【摘要】 针对经典约束纹理映射算法在保持纹理有效性的同时算法复杂度高的问题,提出了根据评估值自适应选取目标函数的约束纹理映射方法。结合模型的参数化平面,计算模型特征点三角化后每一个三角块内部所有顶点的评估值,根据与给定阈值比较后的结果自适应选择目标函数。对于不能直接应用两种目标函数的三角块进行迭代三角化并计算下一级三角块的评估值。针对局部特征点映射不精确的问题采取局部邻域调整方法,只需调整一阶或者二阶领域的顶点位置即可。实验表明本文算法相较于经典算法时间复杂度平均提高75%以上。将本文算法映射后的模型加载到高帧频实时渲染系统中,实验表明本文算法具有很好的鲁棒性,重复实验表明本文算法可以保持纹理的有效性。更多还原

【Abstract】 In order to improve the effectiveness of texture mapping,this paper proposed a constraint texture mapping method based on the evaluation value to determine which object function to select.This algorithm computes evaluation value of internal vertices of every triangular block after the feature points triangulation in the parameter plane.The objective functions are not suited for any triangles.For these trangles,a triangulation iteratively was conducted.Experiments show that this algorithm is dropped an average more than 75%of the time than the classical algorithm.The model of this algorithm is loaded into the real-time rendering system with high frame frequency.Experiments show that the algorithm has good robustness,and repeated experiments show that the proposed algorithm can maintain good texture validity.更多还原