OpenLvVision_OpenCv.lvlib:DftComplex.vim

Performs a forward DFT on an already complex image (Complex-to-Complex).

The function cv::dft performs one of the following:

  • Forward Fourier transform of a 1D vector of N elements:
    $ Y = F^{(N)} \cdot X $

    where

    $ F^{(N)}_{jk} = \exp\!\left(-\, 2\pi i\, \frac{jk}{N}\right), \qquad i = \sqrt{-1} $
  • Forward 2D Fourier transform of an $M \times N$ matrix:
    $ Y = F^{(M)} \cdot X \cdot F^{(N)} $

For detailed information, please refer to the OpenCV documentation

OpenLvVision_OpenCv.lvlib:DftComplex.vim

cerrcodeclst

error in

error in can accept error information wired from VIs previously called. Use this information to decide if any functionality should be bypassed in the event of errors from other VIs.

Right-click the error in control on the front panel and select Explain Error or Explain Warning from the shortcut menu for more information about the error.

    cbool

    		status

    status is TRUE (X) if an error occurred or FALSE (checkmark) to indicate a warning or that no error occurred.

    Right-click the error in control on the front panel and select Explain Error or Explain Warning from the shortcut menu for more information about the error.

    ci32

    		code

    cstr

    		source

    source describes the origin of the error or warning.

    Right-click the error in control on the front panel and select Explain Error or Explain Warning from the shortcut menu for more information about the error.

cOpenLvVision__OpenCv_lvlib_Anythinglvclass

SrcComplex

Copmplex input array/image

cOpenLvVision__OpenCv_lvlib_Anythinglvclass

DstComplex

output array/image whose type and size is the same as src

cbool

Rows

performs a forward transform of every individual row of the input matrix; this flag enables you to transform multiple vectors simultaneously and can be used to decrease the overhead (which is sometimes several times larger than the processing itself) to perform 3D and higher-dimensional transformations and so forth.

cbool

Scale

scales the result: divide it by the number of array elements.

ierrcodeclst

error out

error in can accept error information wired from VIs previously called. Use this information to decide if any functionality should be bypassed in the event of errors from other VIs.

Right-click the error in control on the front panel and select Explain Error or Explain Warning from the shortcut menu for more information about the error.

    ibool

    		status

    status is TRUE (X) if an error occurred or FALSE (checkmark) to indicate a warning or that no error occurred.

    Right-click the error in control on the front panel and select Explain Error or Explain Warning from the shortcut menu for more information about the error.

    ii32

    		code

    istr

    		source

    source describes the origin of the error or warning.

    Right-click the error in control on the front panel and select Explain Error or Explain Warning from the shortcut menu for more information about the error.

iOpenLvVision__OpenCv_lvlib_Anythinglvclass

DstComplex out