The indirect binary modeis a new concept proposed by the author. It is applicable to on-line measur-ement of heating workpiece size in furnace,glass bandwidth in flcating tin trough and boundary positions.

• 间接二值化法是本文作者提出的新概念,它适用于炉内加热工件尺寸和浮法锡槽内玻璃带宽度及边界位置的在线测量。