IGF



Publikacja

Three filters for visualization of phase objects with large variations of phase gradients

Sagan A., Antosiewicz T.J., Szoplik T.

Typ publikacji:
Publikacja naukowa recenzowana (Science Citation Index)

Applied Optics

48(6), 2009, 1143-1152, 10.1364/AO.48.001143

Jednostka organizacyjna:
IGF, ZOI

We propose three amplitude filters for visualization of phase objects. They interact with the spectra of pure-phase objects in the frequency plane and are based on tangent and error functions as well as antisymmetric combination of square roots. The error function is a normalized form of the Gaussian function. The antisymmetric square-root filter is composed of two square-root filters to widen its spatial frequency spectral range. Their advantage over other known amplitude frequency-domain filters, such as linear or square-root graded ones, is that they allow high-contrast visualization of objects with large variations of phase gradients.


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