filtering through correlation - MATLAB documentation
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MATLAB documentation says that "imfilter performs multidimensional filtering using correlation, which is the same way that FILTER2 performs filtering. When no correlation or convolution option is specified, imfilter uses correlation." I guess what is possible for M-D is also possible for 1-D signals. Filtering (linear convolution) can be implemented through circular convolutions through DFTs for efficiency of computation. And I am curious to know why filtering is done through correlation as stated in documentation. Any ideas or references?
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