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An example of a point light display of an American Sign Language sentence. The biological motions of the signer can be observed through the motions of white dots, as they sign a sentence. Biological motion is motion that comes from actions of a biological organism.
Points of Light presentation in the East Room of the White House in January 1993. Points of Light is an international nonprofit, nonpartisan organization headquartered in Georgia, United States dedicated to engaging more people and resources in solving serious social problems through voluntary service.
The first known instance of the phrase "a thousand points of light" appears in Arthur C. Clarke's short story "Rescue Party," initially published in Astounding Science-Fiction, May 1946: One entire wall of the control room was taken up by the screen, a great black rectangle that gave an impression of almost infinite depth.
When light shines on the circular obstacle, Huygens' principle says that every point in the plane of the obstacle acts as a new point source of light. The light coming from points on the circumference of the obstacle and going to the center of the shadow travels exactly the same distance, so all the light passing close by the object arrives at ...
A point source of fluid is the inverse of a fluid point sink (a point where fluid is removed). Whereas fluid sinks exhibit complex rapidly changing behavior such as is seen in vortices (for example water running into a plug-hole or tornadoes generated at points where air is rising), fluid sources generally produce simple flow patterns, with ...
The point spread function (PSF) describes the response of a focused optical imaging system to a point source or point object. A more general term for the PSF is the system's impulse response ; the PSF is the impulse response or impulse response function (IRF) of a focused optical imaging system.
How linear or point-projection prospective works: Rays of light travel from the object (cube), through the picture plane, and to the viewer's eye (O). Vanishing points emitting straightly lines coincident with the edges the cube drawn on the picture plane are located at the left and right of the plane.
The analysis found that dominant local optic flow features are very similar in both full body 2d stimuli and point light walkers (Figure 1). [22] Since subjects can recognize biological motion upon viewing a point light walker, then the similarities between these two stimuli may highlight critical features needed for biological motion recognition.
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