基于莫尔条纹的三维物体的旋转不变识别

本文提出一种基于莫尔条纹的三维物体旋转不变识别方法。采用阴影莫尔法的装置和频域滤波的方法,可得到物体的莫尔条纹图。因为物体的莫尔条纹是物体的等高线,体现三维物体特征的高度函数以莫尔等高线的形式编码于强度图中,因此基于莫尔条纹的相关识别具有本征三维识别的特点。采用振幅调制和功率谱相减的联合变换相关,用实现旋转不变识别的综合鉴别函数(SDF)作为联合变换相关输入的参考图像,来获得具有识别目标的旋转不变性和高的相关识别率。计算机模拟试验结果证明了这种方法用于三维物体旋转不变性识别的有效性。

Three-dimensional object recognition with rotation-invariant based on Moire fringe

In this paper a method of the three-dimensional object recognition with rotation-invariant based on moire fringe is proposed.In the shadow-moire system,moire fringe of object corresponding to the subtractive pattern is obtained after a filtering in the frequency domain.Because moire fringe is the object's contour lines,the height distributing information of the object is encoded in the moire fringe.So the three-dimensional object recognition based on moire fringe has the characteristic of intrinsic 3-D recognition.The rotation invariance and good recognition efficiency is achieved by using SDF(Synthetic Discrimination Functions) as the reference in the amplitude-modulated and a power spectrum subtracted joint transform correlator.The method is tested to have the efficiency of testing 3-D object with rotation-invariance through computer simulation.