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Filter noise and interpolate microscopy images in frequency domain

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Filter noise and interpolate microscopy images in frequency domain

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07 Feb 2013 (Updated )

Remove spatial frequencies beyond the optical cutoff and perform physically accurate interpolation.

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Description

Intensities recorded by the microscopes (any imaging system with finite aperture) are subject to diffraction limit - the recorded features cannot be finer than the optical cutoff of the system. Filtering the spatial frequencies beyond the optical cutoff provides simple yet effective means of reducing noise. Since microscopy data is band-limited, padding in frequency domain provides accurate interpolation.

Required Products MATLAB
MATLAB release MATLAB 7.14 (R2012a)
Other requirements The function should work on any platform and any version.
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Updates
28 Feb 2013

* Added an example of improving a point spread function affected by Poisson noise.
* Sharpness of the frequency domain filter is now automatically calculated.
* Renamed the function.

01 Mar 2013

Previous submission contained wrong file.

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