dft

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Discrete Fourier transform

I am currently trying to write some fourier transform algorithm. I started with a simple DFT algorithm as described in the mathematical definition:[详细]

2023-04-08 19:26 分类：问答
Inverse filtering on OpenCV - accessing DFT values and multiplying DFT matrices

I am trying to perform an inverse and a pseudo-inverse filtering in the frequency domain. However I am having trouble accessing DFT coefficients and multiplying DFT matrices afterwards, since I got c[详细]

2023-04-08 05:50 分类：问答
CUDA convolutionFFT2D example - I can't understand it

I studied the Cooley Tukey algorithm and I understood it. I got everything in the CUDA convolutionFFT2D example till these kernels:[详细]

2023-03-06 02:52 分类：问答
Cooley Tukey twiddle factor in a simple python script

I\'m reading how the cooley tukey method works, but I have a few problems with the following python script:[详细]

2023-03-05 21:30 分类：问答
Calculating the DFT with Jtransform's DoubleFFT_1D() for android

I have been searching everywhere to find a reliable method to calculate the FFT of an audio byte stream received by a native function in android SDK (through eclips开发者_StackOverflow社区e IDE). I ha[详细]

2023-02-27 08:21 分类：问答
Can anyone help with this hasNextLine() error?

Having problems compiling this class. I\'m working through a book on java and this is one of the exercises, and they provide most of the code. So this is basically a stock class provided by the book.[详细]

2023-02-03 09:43 分类：问答
any rules of thumb how to smooth FFT spectrum to prevent artifacts when hand-tweaking?

I\'ve got a FFT magnitude spectrum and I开发者_开发知识库 want to create a filter from it that selectively passes periodic noise sources (e.g. sinewave spurs) and zero\'s out the frequency bins associ[详细]

2023-01-18 16:48 分类：问答
DSP - Filtering in the frequency domain via FFT

I\'ve been playing around a little with the Exocortex implementation of the FFT, but I\'m having some problems.[详细]

2023-01-01 04:06 分类：问答
date string formatting

Th开发者_高级运维e best way to take a string that is formated like... YYYY-MM-DD and make it appear like...[详细]

2022-12-18 19:58 分类：问答