作　　者： ;

机构地区： 华南理工大学

出　　处： 《机械传动》 2015年第6期49-53,共5页

摘　　要： 分析总结了现有的提取平面连杆曲线特征参数方法的优缺点。基于傅里叶描述子的高频分量能够很好地解释细节,而低频分量则决定物体边界整体形状的性质,提出了采用傅里叶描述子提取平面连杆曲线特征参数的方法,同时建立了平面连杆曲线特征参数数值图谱库。计算结果表明,傅里叶描述子的低频项经过傅里叶逆变换能够很好地复现原封闭曲线,并且经过归一化后的傅里叶描述子具有很好的鲁棒性,相应的数值图谱具有精度高、计算简单、冗余度小的优点。 The advantages and disadvantages of existing extraction method about planar linkage curve characteristic parameter are analyzed and summarized. On the basis of the property that high - frequency com- ponent of the Fourier descriptor can well explain the details, and low - frequency component determines the o- verall shape of the object boundary, the method by using Fourier descriptor to extract characteristic parameters of the planar linkage curve is proposed, and the numerical atlas database of planar linkage curve characteristic parameter is established. The calculation results show that the low -frequency component of Fourier descriptor can well reproduce the original closed curve through the inverse Fourier transform, and the normalized Fourier descriptor has good robustness, the corresponding numerical atlas database has the advantages of high precision, simple calculation, small redundancy. All of these bring a new thinking way for four - bar linkage curve replay.

关 键 词： 平面连杆机构 傅里叶描述子 连杆曲线 数值图谱库 MATLAB

分 类 号： [TP391]

领　　域： []