F_VN_WarpPerspectiveExp

Apply a perspective transformation to an image. (expert function)
Can use available TwinCAT Job Tasks for executing parallel code regions.
Can return partial results when canceled by Watchdog.

Syntax

Definition:

FUNCTION F_VN_WarpPerspectiveExp : HRESULT
VAR_INPUT
    ipSrcImage            : ITcVnImage;
    ipDestImage           : Reference To  ITcVnImage;
END_VAR
VAR_IN_OUT
    aTransformationMatrix : TcVnMatrix3x3_LREAL;
END_VAR
VAR_INPUT
    nDestWidth            : UDINT;
    nDestHeight           : UDINT;
    eInterpolationType    : ETcVnInterpolationType;
    bWarpInverse          : BOOL;
    eBorderInterpolation  : ETcVnBorderInterpolationMethod;
    fBorderValue          : LREAL;
    hrPrev                : HRESULT;
END_VAR

Inputs

Name	Type	Description
ipSrcImage	ITcVnImage	Source image
ipDestImage	Reference To ITcVnImage	Destination image (An appropriate image will be created if required.)
nDestWidth	UDINT	Width of the destination image
nDestHeight	UDINT	Height of the destination image
eInterpolationType	ETcVnInterpolationType	Interpolation method
bWarpInverse	BOOL	Handle aTransformationMatrix as the inverse transformation
eBorderInterpolation	ETcVnBorderInterpolationMethod	Border interpolation method (ISOLATED not supported)
fBorderValue	LREAL	Border value, if CONSTANT is used
hrPrev	HRESULT	HRESULT indicating the result of previous operations (If SUCCEEDED(hrPrev) equals false, no operation is executed.)

In/Outputs

Name	Type	Description
aTransformationMatrix	TcVnMatrix3x3_LREAL	Perspective transformation matrix

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