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用 Butterworth 滤波器对图像进行滤波

用 Butterworth 滤波器对图像进行滤波

    
Wolfram Language code: img = [image];
使用低通 Butterworth 滤波器：
Wolfram Language code: RecurrenceFilter[ToDiscreteTimeModel[ButterworthFilterModel[5], 1], img]
使用高通 Butterworth 滤波器：
Wolfram Language code: h = ButterworthFilterModel[{"Highpass", {0.5, 1}, {20, 1}}];
Wolfram Language code: RecurrenceFilter[ToDiscreteTimeModel[h, 1], img]