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公开(公告)号：US5430473A
公开(公告)日：1995-07-04
申请号：US323429
申请日：1994-10-14
CPC分类号： H04N7/142
摘要： A two-way video telephone station includes a television screen for displaying an image transmitted by a distant party to a telephone conversation, a video camera for electronically photographing a human subject and periodically transmitting his picture to the distant party, and position-indicating apparatus for keeping the subject within the camera's field of view. The position-indicating apparatus includes a pair of light-emitting diodes (LEDs)--one on each side of the camera. The LEDs are visible to the subject when he is out, or almost out, of the camera's field of view. Because the LEDs can only be seen when the subject needs to take corrective action, they act as passive restraints that are completely unnoticed when the subject is properly positioned. Red LEDs are used to indicate that movement should stop if the subject wishes to be centered in the picture transmitted to the distant party. In an alternate embodiment of the invention, a third LED is added which is green in color and is only visible to the subject when he is within the camera's field of view. Advantageously, the subject sees yellow light when he is at the edge of the camera's field of view.
摘要翻译： 双向视频电话站包括：电视屏幕，用于显示由远程方发送的图像到电话通话;摄像机，用于电子拍摄人类对象并周期性地向远方发送他的照片;以及位置指示装置， 将主题保持在相机的视野内。 位置指示装置包括在照相机的每一侧上的一对发光二极管（LED）。 当被摄物体出现或几乎熄灭时，LED对照相机的视场可见。 因为只有当受试者需要采取纠正措施时才能看到LED，所以它们作为被动对象，当被摄体被正确定位时，它们完全不被注意。 红色LED用于指示如果主体希望以发送到远方的图像为中心，则应停止运动。 在本发明的另一个实施例中，添加了第三个LED，它是绿色的，当他在相机的视野范围内时，对被摄体才是可见的。 有利的是，当他处于相机视场的边缘时，被摄体看到黄光。
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