F_VN_ContourCircularityExp

F_VN_ContourCircularityExp 1:

Computes the circularity of a contour (1.0: ideal circle, 0.0: straight line). (expert function)

Syntax

Definition:

FUNCTION F_VN_ContourCircularityExp : HRESULT
VAR_INPUT
    ipContour    : ITcVnContainer;
END_VAR
VAR_IN_OUT
    fCircularity : LREAL;
END_VAR
VAR_INPUT
    eMethod      : ETcVnCircularityCalculationMethod;
    hrPrev       : HRESULT;
END_VAR

 Inputs

Name

Type

Description

ipContour

ITcVnContainer

Single contour (ContainerType_Vector_TcVnPoint2_DINT or ContainerType_Vector_TcVnPoint2_REAL; The elements of this container are the points of the contour.)

eMethod

ETcVnCircularityCalculationMethod

Method used for computing the circularity

hrPrev

HRESULT

HRESULT indicating the result of previous operations (If SUCCEEDED(hrPrev) equals false, no operation is executed.)

 In/Outputs

Name

Type

Description

fCircularity

LREAL

Returns the circularity of the contour [0..1]

 Return value

HRESULT

Required License

TC3 Vision Base

System Requirements

Development environment

Target platform

PLC libraries to include

TwinCAT V3.1.4024.59 or later

PC or CX (x64) with min. PL50, e.g. Intel 4-core Atom CPU

Tc3_Vision