利用曲率特征虚拟拼接青铜器小碎片的方法

针对青铜器小碎片人工拼接复原耗时费力的问题，提出了一种基于曲率特征的青铜器小碎片虚拟拼接方法．首先分别提取青铜器小碎片的轮廓，并在平滑处理提取结果的基础上计算轮廓的曲率．其次以曲率的局部极大值点作候选角点，再根据支撑域消除圆角点和伪角点．然后计算相邻两角点间的弦长，以弦长作为特征序列进行匹配．最后在平移旋转过程中利用向量模的不变性进行匹配精化处理，得到青铜器小碎片的最终拼接结果．实验结果表明，该方法能够有效地提高拼接效率和匹配效果．

Approach to reassembling virtual small bronze fragments using the curvature feature

For the time-consuming problem of manual stitching small bronze fragments,an approach for virtual small bronze fragments reassembly based on curvature feature is proposed. First, we extract and smooth the 2d contour of the small bronze fragment, and then compute the curvature of each point on the contour and regard the local maxima of the curvature as the candidate corners. After that, the round corners and false corners are eliminated according to the support region. And then the chord lengths between the adjacent corners are calculated as the feature sequences to find the match. Finally, the reassembled result is obtained and refined by applying the invariance of the vector module. Experimental result proves that the method can effectively improve the efficiency of stitching and the effect of matching.