KeyPointsGFTT

Detects keypoints using the GFTT method, which detects strong corners.
Can use available TwinCAT Job Tasks for executing parallel code regions.

Syntax

Definition:

HRESULT KeyPointsGFTT(
    HRESULT          hrPrev,
    ITcVnImage*      ipSrcImage,
    ITcVnContainer*& ipKeyPoints,
    ITcVnImage*      ipMask = nullptr,
    TcVnParamsGFTT&  stParams = {1000, 0.01, 1, 3, false, 0.04}
)

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

ipKeyPoints

ITcVnContainer*&

 

Returns a container which is filled with the keypoints (ContainerType_Vector_TcVnKeyPoint; Non-zero interface pointers are reused.)

ipMask

ITcVnImage*

nullptr

Mask to specify, where to look for keypoints (set to 0 if no mask required)

stParams

TcVnParamsGFTT&

{1000, 0.01, 1, 3, false, 0.04}

Additional expert parameters

KeyPointsGFTT 1: Return value

HRESULT

Required License

TC3 Vision Matching

System Requirements

Development environment

Target platform

PLC libraries to include

TwinCAT V3.1.4024.59 or later

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

Tc3_Vision