F_VN_VarianceFilter

F_VN_VarianceFilter 1:

Calculates the local variance of an image.

Syntax

Definition:

FUNCTION F_VN_VarianceFilter : HRESULT
VAR_INPUT
    ipSrcImage  : ITcVnImage;
    ipDestImage : Reference To  ITcVnImage;
    nKernelSize : UDINT;
    hrPrev      : HRESULT;
END_VAR

F_VN_VarianceFilter 2: Inputs

Name

Type

Description

ipSrcImage

ITcVnImage

Source image. Only TCVN_ET_USINT Type is supported.

ipDestImage

Reference To ITcVnImage

Destination image of type TCVN_ET_UINT (An appropriate destination image will be created if required.)

nKernelSize

UDINT

Size of the kernel

hrPrev

HRESULT

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

F_VN_VarianceFilter 3: Return value

HRESULT

Required License

TC3 Vision Base

System Requirements

Development environment

Target platform

PLC libraries to include

TwinCAT V3.1. 4024.44 or later

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

Tc3_Vision