Image analysis – Image enhancement or restoration – Image filter
Patent
1997-03-28
1999-06-01
Rogers, Scott
Image analysis
Image enhancement or restoration
Image filter
382263, 382264, 382302, G06T 500, G06T 700
Patent
active
059095164
ABSTRACT:
An apparatus and concomitant method for decomposing an image stream into units of local contrast. A temporal contrast transform (pyramid), comprises a spatial filter, a cascade of lowpass temporal filters and a plurality of subtractors and dividers. The spatial filter is followed by a cascade of lowpass temporal filters, producing a set of temporally lowpass, spatially low pass images. Adjacent filter outputs are then subtracted, producing a set of temporally bandpass (Laplacian) images. Finally, each Laplacian image is divided by a lower level temporal lowpass image, to produce a set of temporally bandpass contrast images.
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Billings Chad J.
Burke William J.
Rogers Scott
Sarnoff Corporation
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