OpenLvVision_OpenCv.lvlib:Subtract.vim

Calculates the per-element difference between two arrays or array and a scalar.

The function subtract calculates:

  • Difference between two arrays (when both input arrays have the same size and the same number of channels):
    $ \texttt{dst}(I) = \texttt{saturate}(\texttt{src1}(I) - \texttt{src2}(I)) \quad \texttt{if mask}(I) \ne 0 $
  • Difference between an array and a scalar (when src2 is constructed from Scalar or has the same number of elements as src1.channels()):
    $ \texttt{dst}(I) = \texttt{saturate}(\texttt{src1}(I) - \texttt{src2}) \quad \texttt{if mask}(I) \ne 0 $
  • Difference between a scalar and an array (when src1 is constructed from Scalar or has the same number of elements as src2.channels()):
    $ \texttt{dst}(I) = \texttt{saturate}(\texttt{src1} - \texttt{src2}(I)) \quad \texttt{if mask}(I) \ne 0 $
  • Reverse difference (SubRS variant) between a scalar and an array:
    $ \texttt{dst}(I) = \texttt{saturate}(\texttt{src2} - \texttt{src1}(I)) \quad \texttt{if mask}(I) \ne 0 $

Where I is a multi-dimensional index of array elements. In case of multi-channel arrays, each channel is processed independently.

For detailed information, please refer to the OpenCV documentation

OpenLvVision_OpenCv.lvlib:Subtract.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

Src1

First input array or image

cOpenLvVision__OpenCv_lvlib_Anythinglvclass

Src2

Second input array, image or constant

cOpenLvVision__OpenCv_lvlib_Anythinglvclass

Dst

Output array or image that has the same size and number of channels as the input arrays or image.

the depth is defined by src1/src2.

cOpenLvVision__OpenCv_lvlib_Anythinglvclass

Mask

Mask - 8-bit single channel array or image, that specifies elements of the output image to be changed.

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

Dst out

Output array or image that has the same size and number of channels as the input arrays or image.

the depth is defined by src1/src2.