Facsimile and static presentation processing – Natural color facsimile – Interpolation
Patent
1996-07-25
1998-04-07
Coles, Sr., Edward L.
Facsimile and static presentation processing
Natural color facsimile
Interpolation
382300, 358525, 358428, H04N 146, H04N 141
Patent
active
057371016
ABSTRACT:
An interpolating operation is carried out on original image signal components which make up an original image signal representing an original image and represent values of original picture elements arranged in a grid pattern at predetermined intervals to obtain interpolation image signal components representing values of interpolation picture elements arranged in a grid pattern at intervals different from those of the original picture elements. Each interpolation image signal component is operated by multiplying the image signal components for a plurality of original picture elements adjacent to the interpolation picture element by respective interpolation coefficients calculated from the image signal components for the adjacent original picture elements. The density vector at the interpolation picture element on the original image represented is calculated, distances of the respective adjacent original picture elements from a segment perpendicular to the density vector are calculated, the interpolation coefficient is corrected to be smaller as the density vector and/or the distance of the original picture element from the segment becomes larger, and the interpolating operation is carried out on the basis of the corrected interpolation coefficient.
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"Signal Processing IV: Theories and Applications--Edge Preserved Image Zooming"; Wang et al., Proceedings of EUSIPCO-88, Fourth European Signal Processing Conference Grenoble, France, pp. 1445-1448.
Coles Sr. Edward L.
Fuji Photo Film., Ltd.
Lamb Twyler M.
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