本文利用小波变换的“多分辨”特性,在小波变换的模极大值点对应于信号的突变点,而边界就是信号的突变部分的理论基础上,依据模糊数学理论,用二进制小波变换模极大值改进阈值算法对模极大值进一步取舍,对得到的模极大值点进行遥感影像边缘提取,采用分段三次样条插值算法进行小波系数重构,最终可以得到单像素级的边缘,同时结果证明了该算法的可行性。 In this paper, the “multi-resolution” feature of wavelet transform is used. Based on the theory that the maximum point of the wavelet transform corresponds to the abrupt point of the signal and the boundary is the abrupt part of the signal, according to the theory of fuzzy mathematics, The modulo-maximal improved thresholding algorithm further modifies the modulo-maxima. The edge of the modulo-maxima is extracted from the remote sensing image, and the wavelet coefficients are reconstructed by using the piecewise cubic spline interpolation algorithm. Finally, single-pixel level The results show that the algorithm is feasible.