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    Fast Fourier Transform

    Usage

    ImagePeriodogram[image] shows the squared magnitude of the discrete Fourier transform (power spectrum) of image. ImagePeriodogram[image, n] shows the average of power spectra of non-overlapping partitions of size n×n. ImagePeriodogram[image, n, d] uses partitions with offset d. ImagePeriodogram[image, n, d, wfun] applies a smoothing window wfun to each partition. ImagePeriodogram[image, n, d, wfun, m] pads partitions with zeros to length m prior to the computation of the transform.

    Basic example

    Power spectrum of a texture image: In[1]:=ImagePeriodogram[] Out[1]=

    Option

    Alignment

    Relationships with other entities

    PeriodogramArray | Periodogram | Fourier | SpectrogramArray | Spectrogram | DirichletWindow | Partition | ImagePartition

    Relationships with other entities

    History

    introduced in Version 9 (November 2012)

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