Edge enhancement and smoothing in digital images

Details Edge enhancement and smoothing in digital images Edge enhancement and smoothing in digital images

1990-09-27

1991-07-09

Brinich, Stephen

Image analysis

Histogram processing

For setting a threshold

382 27, G06K 956

Patent

active

050312278

ABSTRACT:
Edge definition in FLIR images is improved by assigning to each pixel (X) the average intensity value of that 3.times.3 pixel sub-matrix (30a-30i) containing the pixel (X) which exhibits the smallest edge value. Apparatus for obtaining that intensity value in real time is disclosed. This process can be iteratively repeated on the same image, with each iteration creating more enhanced edges and greater area smoothing between edges.

REFERENCES:
patent: 4365304 (1982-12-01), Ruhman et al.
patent: 4703513 (1987-10-01), Gennery
patent: 4731865 (1988-03-01), Sievenpiper
patent: 4797806 (1989-01-01), Krich
patent: 4827533 (1989-05-01), Tanaka
patent: 4860373 (1989-08-01), Hartless et al.
patent: 4918742 (1990-04-01), Simonds

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