Update: 08 January 2010

Inverse Discrete Fourier Transform

The Inverse Discrete Fourier Transform (I-DFT) translates two frequency-domain images into one spatial-domain image. Mathematically speaking, this a complex transformation. Both input images are either the real and the imaginary parts, or the modulus and the argument of a DFT. All other image couples will produce an unpredictable - and likely false - result.

Hence, both input images shall :

For more information on the DFT_ORD and the DFT_TYPE keywords, refer to the Discrete Fourier Transform command.
The result of the I-DFT processing will be displayed and saved in the current image directory as "image.fit". If there were a file with the very same name, its content will be overridden.
The output image is encoded with unsigned 16-bits words.