F_VN_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:
FUNCTION F_VN_ContourConvexity : HRESULT
VAR_INPUT
ipContour : ITcVnContainer;
END_VAR
VAR_IN_OUT
fConvexity : LREAL;
END_VAR
VAR_INPUT
hrPrev : HRESULT;
END_VAR
Inputs
|
Name |
Type |
Description |
|---|---|---|
|
ipContour |
Single contour (ContainerType_Vector_TcVnPoint2_DINT or ContainerType_Vector_TcVnPoint2_REAL; The elements of this container are the points of the contour.) | |
|
hrPrev |
HRESULT indicating the result of previous operations (If SUCCEEDED(hrPrev) equals false, no operation is executed.) |
In/Outputs
|
Name |
Type |
Description |
|---|---|---|
|
fConvexity |
LREAL |
Returns the convexity of the contour [0..1] |
Return valueRequired 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 |