IG_FIP_FFT_forward_from_image
This function performs a forward Fast Fourier Transform.
Declaration:
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AT_ERRCOUNT ACCUAPI IG_FIP_FFT_forward_from_image(
HIGEAR hIGear,
LPHIGCOMPLEXOBJ lphIGComplexObj,
enumIGFFTScalingMethods nScalingMethod,
AT_BOOL bCenterTransform
);
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Arguments:
Name |
Type |
Description |
hIGear |
HIGEAR |
Handle of the image to be processed. |
lphIGComplexObj |
LPHIGCOMPLEXOBJ |
Handle of the result data. |
nScalingMethod |
enumIGFFTScalingMethods |
Specifies the method of scaling the result data. |
bCenterTransform |
AT_BOOL |
Flag to indicate whether to center the transform. |
Return Value:
Returns the number of ImageGear errors that occurred during this function call.
Supported Raster Image Formats:
Grayscale - 8, 16, 32 bpp.
Sample:
FreqIP
Example:
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HIGEAR hIGear; /* Handle of input image */
HIGCOMPLEXOBJ hIGComplexObjOut; /* Handle of output data */
...
IG_FIP_FFT_forward_from_image(hIGear, &hIGComplexObjOut, IG_FFT_SCALING_SQRTN, TRUE);
...
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Remarks:
The difference between this function and IG_FIP_FFT_forward() is that this function takes a HIGEAR as the input.