I tried to do convolution in R directly and using FFTs then taking inverse. But it seems from simple observation it is not correct. Look at this example:
I have a rather interesting problem to solve. I want to take a very simple sound (one note played on the piano) and try to process it in such a way that I can print out which note is most likely bein
I have a source code that could recognize a character\'s position in an image. but there is a line of code that i can\'t figure it out WHY?
In their book \"Digital Signal Processing\" Proakis & Manolakis describe a Method for computing the FFT of a real Signal of length 2N using a FFT of length N. This is basically done by splitting t
I\'m doing an assignment for a CSE class in Java and am implementing a FFT and the direct DFT (with matrix calculations). My FFT works fine, but my direct DFT is not working. My Fourier matrix is not
first I am not sure here is the right place to ask this question yet I have a question about image processing.
I am trying to implement the overlap and add method in oder to apply a filter in a real time context. However, it seems that there is s开发者_如何学编程omething I am doing wrong, as the resulting outp
Can someone please share a开发者_如何转开发 link or source where I can find the derivation of FFT(base-2) from the DFT. I need to put this in latex for my thesis and am finding so many different expla
Are there any good (if possible scientific) resources available (web or books) about overlap processing. I am not that interested in the effects of using overlap processing and windows when analyzing
I\'m trying to learn how to use Fast Fourier Transform, and have copied the FFT algorithm from Numerical Recipies in C called four1. I have written a small function test that fourier transforms a simp
加载中,请稍侯......