| 摘要 |
The present invention realizes high-speed data interpolation in the control of a predetermined plant, such as an image processing apparatus that carries out color correction. A table is provided to store data at respective lattice points (B, C, M, W, K, G, Y, R) that are discretely set in a coordinate space of a predetermined number of dimensions (R, G, B). The process first identifies a specific lattice division which is defined by some lattice points (B, C, M, W, K, G, Y, R) and in which input coordinates P(Rd, Gd, Bd) are included, and computes a base point of the specific lattice division (K) and offset coordinates (Roff, Goff, Boff) corresponding to a deviation from the base point (K). The process then refers to an offset correction table, which stores weighting coefficients and lattice point specification data used for interpolation, and reads the weighting coefficients and the lattice point specification data corresponding to the computed offset coordinates (Roff, Goff, Boff). The process subsequently multiplies the data corresponding to the lattice points specified by the lattice point specification data by the weighting coefficients and thereby interpolates the table. In the image processing apparatus, this table to be interpolated stores color correction data in a color spacer (R, G, B). <IMAGE> |
