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# deconvwnr() - Image Processing

### Syntax

### Example

### Output / Return Value

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### Reference

J = deconvwnr(I,PSF,NSR) deconvolves image I using the Wiener filter algorithm, returning deblurred image J. Image I can be an N-dimensional array. PSF is the point-spread function with which I was convolved. NSR is the noise-to-signal power ratio of the additive noise. NSR can be a scalar or a spectral-domain array of the same size as I. Specifying 0 for the NSR is equivalent to creating an ideal inverse filter.The algorithm is optimal in a sense of least mean square error between the estimated and the true images.J = deconvwnr(I,PSF,NCORR,ICORR) deconvolves image I, where NCORR is the autocorrelation function of the noise and ICORR is the autocorrelation function of the original image. NCORR and ICORR can be of any size or dimension, not exceeding the original image. If NCORR or ICORR are N-dimensional arrays, the values correspond to the autocorrelation within each dimension. If NCORR or ICORR are vectors, and PSF is also a vector, the values represent the autocorrelation function in the first dimension. If PSF is an array, the 1-D autocorrelation function is extrapolated by symmetry to all non-singleton dimensions of PSF. If NCORR or ICORR is a scalar, this value represents the power of the noise of the image.Note The output image J could exhibit ringing introduced by the discrete Fourier transform used in the algorithm. To reduce the ringing, use I = edgetaper(I,PSF) prior to calling deconvwnr.

J = deconvwnr(I,PSF,NSR)J = deconvwnr(I,PSF,NCORR,ICORR)

I = edgetaper(I,PSF)