三维破碎物体多尺度拼接技术

在分析三维物体碎片轮廓曲线的特征和表示的基础上,研究多尺度小波轮廓描述符的计算,提出了一种多尺度下轮廓曲线特征提取及基于多尺度分析的三维物体碎片拼接方法.轮廓曲线经多尺度小波变换平滑后,提取曲率和挠率构成特征矢量;在选择了基于小波轮廓描述符的三维曲线匹配起点后,比较2条轮廓曲线的特征矢量以判断轮廓的相似性,并将轮廓匹配的2块相邻物体碎片拼接,实现破碎物体复原.最后通过实验验证了该方法的有效性.

A Multiscale Method for Mosaicing 3D Fragmented Objects

Automatic mosaicing fragments from the broken objects is an unsolved problem. A mosaicing method based on wavelet multiscale analysis for 3D fragmented objects is presented. Starting point problem for curves matching is introduced. Spatial contour curves are first transformed by wavelet at an appropriate scale. The curvatures and torsions of smoothed contour by wavelet transform at a scale are calculated to form the feature vector of the contour curves. Similarity between two contour curves is determined by comparing feature vectors of two contour curves. Fragments of broken objects with their contour curves matching are then assembled. Experimental results show that this method is robust, fault tolerant, effective and accurate in curves matching and fragmented objects mosaicing.