fft_image

fft_image_inv ( Image : ImageFFTInv : : )

Compute the inverse fast Fourier transform of an image.

fft_image_inv calculates the inverse Fourier transform of the input image (Image), i.e., it transforms the image back into the spatial domain. This corresponds to the call

fft_generic(Image,ImageFFT,'from_freq',1,'sqrt','dc_center','byte')

Attention

The filtering is always done on the entire image, i.e., the region of the image is ignored.

Parameters

`Image` (input_object)	image(-array) `->` object : complex
Input image.

`ImageFFTInv` (output_object)	image(-array) `->` object : byte
Inverse-Fourier-transformed image.

Result

fft_image_inv returns 2 (H_MSG_TRUE) if the input image is of correct type. If the input is empty the behavior can be set via set_system(::'no_object_result',<Result>:). If necessary, an exception handling is raised.

Parallelization Information

fft_image_inv is reentrant and automatically parallelized (on tuple level).

Possible Predecessors

convol_fft, convol_gabor, fft_image, optimize_fft_speed, read_fft_optimization_data

Possible Successors

convert_image_type, energy_gabor

Alternatives

fft_generic, rft_generic

Module

Foundation