Angular and radial differential method based on Fourier-polar coordinate transformation

The invention relates to the field of angular and radial differential, in particular to an angular and radial differential method based on Fourier-polar coordinate transformation, and the method comprises the steps: S1, inputting an optical signal; s2, converting the angular dimension and the radial dimension of the optical signal into x-axis distribution and y-axis distribution through polar coordinate transformation; s3, performing x-axis differential and y-axis differential processing on the optical signal after coordinate transformation so as to realize actual angular and radial differential; and S4, polar coordinate distribution is returned through polar coordinate inverse transformation. According to the method, the complex process of conventional angular and radial differential is simplified, and meanwhile, due to introduction of Fourier-polar coordinate transformation, the angular and radial differential scheme can be universally applied. 本发明涉及角向和径向微分领域，具体涉及一种基于傅里叶-极坐标变换的角向和径向微分方法，包括：S1、输入光信号；S2、通过极坐标