File Exchange

image thumbnail

bandbank -- isotropic image spectral decomposition and filtering

version (3.61 KB) by Tristan Ursell
Decompose images into spatially isotropic spectral component images.


Updated 24 Jan 2017

View License

Tristan Ursell
Bandpass filter bank
Jan 2017

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).

Comments and Ratings (0)

MATLAB Release Compatibility
Created with R2013b
Compatible with any release
Platform Compatibility
Windows macOS Linux