Name
power_lnpower_lnPowerLnpower_lnPowerLnPowerLn — Return the power spectrum of a complex image.
power_lnpower_lnPowerLnpower_lnPowerLnPowerLn computes the power spectrum from the real and
imaginary parts of a Fourier-transformed image (see
fft_imagefft_imageFftImagefft_imageFftImageFftImage), i.e., the modulus of the frequencies.
Additionally, the natural logarithm is applied to the result. The
result image is of type 'real'"real""real""real""real""real". The following formula is
used:
- Multithreading type: reentrant (runs in parallel with non-exclusive operators).
- Multithreading scope: global (may be called from any thread).
- Automatically parallelized on tuple level.
- Automatically parallelized on channel level.
- Automatically parallelized on domain level.
Input image in frequency domain.
Power spectrum of the input image.
read_image(&Image,"monkey");
disp_image(Image,WindowHandle);
fft_image(Image,&FFT);
power_ln(FFT,&Power);
disp_image(Power,WindowHandle);
power_lnpower_lnPowerLnpower_lnPowerLnPowerLn returns 2 (H_MSG_TRUE) if the image is of correct
type. If the input is empty the behavior can be set via
set_system(::'no_object_result',<Result>:)set_system("no_object_result",<Result>)SetSystem("no_object_result",<Result>)set_system("no_object_result",<Result>)SetSystem("no_object_result",<Result>)SetSystem("no_object_result",<Result>).
If necessary, an exception is raised.
fft_imagefft_imageFftImagefft_imageFftImageFftImage,
fft_genericfft_genericFftGenericfft_genericFftGenericFftGeneric,
rft_genericrft_genericRftGenericrft_genericRftGenericRftGeneric,
convol_fftconvol_fftConvolFftconvol_fftConvolFftConvolFft,
convol_gaborconvol_gaborConvolGaborconvol_gaborConvolGaborConvolGabor
disp_imagedisp_imageDispImagedisp_imageDispImageDispImage,
convert_image_typeconvert_image_typeConvertImageTypeconvert_image_typeConvertImageTypeConvertImageType,
scale_imagescale_imageScaleImagescale_imageScaleImageScaleImage
abs_imageabs_imageAbsImageabs_imageAbsImageAbsImage,
convert_image_typeconvert_image_typeConvertImageTypeconvert_image_typeConvertImageTypeConvertImageType,
power_realpower_realPowerRealpower_realPowerRealPowerReal,
power_bytepower_bytePowerBytepower_bytePowerBytePowerByte
fft_imagefft_imageFftImagefft_imageFftImageFftImage,
fft_genericfft_genericFftGenericfft_genericFftGenericFftGeneric,
rft_genericrft_genericRftGenericrft_genericRftGenericRftGeneric
Foundation