高通滤波器，对图像进行高通滤波。采用opencv，包含二维理想高通滤波，2阶巴特沃思高通滤波，二维高斯高通滤波，增长率为2二维指数高通滤波-High-pass filters, high pass filter the image. Using opencv, including two-dimensional ideal high-pass filter, 2-order Butterworth high pass filter, two-dimensional Gaussian high pass filter, two-dimensional exponential growth rate of 2 high-pass filter