Circuit for sharpening of edges of a pixel image in a color copi

Details Circuit for sharpening of edges of a pixel image in a color copi Circuit for sharpening of edges of a pixel image in a color copi

1996-06-07

1999-01-19

Lee, Thomas D.

Image analysis

Image enhancement or restoration

Edge or contour enhancement

382254, 382205, G06K 940

Patent

active

058622667

ABSTRACT:
A circuit for sharpening a pixel image includes M accumulators which provide a rolling sum for each of a sequence of image pixel values. Each rolling sum comprises the sum of pixel values in the accumulator, all pixel values resident in the M accumulators comprising an array of pixel values, with one such accumulator including a central array pixel value. M inputs apply a sequence of at least N image pixel values to each of the M accumulators. Each sequence of N image pixel values is logically arrayed along a first dimension of the image and each sequence changes as each new image pixel value is input and an oldest image pixel value is removed. Each time a new image pixel is input to an accumulator, the accumulator outputs a new rolling sum of the image pixel values present therein. An arithmetic circuit determines from each set of M rolling sums, an average pixel value of the array of image pixel values, and then derives a difference between the central image pixel value and the average image pixel value. This arithmetic action arrives at a filtered central image pixel value which is substituted for the central image pixel value, thereby achieving a high boost filtering of the pixel image.

REFERENCES:
patent: 5163100 (1992-11-01), Mathieu et al.
patent: 5668895 (1997-09-01), Yamazaki et al.

Affiliated with

Also associated with

Rating

Circuit for sharpening of edges of a pixel image in a color copi does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Circuit for sharpening of edges of a pixel image in a color copi, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Circuit for sharpening of edges of a pixel image in a color copi will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1253294