Large kernel filtering using a fixed-size block processor

Details Large kernel filtering using a fixed-size block processor Large kernel filtering using a fixed-size block processor

1996-08-13

1998-05-05

Rogers, Scott

Image analysis

Image compression or coding

Transform coding

382260, 358433, G06T 900, H04N 1415

Patent

active

057487928

ABSTRACT:
A method and system for filtering a digital image with a filter larger than the hardware capabilities of the imaging system is workable by subdividing the large filter into a number of small filters which can each be individually processed by the system. The method includes the steps of: segmenting the digital image into data blocks of a predetermined size; overlapping adjacent data blocks by a predetermined number of pixels; providing a preselected filter kernel; generating small filters by processing a preselected group of components of the filter kernel; applying each of the small filters to each overlapped data block to produce component data blocks; and merging and saving the component data blocks into filtered data blocks according to a predetermined specific criteria, whereby the filtered data blocks represent the filtered digital image.

REFERENCES:
patent: 4442454 (1984-04-01), Powell
patent: 4918742 (1990-04-01), Simonds
patent: 4984286 (1991-01-01), Dolazza
patent: 5168375 (1992-12-01), Reisch et al.
patent: 5563718 (1996-10-01), Wober et al.

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