Fft Class Reference

Collection of FFT functions. More...

Classes
class	Filter
	Creation functions for FFT filters. More...

Static Public Member Functions
static FftImage	Forward (ImagePlane plane, FftNormalization normalization, FftWindow window)
	Calculate the Fourier transformation of an image.
static FftImage	Forward (ImagePlane plane, Rect aoi, FftNormalization normalization, FftWindow window)
	Calculate the Fourier transformation of an image.
static Image	Inverse (FftImage fftImg)
	Calculate the inverse Fourier transformation.
static Image	Inverse (FftImage fftImg, FftNormalization normalization)
	Calculate the inverse Fourier transformation.
static FftImage	Multiply (FftImage img1, FftImage img2)
	Multiply two compressed FFT images.
static FftImage	MultiplyConjugated (FftImage img1, FftImage img2)
	Multiply a compressed FFT image with the complex conjugate of another compressed FFT image.

Detailed Description

Collection of FFT functions.

Member Function Documentation

Forward() [1/2]

static FftImage Forward ( ImagePlane plane, FftNormalization normalization, FftWindow window )

static

Calculate the Fourier transformation of an image.

Parameters

plane	image to be transformed
normalization	normalization to apply
window	window to apply

Returns

transformed image

Exceptions

ObjectDisposedException

If the plane to work on has already been disposed.

Forward() [2/2]

static FftImage Forward ( ImagePlane plane, Rect aoi, FftNormalization normalization, FftWindow window )

static

Calculate the Fourier transformation of an image.

Parameters

plane	Image plane to be transformed.
aoi	Image region to be transformed.
normalization	Normalization to apply.
window	Window to apply.

Returns

Transformed image.

Exceptions

ObjectDisposedException

If the plane to work on has already been disposed.

Inverse() [1/2]

static Image Inverse ( FftImage fftImg )

static

Calculate the inverse Fourier transformation.

Parameters

fftImg

Fourier transformed image

Returns

Image in space domain

Exceptions

ArgumentNullException	If the input fftImg is null
ObjectDisposedException	If the input fftImg has already been disposed

Inverse() [2/2]

static Image Inverse ( FftImage fftImg, FftNormalization normalization )

static

Calculate the inverse Fourier transformation.

Only set a different normalization than FftImage.Normalization if appropriate as otherise the calculations result in erroneous values.

Parameters

fftImg	Fourier transformed image.
normalization	Normalization to apply.

Returns

Image in space domain.

Exceptions

ArgumentNullException	If the input fftImg is null
ObjectDisposedException	If the input fftImg has already been disposed

Multiply()

static FftImage Multiply ( FftImage img1, FftImage img2 )

static

Multiply two compressed FFT images.

Parameters

img1	Image 1 to multiply.
img2	Image 2 to multiply.

Returns

Multiplication result.

Exceptions

ArgumentNullException	If the input img1 is null
ObjectDisposedException	If the input img1 has already been disposed
ArgumentNullException	If the input img2 is null
ObjectDisposedException	If the input img2 has already been disposed

MultiplyConjugated()

static FftImage MultiplyConjugated ( FftImage img1, FftImage img2 )

static

Multiply a compressed FFT image with the complex conjugate of another compressed FFT image.

Note: the complex conjugate of img2 will be taken before multiplying.

Parameters

img1	Image 1 to multiply
img2	Image 2 to multiply

Returns

Multiplication result

Exceptions

ObjectDisposedException	If the input img1 has already been disposed
ArgumentNullException	If the input img2 is null
ObjectDisposedException	If the input img2 has already been disposed