DisplayFourierTransformation Method (ILEADRasterProcess)

Syntax	short DisplayFourierTransformation(ILEADRaster* pRaster, long lFlags)
Overview	Refer to Removing Noise

Remarks

(Raster Pro and above toolkits) Displays the results of a Fast Fourier Transform or a Discrete Fourier analysis as a bitmap.

This method converts the storage array computed by the DiscreteFourierTransformation method or FastFourierTransformation method into a bitmap. The resulting bitmap may be displayed such that it shows either the frequency harmonics amplitude data or phase data. The (0,0) frequency is located in the bitmap center, positive X harmonics in the right half and positive Y harmonics located in the lower half of the bitmap.

This method does not support 12 and 16-bit grayscale and 48 and 64-bit color images. If the image is 12 and 16-bit grayscale and 48 and 64-bit color, the function will not return an error.

This method does not work on regions. If a bitmap has a region the method ignores it and processes the entire bitmap.

This method does not support signed data images. It returns the error code ERROR_SIGNED_DATA_NOT_SUPPORTED if a signed data image is passed to this method.

Elements:	DiscreteFourierTransformation method, DirectionEdgeStatistical method, FastFourierTransformation method, InitFourierTransformation method, FrequencyFilter method, FrequencyFilterMask method, FreeFourierTransformation method
Topics:	Raster Images: Fourier Transform Functions