Patent ID: 7367681

Claim:
A method for calculating input signals to at least two light projectors for spreading fluctuations in color intensity over an area, thereby creating a substantially invisible transition zone between them, said method comprising: calculating input signals to each of the at least two light projectors for a projected image in a predetermined transition zone based on a blending function that controls emitted light directed toward said predetermined transition zone from each of at least two light projectors; wherein the input signals to at least two light projectors are provided from tabulating said blending function using red light, green light, blue light and a blending factor to produce a tabulated blending function, wherein said blending function for each of at least two light projectors at each point within said transition zone provides a sum constituting a transfer function in the point, so as to obtain predictable projected image characteristics in the transition zone, and wherein said tabulated blending function is calculated from a downhill optimization algorithm, and wherein the projected image at each point in said transition zone is constituted by the contribution from each of the at least two light projectors, and wherein the amount of the contribution from each of the at least two light projectors is determined by choosing said blending factor for each point.