Lightweight algorithm for preventing texture distortion in oblique photogrammetry model simplification
To address the texture distortion after mesh simplification in oblique photogrammetry models,we propose a lightweight algorithm based on the quadratic error metric(QEM)algorithm.It categorizes vertices based on their topological connectivity within the model,and then formulates appropriate folding strategies for different vertex types.It also introduces vertex fluctuation factor,texture deformation factor,and average triangle area within a one-ring neighborhood of each vertex to enhance the edge folding cost in the QEM algorithm.Our experimental results show the improved algorithm effectively avoids texture distortion at high simplification rates,preserving both the geometric and texture features of the model.Meanwhile,it reduces the maximum error,average error,and mean square error of the processed model by at least 43.55％,52.50％and 21.61％respectively compared to those of the QEM algorithm.At a simplification rate of 90％,the algorithm lowers the maximum error,average error,and mean square error of the processed model by 34.90％,10.61％and 12.31％respectively compared to those of simplification algorithm for textured models.
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