Monthly Archives: December 2018
The colors of objects that we see are not a property of the objects themselves, but a property of our vision. Grass looks green only because light rays reflected from it with a wavelength in the range of 500-565 nm, falling on the light-sensitive receptors of the eye, cause the brain to feel green. Having got used to the fact that the grass is usually green, we see it green even in unusual lighting. Human vision is characterized by color impermanence. Our brain adjusts the color balance so that objects retain their natural colors for us as much as possible, regardless of the color of the lighting. White paper seems to us equally white, that in the daytime, when it is illuminated by cold light pouring from the window, that in the evening, when the warm light of incandescent lamps falls on it. Continue reading
Often, a scene that looks attractive to our eyes is completely unrepresentable in the photo – with a whitish, illuminated sky, with black holes in the place of shadows, with surreal color shades. What is the reason? Why can’t the camera just take and display the scene as it is? In fact, she’s trying. Because of its modest capabilities. The problem is that we ourselves never see the world as it really is. Our eyes and brain do a tremendous job so that we can enjoy the surrounding reality. The camera does not know how to do this, and you will have to think for it, perform non-obvious and not always natural manipulations to get images that look natural.
Central and peripheral vision
The field of view, sensitive to detail, is very small – about three degrees. Continue reading