基于特征自适应的激光扫描投影图形控制点提取及优化方法

Control Point Extraction and Optimization Method of Laser Scanning Projection Graphics Based on Feature Adaptation

提出一种基于特征自适应的激光扫描投影图形控制点提取及优化方法,该方法依据各相邻点的曲率和法向量夹角划分待投影图形的特征区域和非特征区域,实现针对不同图形特征的投影控制点自适应分布。同时,为了保证投影图形控制点在稀释处理后的形状准确度,提出基于人眼空间分辨率的控制点数量稀释和优化方法。最后,将优化得到的投影图形控制点作为扫描投影点完成待投影图形轮廓的循环扫描投影。实验结果表明:将所提方法应用到激光扫描投影系统中,可使投影图形控制点数减少20%以上,有效解决了扫描投影复杂图形时的"闪烁"问题。

A control point extraction and optimization method for laser scanning projection graphics based on feature adaptation was proposed.It achieved the adaptive distribution of projection control points for different graphics features by dividing the feature region and non-feature region of the to-be-projected graphics according to the curvature of each adjacent point and the normal vector angle.Meanwhile,to ensure the shape accuracy of the projected graphics after projection control points were diluted,we also studied the dilution and optimization of the number of control points based on the spatial resolution of human eyes.Finally,the optimized control points of the projected graphics were used as the scanning projection points to complete the cyclic scanning projection of the to-be-projected graphics contour.The experimental results show that the proposed method,when applied to a laser scanning projection system,can reduce the number of projection control points by more than 20% and solve the “flicker” problem in the scanning projection of complex graphics.