bandbank -- isotropic image spectral decomposition and filtering

Versione 1.0.0.0 (3,61 KB) da Tristan Ursell
Decompose images into spatially isotropic spectral component images.
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Aggiornato 24 gen 2017

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Tristan Ursell
Bandpass filter bank
Jan 2017
Im2=bandbank(Im1,dF,NF)
Im2=bandbank(Im1,dF,NF,beta)
Im2=bandbank(Im1,[band_vec],beta)

Im1 = input image (single channel)
dF = stepsize in radial frequency space
NF = number of filters applied
NF=1 means no filter
NF=2 means low pass and high pass about dF
NF>2 bandpass filters in steps of dF

Im2 = spectrally decomposed output images from Im1

The optional parameter 'beta' sets the sharpness of the frequency cutoff
between the bands, higher numbers are sharper cutoffs -- smoother cutoffs
reduce ringing, but have mixed fequency regions with other bands. The
default value is beta=0.5.

The decomposed images have the property that 'sum(Im2,3)=Im1' (to a good approximation).

Cita come

Tristan Ursell (2025). bandbank -- isotropic image spectral decomposition and filtering (https://it.mathworks.com/matlabcentral/fileexchange/61255-bandbank-isotropic-image-spectral-decomposition-and-filtering), MATLAB Central File Exchange. Recuperato .

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Creato con R2013b
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Versione Pubblicato Note della release
1.0.0.0