Word oriented image smoothing apparatus and method

Details Word oriented image smoothing apparatus and method Word oriented image smoothing apparatus and method

1991-10-10

1992-12-22

Razavi, Michael T.

Image analysis

Histogram processing

For setting a threshold

382 49, 382 51, G06K 944

Patent

active

051739518

ABSTRACT:
An image to be smoothed is represented by a matrix of pixels arranged in a plurality of adjacent scan lines. Each pixel under examination is changed to the value of a predetermined number of pixels in a 3.times.3 pixel neighborhood surrounding the pixel under examination. The image pixels are represented by a sequence of 16 bit digital words, each bit representing a corresponding pixel. The bits of three adjacent words on three adjacent scan lines are accumulated in 16 counters, respectively, with the words shifted so that the 9 bits of each of sixteen 3.times.3 neighborhoods are simultaneously accumulated in the sixteen counters. Each counter is constructed so that when a predetermined number of ONEs is accumulated from the 3.times.3 neighborhoods, the most significant counter stage goes to ONE and remains at ONE irrespective of further accumulation. One of the three words is the word to be smoothed. The most significant stages of the sixteen counters contain the smoothed word corresponding to the word to be smoothed.

REFERENCES:
patent: 4298895 (1981-11-01), Arai et al.
patent: 4805226 (1989-02-01), Guebey
patent: 4949390 (1990-08-01), Iverson et al.
patent: 4962542 (1990-10-01), Klees
patent: 4979136 (1990-12-01), Weiman et al.

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