Interpolation methods and apparatus

Details Interpolation methods and apparatus Interpolation methods and apparatus

1980-07-02

1982-06-08

Masinick, Michael A.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 80, G03F 308

Patent

active

043342400

ABSTRACT:
The invention relates to methods and apparatus for interpolating between coarse stored data to achieve a more accurate answer, and is particularly applicable to color scanning reprographic equipment. Color scanners (5) analyze an original to obtain digital signals (8) representing three primary color intensities. The values for the intensities of each of four printing colors, including black, are functions of all three primary color intensities, and a limited quantity of these sets of four values is stored in a three dimensional matrix (25), consisting of cubes with values at their corners. To obtain values from these coarse stored data corresponding to a point (P) within a cube, an interpolator (26) determines which one, of the three pyramids (e.g. W B G C V in FIG. 2) comprising the cube, contains the point, and interpolates within that pyramid between the values at its five vertices.

REFERENCES:
Gallagher, "Representation of Element Behavior Functions and Geometry", From Finite Element Analysis Fundamentals, Prentis-Hall, 1975, pp. 211-247.

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