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DISTORTION-INVARIANT PATTERN RECOGNITION WITH FOURIER-PLANE NONLINEAR FILTERS

机译:傅里叶平面非线性滤波器的畸变模式识别

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The use of nonlinear techniques in the Fourier plane of pattern-recognition correlators can improve the correlators' performance in terms of discrimination against objects similar to the target object, correlation-peak sharpness, and correlation noise robustness. Additionally, filter designs have been proposed that provide the linear correlator with invariance properties with respect to input-signal distortions and rotations. We propose simple modifications to presently known distortion-invariant correlator filters that enable these filter designs to be used in a nonlinear correlator architecture. These Fourier-plane nonlinear filters can be implemented electronically, or they may be implemented optically with a nonlinear joint transform correlator. Extensive simulation results are presented that illustrate the performance enhancements that are gained by the unification of nonlinear techniques with these filter designs. (C) 1996 Optical Society of America. [References: 27]
机译:在模式识别相关器的傅里叶平面中使用非线性技术可以改善相关器的性能,例如,对与目标对象相似的对象进行区分,相关峰清晰度和相关噪声鲁棒性。另外,已经提出了滤波器设计,该滤波器设计为线性相关器提供了关于输入信号失真和旋转的不变性。我们提出对当前已知的失真不变相关器滤波器的简单修改,以使这些滤波器设计能够在非线性相关器架构中使用。这些傅里叶平面非线性滤波器可以通过电子方式实现,也可以通过非线性联合变换相关器以光学方式实现。给出了广泛的仿真结果,这些结果说明了通过将非线性技术与这些滤波器设计统一起来所获得的性能增强。 (C)1996年美国眼镜学会。 [参考:27]

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