Method and apparatus for automatically adjusting sharpening...

Details Method and apparatus for automatically adjusting sharpening... Method and apparatus for automatically adjusting sharpening...

2006-04-18

2006-04-18

Patel, Kanjibhai (Department: 2625)

Image analysis

Image enhancement or restoration

Focus measuring or adjusting

C382S275000

Reexamination Certificate

active

07031545

ABSTRACT:
A method of automatically adjusting sharpening weighting value in an image sharpening process is disclosed. The method utilizes scanning a correction board having a black reference region, a white reference region and a plurality of line pair regions to aid the calculations of the modulation transfer function value and noise value. The method automatically adjusts weighting values of a sharpening function and avoids accompanying noise increase simultaneously in an image sharpening process performed in an image processing apparatus and thereby high quality images with high signal
oise ratio can be provided.

REFERENCES:
patent: 3743427 (1973-07-01), Weiser
patent: 4817181 (1989-03-01), Kamiya
patent: 5995248 (1999-11-01), Katori et al.
patent: 6452631 (2002-09-01), Hsu et al.

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