F_VN_WarpPerspectiveExp

F_VN_WarpPerspectiveExp 1:

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

F_VN_WarpPerspectiveExp 2: 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.)

F_VN_WarpPerspectiveExp 3: In/Outputs

Name

Type

Description

aTransformationMatrix

TcVnMatrix3x3_LREAL

Perspective transformation matrix

F_VN_WarpPerspectiveExp 4: 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