图像的二维反卷积，其中包括butterworth的低通滤波等多项功能-This used the same scr ipt as for butterworth2.m example。 Low Pass Filter to create a blurred image. Simply do deconvoution of butterworth low ass(divide rather multiply)

to invert the result

Note in practice the ideal forward blurring function will not be known

SO results will not be so perfect.