phase_rad

Herror ::phase_rad ( Hobject ImageComplex, Hobject *ImagePhase ) HImage HImage::PhaseRad ( void ) const HImageArray HImageArray::PhaseRad ( void ) const

Return the phase of a complex image in radians.

::phase_rad computes the phase of a complex image in radians. The following formula is used:

  phase = atan(imaginary part/real part) .

Parameters

`ImageComplex` (input_object)	image(-array) `->` Hobject: HImage(Array) ( complex )
Input image in frequency domain.

`ImagePhase` (output_object)	image(-array) `->` Hobject : HImage(Array)* ( real )
Phase of the image in radians.

Example

read_image(&Image,"affe");
disp_image(Image,WindowHandle);
fft_image(Image,&FFT);
phase_rad(FFT,&Phase);
disp_image(Phase,WindowHandle);

Result

::phase_rad returns H_MSG_TRUE if the image is of correct type. If the input is empty the behaviour can be set via ::set_system('no_object_result',<Result>). If necessary, an exception handling is raised.

Possible Predecessors

::fft_image, ::fft_generic

Possible Successors

::disp_image

Alternatives

::phase_deg

See also

::fft_image_inv

Module

Image filters