GXFFT2 class¶

class geosoft.gx.GXFFT2¶

2-D Fast Fourier Transforms
These methods now work with an IMG object, instead of creating
their own FFT2 object.

static fft2_in((GXContext)ctx, (GXIMG)arg1, (str)arg2, (str)arg3) → None:¶

FFT2 transform

Parameters:	ctx (`geosoft.gx.GXContext`) – The GX execution context arg1 (`geosoft.gx.GXIMG`) – Input image arg2 (str) – Output Transform file name string arg3 (str) – Output Power Spectrum file name string
Returns:	Nothing
Return type:	None

New in version 5.0.0.

static filter_pg((GXContext)ctx, (GXPG)arg1, (str)arg2, (GXTR)arg3, (float)arg4, (float)arg5, (float)arg6) → None:¶

Apply 2D FFT filters to data in pager

Parameters:	ctx (`geosoft.gx.GXContext`) – The GX execution context arg1 (`geosoft.gx.GXPG`) – pager obj arg2 (str) – sConFil - FFT filter control file arg3 (`geosoft.gx.GXTR`) – TR obj arg4 (float) – rDx - X increment arg5 (float) – rDy - Y increment arg6 (float) – rRot- Rotation degree
Returns:	Nothing
Return type:	None

New in version 5.0.0.

static flt((GXContext)ctx, (GXIMG)arg1, (str)arg2, (str)arg3) → None:¶

FFT2 filter

Parameters:	ctx (`geosoft.gx.GXContext`) – The GX execution context arg1 (`geosoft.gx.GXIMG`) – Input image (Transform grid) arg2 (str) – Output file (Transform grid) arg3 (str) – Control file
Returns:	Nothing
Return type:	None

New in version 5.0.0.

static flt_inv((GXContext)ctx, (GXIMG)arg1, (str)arg2, (str)arg3) → None:¶

FFT2 filter and inverse

Parameters:	ctx (`geosoft.gx.GXContext`) – The GX execution context arg1 (`geosoft.gx.GXIMG`) – Input image (Transform grid) arg2 (str) – Output file arg3 (str) – Control file
Returns:	Nothing
Return type:	None

New in version 5.0.0.

static pow_spc((GXContext)ctx, (GXIMG)arg1, (str)arg2) → None:¶

FFT2 transform power spectrum

Parameters:	ctx (`geosoft.gx.GXContext`) – The GX execution context arg1 (`geosoft.gx.GXIMG`) – Input image (Transform grid) arg2 (str) – Output Power Spectrum file name string
Returns:	Nothing
Return type:	None

New in version 5.0.0.

static rad_spc((GXContext)ctx, (GXIMG)arg1, (str)arg2) → None:¶

FFT2 transform Radially averaged power spectrum

Parameters:	ctx (`geosoft.gx.GXContext`) – The GX execution context arg1 (`geosoft.gx.GXIMG`) – Input image (Transform grid) arg2 (str) – Output Radial Spectrum file name string
Returns:	Nothing
Return type:	None

New in version 5.0.0.

static rad_spc1((GXContext)ctx, (GXIMG)arg1, (GXVV)arg2) → None:¶

FFT2 transform Radially averaged power spectrum for one IMG

Parameters:	ctx (`geosoft.gx.GXContext`) – The GX execution context arg1 (`geosoft.gx.GXIMG`) – Input image (Transform grid) arg2 (`geosoft.gx.GXVV`) – Output Radial Spectrum VV
Returns:	Nothing
Return type:	None

New in version 7.2.0.

static rad_spc2((GXContext)ctx, (GXIMG)arg1, (GXIMG)arg2, (GXVV)arg3, (GXVV)arg4, (int)arg5) → None:¶

FFT2 transform Radially averaged power spectrum for two IMGs

Parameters:	ctx (`geosoft.gx.GXContext`) – The GX execution context arg1 (`geosoft.gx.GXIMG`) – Input image1 (Transform grid1 - G) arg2 (`geosoft.gx.GXIMG`) – Input image2 (Transform grid2 - H) arg3 (`geosoft.gx.GXVV`) – Output Radial Spectrum VV arg4 (`geosoft.gx.GXVV`) – Output Radial Spectrum Standard deviation VVst (Null: no calc) arg5 (int) – lOpt - 1: <Re(GH/HH)> VV; 0: <Re(GH*)> VV
Returns:	Nothing
Return type:	None

New in version 7.2.0.

static td_xd_y((GXContext)ctx, (GXIMG)arg1, (GXIMG)arg2, (str)arg3, (int)arg4) → None:¶

FFT2 filter (calculate T from the derivatives Tx and Ty)

Parameters:	ctx (`geosoft.gx.GXContext`) – The GX execution context arg1 (`geosoft.gx.GXIMG`) – Input dX image (Transform grid) arg2 (`geosoft.gx.GXIMG`) – Input dY image (Transform grid) arg3 (str) – Output T file name arg4 (int) – 0 - no invers, 1 - invers FFT applied
Returns:	Nothing
Return type:	None

New in version 5.0.1.

static trans_pg((GXContext)ctx, (GXPG)arg1, (int)arg2) → None:¶

Apply 2D FFT transform to data in pager

Parameters:	ctx (`geosoft.gx.GXContext`) – The GX execution context arg1 (`geosoft.gx.GXPG`) – pager obj arg2 (int) – FFT2_PG constants
Returns:	Nothing
Return type:	None

New in version 5.0.0.

FFT2_PG constants¶

Pager Direction