Sweeping spatial filter system and method

Details Sweeping spatial filter system and method Sweeping spatial filter system and method

2006-02-07

2006-02-07

Mancuso, Joseph (Department: 2621)

Image analysis

Image enhancement or restoration

Image filter

C345S440100

Reexamination Certificate

active

06996286

ABSTRACT:
A method of providing a spatially filtered version of an image by selectively modifying image pixel amplitudes as a predetermined function of spatial frequency components of the image pixels includes dividing an overall frequency range of the image into a plurality of constituent frequency ranges. The method provides, for each of the constituent frequency ranges, a spatial filter for receiving the image pixels and producing a filtered output representative of the spatial frequency components of the pixels that are within that constituent frequency range. The method further includes scaling each of the filtered outputs by a scaling factor specific to the associated spatial filter, so as to produce a scaled output. Finally, the method includes combining the scaled outputs to produce a composite output representative of the spatially filtered version of the image. The scaling factors may include a predetermined set of values for a particular filter response, or the scaling factors may be time-varying so that the filter response changes as a function of time.

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patent: 6487528 (2002-11-01), Vossing et al.
patent: 6519533 (2003-02-01), Jeffryes

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