摘要：This paper presents a novel algorithm for identifying quadric surfaces from scanned mechanical models. We make several important improvements over the existing variational 3D shape segmentation framework, which utilizes Lloyd＇s iteration. First, instead of using randomized initialization （which likely falls into non-optimal minimum）, the RANSAC-based initialization approach is adopted. Given a good initialization, our method converges quickly than previous approaches. Second, in order to enhance the stability and the robustness, we carefully modify the distortion-minimizing flooding algorithm by using seed regions instead of seed triangles. Third, the geometric constraints are introduced into the optimization framework. The segmentation quality is further improved. We validate the efficiency and the robustness of our proposed method on various datasets, and demonstrate that our method outperforms state-of-art approaches.

摘要：介绍了一种人体脉搏信号的采集系统,通过专用的脉搏传感器采集信号,将得到的信号经过预处理后送到FPGA,暂存到RAM中,同时用FPGA驱动VGA接口实时显示脉搏波形。利用FPGA的片内资源RAM实现了脉搏波形图像的动态显示,实时性好、画面清晰,为后续的生理病理信息提取提供了有效支持。