F_VN_AdjustActiveContour

F_VN_AdjustActiveContour 1:

Adjust active contour (snake) in order to minimize its cummulative (internal and external) energy.

Syntax

Definition:

FUNCTION F_VN_AdjustActiveContour : HRESULT
VAR_INPUT
    ipImage         : ITcVnImage;
    ipActiveContour : ITcVnContainer;
    fAlpha          : REAL;
    fBeta           : REAL;
    fGamma          : REAL;
    nWindowWidth    : UDINT;
    nWindowHeight   : UDINT;
    nMaxIterations  : UDINT;
    bUseGradient    : BOOL;
    hrPrev          : HRESULT;
END_VAR

F_VN_AdjustActiveContour 2: Inputs

Name

Type

Description

ipImage

ITcVnImage

Source image (1 channel, USINT elements)

ipActiveContour

ITcVnContainer

Initial contour, which will be adjusted

fAlpha

REAL

Continuity energy coefficient

fBeta

REAL

Curvature energy coefficient

fGamma

REAL

Image energy coefficient

nWindowWidth

UDINT

Window width (3, 5, 7, ...)

nWindowHeight

UDINT

Window height (3, 5, 7, ...)

nMaxIterations

UDINT

Maximum iterations

bUseGradient

BOOL

If true, the gradient magnitude is used as image energy (otherwise: pixel intensity)

hrPrev

HRESULT

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

F_VN_AdjustActiveContour 3: 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