F_VN_DetectPatternPoints

Detects calibration pattern points (circles) within the provided image.
Can use available TwinCAT Job Tasks for executing parallel code regions.

Syntax

Definition:

FUNCTION F_VN_DetectPatternPoints : HRESULT
VAR_INPUT
    ipSrcImage            : ITcVnImage;
    ipPatternPoints       : Reference To  ITcVnContainer;
END_VAR
VAR_IN_OUT
    stBlobDetectionParams : TcVnParamsBlobDetection;
END_VAR
VAR_INPUT
    nNumberOfPoints       : UDINT;
    hrPrev                : HRESULT;
END_VAR

Inputs

Name	Type	Description
ipSrcImage	ITcVnImage	Source image (USINT, 1 channel)
ipPatternPoints	Reference To ITcVnContainer	Returns the pattern point positions (ContainerType_Vector_TcVnPoint2_REAL; Non-zero interface pointers are reused.)
nNumberOfPoints	UDINT	Expected number of pattern points
hrPrev	HRESULT	HRESULT indicating the result of previous operations (If SUCCEEDED(hrPrev) equals false, no operation is executed.)

In/Outputs

Name	Type	Description
stBlobDetectionParams	TcVnParamsBlobDetection	Parameters to detect and filter contours.

Return value

HRESULT

Required License

TC3 Vision Metrology 2D

System Requirements

Development environment	Target platform	PLC libraries to include
TwinCAT V3.1.4024.54 or later	PC or CX (x64) with PL50, e.g. Intel 4-core Atom CPU	Tc3_Vision