ContourConvexity

Computes the convexity of a contour as the ratio between the contour's area and the area of the convex hull (1.0: convex shapes (i.e. rectangle, circle, ..., etc.), 0.0: zero area (i.e. a line or an empty contour)).

Syntax

Definition:

HRESULT ContourConvexity(
    HRESULT         hrPrev,
    ITcVnContainer* ipContour,
    double&         fConvexity
)

Parameters

Name

Type

Description

hrPrev

HRESULT

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

ipContour

ITcVnContainer*

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

fConvexity

double&

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

ContourConvexity 1: Return value

HRESULT

Required License

TC3 Vision Base

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