DrawKeypoints

Draws the keypoints for visualization purpose.

Syntax

Definition:

HRESULT DrawKeypoints(
    HRESULT               hrPrev,
    ITcVnImage*           ipSrcImage,
    ITcVnContainer*       ipKeyPoints,
    ITcVnImage*&          ipDestImage,
    TcVnVector4_LREAL&    aColor = {-1, -1, -1, -1},
    ETcVnDrawMatchesFlags eFlags = DMF_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 (elements of type USINT)

ipKeyPoints

ITcVnContainer*

 

Container with the keypoints (ContainerType_Vector_TcVnKeyPoint)

ipDestImage

ITcVnImage*&

 

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

aColor

TcVnVector4_LREAL&

{-1, -1, -1, -1}

Color to draw the keypoints (for {-1, -1, -1, -1}, a random color is chosen for each point)

eFlags

ETcVnDrawMatchesFlags

DMF_DEFAULT

A combination of flags to support overdrawing an existing destination image and/or drawing additional (Rich-)Keypoint information (size and orientation)

DrawKeypoints 1: Return value

HRESULT

Required License

TC3 Vision Matching

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