ZEMAX是美国Focus Software Inc.所发展出的光学设计软件，可做光学组件设计与照明系统的照度分析，也可建立反射，折射，绕射等光学模型，并结合优化，公差等分析功能，是套可以运算Seqential及Non-Seqential的软件。 -ZEMAX U.S. Focus Software Inc. The development of optical design software, optical components can do the illumination design

This paper introduces a new object tracking method which combines two algorithms working in parallel, and based on low-level observations (colour and gradient orientation): the Generalised Hough Transform, using a pixel-based descr iption, and