Apparatus for determining the degree of consistency of a feature

Details Apparatus for determining the degree of consistency of a feature Apparatus for determining the degree of consistency of a feature

1986-05-21

1988-05-24

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

382 22, 382 41, G06K 948

Patent

active

047471522

ABSTRACT:
The invention concerns an apparatus for determining the degree of consistency of a feature in a region of an image that is divided into discrete picture elements, the feature being represented by vector valued signals, one for each picture element, the vector direction describing the feature class and the vector magnitude describing the certainty in the feature assertion. The invention is characterized by a first unit (4) for weighted summation of the vectors in the region after predetermined rotations thereof, a second unit (5) for weighted summation of the magnitudes of the vectors in the region, and a norming unit (6) for norming the output signal from the first summation unit with respect to the sum of the output signal from the second summation unit and a reference signal (FIG. 2).

REFERENCES:
patent: 3979722 (1976-09-01), Sakoe
patent: 4074231 (1978-02-01), Yajima et al.
patent: 4206441 (1980-06-01), Konda
patent: 4361830 (1982-11-01), Honma et al.
patent: 4509195 (1985-04-01), Nadler
patent: 4618989 (1986-10-01), Tsukune et al.
patent: 4644583 (1987-02-01), Watanabe et al.
Reprinted from Proceedings of the IEEE Computer Society Conference on Pattern Recognition and Image Processing, PRIP 82, Las Vegas, Jun. 1982, "A Consistency Operation for Line and Curve Enhancement"--Martin Hedlund et al., pp. 1-4.

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