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Title: Bandpass Filter Kernel Post by: promach on August 09, 2016, 08:48:09 08:48 Hi, anyone done digital filter kernel design before ? I need a bandpass filter for image processing that ranges from 0 to pi/2.75 with a notch at DC.
for section 4.3 of https://infoscience.epfl.ch/record/135217/files/1708.pdf (https://infoscience.epfl.ch/record/135217/files/1708.pdf) , how does driving sigma1 to infinity will result in a notch in frequency at DC ? Besides, how will [1, 4, 6, 4, 1]/16 give upper cutoff frequency pi/2.75 ? I am currently reading on books related to DSP. Any advise ? |