Apparatus for discerning the noticeable presence of spatial fluc

Details Apparatus for discerning the noticeable presence of spatial fluc Apparatus for discerning the noticeable presence of spatial fluc

1980-01-07

1981-08-04

Boudreau, Leo H.

Communications: electrical

Digital comparator systems

250572, 3401463Q, 350162SF, 356430, 358106, G06K 900

Patent

active

042825113

ABSTRACT:
The spatial field is sequentially convolved at each of a plurality of uniformly-spaced intervals along a field dimension with a given type of limited spatial extent kernel function which preferably has a one-octave spatial bandwidth. Convolution combining means derives an output only if the q'th power of the sequential convolutions exceed a threshold corresponding to the just-noticeable presence of spatial frequencies within the spatial bandwidth of the kernel function.

REFERENCES:
patent: 3783296 (1974-01-01), Blevins
patent: 3955095 (1976-05-01), Gadbois et al.
patent: 3989387 (1976-11-01), Hategan
patent: 4000949 (1977-01-01), Watkins
patent: 4083627 (1978-04-01), Okano
patent: 4159164 (1979-06-01), Dammann et al.
patent: 4226538 (1980-10-01), Van Beeck

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