Patent ID: 7847976

Claim:
A method for controlling an image output device operatively connected to a spectral measurement device and one or more controllers, the controller performing the method comprising the steps of: (a) generating an initial image output device LUT (look-up-table) characterizing an image output device for a plurality of states associated with the image output device, wherein each state of the image output device LUT associates a first set of target colors with a plurality of respective spectral measurements; (b) generating a first data matrix representing all spectral measurements associated with each respective target color for all image output device states; (c) calculating the nominal spectral response associated with each target color; (d) generating a second data matrix representing the target color spectral variation by subtracting the nominal spectral response from each target color spectral response for each state; (e) performing a first PCA (Principle Component Analysis) on the second data matrix to represent the image output device LUT with a third data matrix including the first set of target colors associated with a predetermined number of spectral directions; (f) performing a second PCA on each spectral direction associated with the third data matrix to represent the image output device LUT with a fourth data matrix including each principle spectral direction associated with the variation of the first set of target colors; (g) measuring the spectral properties associated with a second set of target colors, the second set of target colors including a subset first set of target colors; and (h) estimating an image output device LUT for the first set of target colors utilizing the third and fourth data matrixes, and the measured spectral properties associated with the second set of target colors.