line pattern in mutually perpendicular coplanar directions and providing scanning signals in accordance with such scanning; detecting the rising and decaying parts of the scanning signals and providing rising and decaying signals in accordance with such detecting; classifying the rising and decaying signals into line detecting signals in accordance with the slopes of the lines of the line pattern; detecting a field in which the line pattern exists within the field of the scanning signals and setting a plurality of observing fields within the field; counting the line detecting signals classified by the slopes of lines within the observing fields and detecting various strokes; and discriminating the line pattern by the combination of the detected strokes.
Claim 10
Independent Claim
129 words
A method for determining a line pattern, comprising the steps of scanning a line pattern in mutually perpendicular coplanar directions and providing scanning signals in accordance with such scanning; detecting the rising and decaying parts of the scanning signals and providing rising and decaying signals in accordance with such detecting; classifying the rising and decaying signals into line detecting signals in accordance with the slopes of the lines of the line pattern; detecting a field in which the line pattern exists within the field of the scanning signals and setting a plurality of observing fields within the field; counting the line detecting signals classified by the slopes of lines within the observing fields and detecting various strokes; and discriminating the line pattern by the combination of the detected strokes.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-21 | 1974-12-21 | 1975-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-21 | 1978-12-21 | 1979-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-21 | 1982-12-21 | 1983-06-22 | $7700.00 | Window Closed / Lapsed |