Patent ID: 8564830

Claim:
A method for generating a sensitivity matrix, the method comprising: identifying a first color space CS 1 of a first color device and a second color space CS 2 of a second color device, said first and second color spaces being different; identifying a total of N intermediate components, IC i , where i=1 to N; calculating a first component sensitivity matrix as a gradient of said first color space CS 1 computed with respect to a first intermediate component IC 1 ; for each intermediate component i=2 to N, calculating an i th component sensitivity matrix as a gradient of intermediate component IC i-1 computed with respect to intermediate component IC i ; calculating a last component sensitivity matrix as a gradient of intermediate component IC N computed with respect to said second color space CS 2 ; generating a sensitivity matrix β using a chain rule of differentiation over each component sensitivity matrix such that: β=∇ IC i=1 CS 1 ×∇ IC i=2 IC i=1 ×∇ IC i=3 IC i=2 × . . . ×∇ IC i=N IC i=N-1 ×∇ CS 2 IC i=N ; and using said sensitivity matrix to calibrate a dynamically varying color marking device capable of device-independent color correction.