摘要
分析了基于编码识别的电子白板系统坐标转换中偏差产生的原因,针对平移、缩放、旋转三类主要因素,讨论了系统校准及坐标转化的方法。借鉴触摸屏的校准思想,针对上述三种情况讨论了两点及三点校准算法在系统中的实现步骤,给出了求解方法。根据试验结果定量讨论了系统误差,并对误差产生的原因进行了分析。利用该方法完成校准及坐标转换能够满足实际应用的需要。
The error cause of coordinates conversation in electronic whiteboard based on encode recognition is analyzed. The system calibration and coordinates conversation method towards shift, scaled and rotation are discussed. Draw lessons from touch screens
calibration means, the implementation steps and solving method of two points and three points in terms of calibration algorithm are presented. According to the experiment results, Quantitative analysis of system error is discussed and the error causes are analyzed. Calibration and coordinates conversion based on the methods can meet the actual practical requirement.
出处
《大连民族学院学报》
CAS
2008年第3期266-269,共4页
Journal of Dalian Nationalities University
关键词
校准
坐标转换
电子白板
calibration
coordinates conversation
electronic whiteboard
