We can perceive information such as colors, shapes, motion, or the depth through our eyes. We feel that we can perceive these stimuli at the moment we watch them, but in fact it took some time to transmit an information from eye to brain, and to process it. In this study we are going to explore what kind of factor influences the image-processing function of our brain. Our experimental results about the dependency of the bloodstream in our brains on the factors such as color (hue, saturation, luminosity), space, and time are reported.