【摘要】 根据计算机图形学原理,利用坐标变换,包括放缩、规格化等一系列处理,将激光扫描的原木三维几何数据转换成世界坐标,再利用比例、投影、旋转等方法对转换后的坐标进行处理,进而形成相应的计算机屏幕坐标,最终在计算机上真实再现原木的几何特征,为原木加工的自动化处理提供依据。更多还原

【Abstract】 It is important to be able to accurately and rapidly measure log diameter to efficiently and automatically process logs. This paper describes a computer graphic method to represent a three dimensional shape of a log. Basic cross-sectional data were obtained by passing logs, at a given speed, through a frame on which laser scanners had been installed. Images of the shape of the logs were then viewed on the computer screen where they could be manipulated such as changing the coordinates, zooming in or out, or rotating them.更多还原