Threshold

Apply a fixed threshold or a dynamic threshold according to Otsu.
Can use available TwinCAT Job Tasks for executing parallel code regions.
Can return partial results when canceled by Watchdog.

Syntax

Definition:

HRESULT Threshold(
    HRESULT            hrPrev,
    ITcVnImage*        ipSrcImage,
    ITcVnImage*&       ipDestImage,
    double             fThreshold,
    double             fMaxValue,
    ETcVnThresholdType eThresholdType
)

Parameters

Name	Type	Description
hrPrev	HRESULT	HRESULT indicating the result of previous operations (If SUCCEEDED(hrPrev) equals false, no operation is executed.)
ipSrcImage	ITcVnImage*	Source image (For Otsu and Triangle threshold types, only 1 channel of TCVN_ET_USINT is supported)
ipDestImage	ITcVnImage*&	Destination image (An appropriate destination image will be created if required.)
fThreshold	double	Fixed threshold (unused if dynamic thresholding is selected)
fMaxValue	double	Maximum pixel value
eThresholdType	ETcVnThresholdType	Threshold type to be applied

Return value

HRESULT

Required License

TC3 Vision Base

System Requirements

Development environment	Target platform	PLC libraries to include
TwinCAT V3.1. 4024.44 or later	PC or CX (x64) with PL50, e.g. Intel 4-core Atom CPU	Tc3_Vision