Method for transforming color signals

Details Method for transforming color signals Method for transforming color signals

1995-04-17

1997-01-07

Vu, Kim

Facsimile and static presentation processing

Natural color facsimile

Interpolation

358500, 358530, 358535, H04N 146

Patent

active

055923127

ABSTRACT:
In a method for transforming a color signal, a target output color signal component (X, Y, Z) is transformed into an input signal component (B, G, R) by referring to a look-up table, and a target output color signal component, which is not stored in the look-up table, is transformed into an input signal component by an interpolating process. In an output color signal space, a local coordinate system is set by using a successive approximation process, and a desired output color signal component is subjected to linear interpolation in the local coordinate system. A three-dimensional interpolating process is thus carried out quickly and accurately and over the entire color reproduction range.

REFERENCES:
patent: 5428465 (1995-06-01), Kanamori et al.
patent: 5475510 (1995-12-01), Ikegami
patent: 5479272 (1995-12-01), Saito

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