“…As to color vision, physicists generally support the trichromatic theory (Young-Helmholtz theory) [28] while psychologists often agree with opponent-process theory [29]. Thus, based on the particle filter with compensated motion model [23], particle weights are optimized using both RGB and [I, R-G, Y-B] color histograms on the mixed images in [22]. To improve tracking accuracy, the [I, R-G, Y-B] color histogram is computed for the intersection of the region indicated by the dynamic layer, extracted by layer separation [7], and the rectangular region centered at one particle.…”