Image analysis – Image enhancement or restoration – Image filter
Patent
1996-09-27
1998-05-05
Rogers, Scott
Image analysis
Image enhancement or restoration
Image filter
382264, 382266, 382275, G06T 500, G06K 940, G06K 944
Patent
active
057487995
ABSTRACT:
A filtering process is carried out on an original image, which is constituted of a lattice-like array of picture elements, that are located at predetermined intervals along the rows and columns of the lattice-like array, by using a mask having a predetermined size and with respect to each of the picture elements of the original image. The mean value of the values of picture elements falling within the mask is calculated with the filtering process, and a smoothed image represented by the thus calculated mean values is thereby obtained. The filtering process is carried out repeatedly on the smoothed image. Processing for emphasizing high frequency components of the original image is then carried out in accordance with the smoothed image, which has thereby been obtained. A processed image, in which an artifact is not perceptible, is thereby obtained.
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patent: 4903205 (1990-02-01), Hishinuma
patent: 5291403 (1994-03-01), Ito
Fuji Photo Film Co. , Ltd.
Rogers Scott
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