US4700224A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of image processing for the measurement of tool wear
Assignee: National Institute of Advanced Industrial Science and Technology
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Filing: 1986-03-28
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Granted: 1987-10-13
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Expires: 2006-03-28
Abstract
Abstract An image processing system adapted to measure tool wear by imaging the worn portion of a tool with an ITV to produce images thereof together with surrounding portions, comparing the brightness distributions of the images with each other, and carrying out image processing by use of a brightness threshold value set at a boundary between a region wherein variation of the brightness distribution occurs and a region wherein it does not occur.
Inventors
- 👤 Kaneyoshi Miyasaka
- 👤 Nobushige Sawai
- 👤 Ryoji Murata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:21
CPC Classifications
G; G01; G01N; G01N3/00; G01N3/56; B; B23; B23Q; B23Q17/00; B23Q17/09; B23Q17/24; G01N3/02; G01N3/06; G01N3/068; G06; G06T; G06T7/00; G06T7/0002; G06T7/0004; G06T7/10; G06T7/136; G01N2203/00; G01N2203/02; G01N2203/022; G01N2203/0244; G01N2203/06; G01N2203/0641; G01N2203/0647; G06T2207/00; G06T2207/30; G06T2207/30108; G06T2207/30164
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
148 words
A method image processing for the measurement of tool wear comprising the steps of: producing an image of a worn portion of a tool together with surrounding portions by means of television camera; defining a window framing a region of said image corresponding to the worn portion and portions other than the worn portion; measuring the brightness distribution within the region framed by the window, comparing said brightness distribution with the brightness distribution within a region framed by a window expanded to frame the region framed by said window together with additional portions other than the worn portion, setting a brightness threshold value at a brightness value falling between a region wherein variation of the brightness distribution occurs and a region in which it does not occur; and digitizing image formation in the binary system using the so-obtained theshold value and displaying an image of the worn portion.
Claim 2
Independent Claim
148 words
A method image processing for the measurement of tool wear comprising the steps of: producing an image of a worn portion of a tool together with surrounding portions by means of television camera; defining a window framing a region of said image corresponding to the worn portion and portions other than the worn portion; measuring the brightness distribution within the region framed by the window, comparing said brightness distribution with the brightness distribution within a region framed by a window expanded to frame the region framed by said window together with additional portions other than the worn portion, setting a brightness threshold value at a brightness value falling between a region wherein variation of the brightness distribution occurs and a region in which it does not occur; and digitizing image formation in the binary system using the so-obtained theshold value and displaying an image of the worn portion.
Claim 3
Dependent Claim
30 words
A method for measurement of tool wear according to claim 1 wherein the portions other than the worn portion are an unworn portion and a background portion of the tool.
Claim 4
Dependent Claim
41 words
A method for measurement of tool wear according to claim 1 wherein an image of the wear portion is displayed by using the brightness threshold value to bidirectionally scan the image information from top to bottom and from bottom to top.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-10-12 | 1991-04-13 | 1991-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-10-12 | 1995-04-13 | 1995-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-10-12 | 1999-04-13 | 1999-10-13 | $7700.00 | Window Closed / Lapsed |