本文叙述了一种付诸实际应用的光笔控制的数字式电视跟踪窗。
This paper describes a type of digital TV tracking window controled by Iight pen for practical applications.
但是很幸运我们可以，控制红色激光笔，虽然什么都没有移动。
But luckily we had the control of the red laser pointer where nothing moved at all.
但是很幸运我们可以，控制红色激光笔，虽然什么都没有移动。
But luckily we had the control of the red laser pointer where nothing moved at all.
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