SobelFilter

Calculates the first, second, third, or mixed image derivatives using an extended Sobel filter.

Syntax

Definition:

HRESULT SobelFilter(
    HRESULT                        hrPrev,
    ITcVnImage*                    ipSrcImage,
    ITcVnImage*&                   ipDestImage,
    ETcVnElementType               eDestDepth,
    ULONG                          nXOrder,
    ULONG                          nYOrder,
    ULONG                          nKernelSize = 3,
    double                         fScale = 1,
    double                         fDelta = 0,
    ETcVnBorderInterpolationMethod eBorderType = BIM_DEFAULT
)

Parameters

Name

Type

Default

Description

hrPrev

HRESULT

 

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

ipSrcImage

ITcVnImage*

 

Source image

ipDestImage

ITcVnImage*&

 

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

eDestDepth

ETcVnElementType

 

Destination image depth

nXOrder

ULONG

 

Order of the x-derivative (must be < nKernelSize)

nYOrder

ULONG

 

Order of the y-derivative (must be < nKernelSize)

nKernelSize

ULONG

3

Size of the extended Sobel kernel (3, 5, 7, ..., 31)

fScale

double

1

Scale factor for the computed derivative values

fDelta

double

0

Delta value that is added to the results prior to storing them in dest

eBorderType

ETcVnBorderInterpolationMethod

BIM_DEFAULT

Image border handling

SobelFilter 1: 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