F_VN_ImageAverageStdDev

Computes the (channel-wise) average pixel value and the corresponding standard deviation of an image.

Syntax

Definition:

FUNCTION F_VN_ImageAverageStdDev : HRESULT
VAR_INPUT
    ipSrcImage : ITcVnImage;
END_VAR
VAR_IN_OUT
    aAverage   : TcVnVector4_LREAL;
    aStdDev    : TcVnVector4_LREAL;
END_VAR
VAR_INPUT
    hrPrev     : HRESULT;
END_VAR

Inputs

Name	Type	Description
ipSrcImage	ITcVnImage	Source image (1 - 4 channels)
hrPrev	HRESULT	HRESULT indicating the result of previous operations (If SUCCEEDED(hrPrev) equals false, no operation is executed.)

In/Outputs

Name	Type	Description
aAverage	TcVnVector4_LREAL	Returns the (channel-wise) average pixel value of ipSrcImage
aStdDev	TcVnVector4_LREAL	Returns the (channel-wise) pixel value standard deviation of ipSrcImage

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