Fast digital image sharpening method and structure

Details Fast digital image sharpening method and structure Fast digital image sharpening method and structure

1995-08-21

1999-02-23

Couso, Yon J.

Image analysis

Image enhancement or restoration

Image filter

382266, G06K 940

Patent

active

058752676

ABSTRACT:
An initial digital image is blurred to form a blurred image which is subtracted from the initial image in order to form a sharpened version of the initial image. Unidirectional blurs provide for blurring the initial image, wherein the value of each pixel in the blurred image depends on the values of all the pixels in the original image. One blurring method involves the performance of four unidirectional blurs: a left-right blur, a right-left blur, a top-down blur and a bottom-up blur. In one embodiment, the first three of the above unidirectional blurs are intermingled, thereby resulting in superior access to the image data, i.e. in greater availability of the accessed image data from a cache.

REFERENCES:
patent: 5351305 (1994-09-01), Wood et al.
patent: 5442462 (1995-08-01), Guissin
Rafael C. Gonzalez and Richard E. Woods, Digital Image Processing, pp. 189-201, Addison-Wesley Publishing Company 1993.
Anil K. Jain, Fundamentals of Digital Image Processing, Image Enchancement, pp. 233-266, Prentice-Hall Inc. 1989.
Rhys Lewis, Practical Digital Image Processing, pp. 73-92 and 117-147, Ellis Horwood Limited 1990.

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