Method and apparatus for dividing an input image into a pluralit

Details Method and apparatus for dividing an input image into a pluralit Method and apparatus for dividing an input image into a pluralit

1997-03-12

1999-07-06

Au, Amella

Image analysis

Image enhancement or restoration

Image filter

382275, 248606, G06K 940

Patent

active

059206527

ABSTRACT:
A method and apparatus for processing an input image by converting an input frame of a predetermined number of pixels into a plurality of output frames, the spatial frequency spectrum of each of said plurality of output frames being that of a respective predetermined frequency band of the spatial frequency spectrum of the input frame, the processing including filtering the input frame in one direction so as to produce a first output frame of said predetermined number of pixels, the first output frame having only one of the high spatial frequencies and the low spatial frequencies of said input frame in said one direction, and subtracting said first output frame from said input frame so as to produce a second output frame of said predetermined number of pixels, the second output frame having the other of the high spatial frequencies and the low spatial frequencies of said input signal in said one direction.

REFERENCES:
patent: 5343309 (1994-08-01), Roetling
patent: 5384869 (1995-01-01), Wilkinson et al.

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