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US 4,700,224 AGranted
Method of image processing for the measurement of tool wear
AssigneesAgency of Industrial Science and Technology, Ministry of International Trade & Industry
InventorsKaneyoshi Miyasaka, Nobushige Sawai, Ryoji Murata
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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.
Claims3
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.
3 more elements
Dependencies are inferred from the claim text.