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I have an image and I have to take a fourier transform of the image along the rows ie..using ROW_DFT. After that i want to apply a bandpass filter which filters a desired frequency of that image. Then perform an inverse fourier transform to get the spatial image. How can i do it.Thanks in advance.

I have an image and I have to take a fourier transform of the image along the rows ie..using ROW_DFT. DFT_ROWS flag. After that i want to apply a bandpass filter which filters a desired frequency of that image. Then perform an inverse fourier transform to get the spatial image. How can i do it.Thanks in advance.