Generates an incoherent OTF
#include "dip_microscopy.h"
dip_Error dip_IncoherentOTF ( out, defocus, xNyquist, amplitude, otf )
Output: sfloat
This function implements the formulae for a (defocused) incoherent OTF as described by Castleman. When defocus is unequal to zero, either the Stokseth approximation or the Hopkins approximation is used. The defocus is defined a the maximum defocus path length error divided by the wave length (See Castleman for details). The summation over the Bessel functions in the Hopkins formluation, is stopped when the change is smaller than DIP_MICROSCOPY_HOPKINS_OTF_CUTOFF.
| Data type | Name | Description |
| dip_Image | out | Output |
| dip_float | defocus | Defocus |
| dip_float | xNyquist | Oversampling |
| dip_float | amplitude | Amplitude |
| dipf_IncoherentOTF | otf | Otf approximation |
The dipf_IncoherentOTF enumeration supports the following flags:
| Name | Description |
| DIP_MICROSCOPY_OTF_STOKSETH | Stokseth OTF approximation |
| DIP_MICROSCOPY_OTF_HOPKINS | Hopkins OTF approximation |
K.R. Castleman, "Digital image processing, second edition", Prentice Hall, Englewood Cliffs, 1996.