Method and apparatus for emphasizing sharpness of image by detec

Details Method and apparatus for emphasizing sharpness of image by detec Method and apparatus for emphasizing sharpness of image by detec

1992-04-06

1997-02-11

Johns, Andrew

Image analysis

Image enhancement or restoration

Image filter

382266, G06K 936

Patent

active

056029420

ABSTRACT:
According to this invention, a sharpness emphasis is carried out by multiplying a sharpness emphasis signal of an original image by a function of a look-up table which is accessed based on an output from an edge detecting filter performing detections in accordance with only the edge portions of the original image. Since the edge detecting filter for detecting edges of the image is equipped in order to emphasize the sharpness only in the edge portions of the image, it is possible to prevent the image grains from being sharpness-emphasized. In addition, although the edge detecting filter may have a same size of a mask with that of the unsharpness mask, it is possible, if required, to modify freely both sizes of the masks, in order to perform a proper process in accordance with each image variation.

REFERENCES:
patent: 3832577 (1974-08-01), Harr
patent: 4319268 (1982-03-01), Yamada
patent: 4335407 (1982-06-01), Atoji et al.
patent: 4553260 (1985-11-01), Belt et al.
patent: 4591923 (1986-05-01), Urabe et al.
patent: 4670793 (1987-06-01), Yamada et al.
patent: 4672463 (1987-06-01), Tomohisa et al.
patent: 4739395 (1988-04-01), Johanndeiter et al.
patent: 4747052 (1988-05-01), Hishinuma et al.
patent: 4758891 (1988-07-01), Hitchcock et al.
patent: 4783833 (1988-11-01), Kawabata et al.
patent: 4785347 (1988-11-01), Ezuka et al.
patent: 4817174 (1989-03-01), Nakatani
patent: 4860118 (1989-08-01), Arimoto
patent: 4972256 (1990-11-01), Hirosawa et al.
patent: 5051842 (1991-09-01), Shimazaki
patent: 5051902 (1991-09-01), Hishinuma
patent: 5111285 (1992-05-01), Fujita et al.
patent: 5134667 (1992-07-01), Suzuki

Affiliated with

Also associated with

Rating

Method and apparatus for emphasizing sharpness of image by detec does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for emphasizing sharpness of image by detec, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for emphasizing sharpness of image by detec will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-349146