Two dimensional color calibration for four primary displays
The process to ensure a fixed and desired response from a color display generally consists of a per-channel calibration transform combined with a multi-dimensional characterization transformation. In this paper We focus on the former, i.e., the channel calibration. Conventional one-dimensional channel calibration strategies are inadequate for high resolution LCD displays because of inter-channel crosstalk. We address this problem by developing a color calibration strategy for a four primary LCD display, based on a two dimensional structure for channel calibration, which allows for simultaneously meeting the dual objectives of perceptual linearization of individual channels and gray balance along the device gray axes, despite inter-channel crosstalk. The two-dimensional nature of the transform represents a good balance between the dual objectives of low complexity and accurate control of key attributes of the displayed colors via channel calibration and experimental results demonstrate that the proposed scheme accomplishes its objectives offering a significant improvement over the per channel calibration for our four primary display system.