ITRI then decided to use another technique, in which a white stripe was laid on the floor at the entrance to the exhibition. The stripe would be monitored by a computer, reporting a new visitor each time the line was crossed.
若要增加它判斷白髮和禿頭的能力，電腦就要增長處理的時間，恐怕難以「應付」資訊月眾多的參觀者，所以機械所想出了另一套辦法，就是在地上畫條白線，以和電腦相連的攝影機「監看」，只要有人通過，遮斷了白線，電腦就知道「有人來了」！