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Jun 21, 2022
In General Discussions
Recall that when you are sitting on a moving train, do you feel that objects that are close to you (such as a fence) will move very fast, while objects that are far away from you (such as a building in the distance) will move relatively slowly a lot of. So, what caused executive email list this phenomenon? First of all, we need to make it clear that the human eye does not use the earth as a reference to judge the speed of an object, but our human eye itself as a reference . As shown executive email list in Figure 2, the position of the human eye is set as O, and the actual speed of the object from point. A to point B is the distance/time of AB, but in fact, the speed perceived by the human eye is the angle/time of the included angle AOB. With this clear, the basic geometry problem follows: A New Dimension of Information Hierarchy: Parallax Motion Figure II The executive email list first case, translational motion, is like you are sitting on a moving train, and the objects outside the window are actually translations in your field of vision. The principle of this parallax motion is shown executive email list in Figure 3. The two objects AB move a distance in the same time, but the distance between the AB object and the eye is different. It can be clearly seen from the figure that the included angle β is smaller than the included angle α. That is to say, if the human eye is used as a reference, the angular velocities of the two objects AB are different, which makes us feel that distant objects move slower. And this is parallax motion. Figure 3 The second case, rotational movement, is like when you usually executive email list shake your head to look at something. This again has three different sub-cases: the center of rotation is the human eye itself, the center is in front of the human eye, and the center is behind executive email list the human eye. Let's talk about the most special case first, where the center of rotation is in front of people's eyes.
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