F_VN_KeyPointsSBExp

F_VN_KeyPointsSBExp 1:

Detects keypoints using a Simple Blob method (expert function) - several iterations apply different thresholds to source image - connected components (blobs) are detected - the center and radius of the blobs are returned as keypoints
Can use available TwinCAT Job Tasks for executing parallel code regions.

Syntax

Definition:

FUNCTION F_VN_KeyPointsSBExp : HRESULT
VAR_INPUT
    ipSrcImage  : ITcVnImage;
    ipKeyPoints : Reference To  ITcVnContainer;
    ipMask      : ITcVnImage;
END_VAR
VAR_IN_OUT
    stParams    : TcVnParamsSB;
END_VAR
VAR_INPUT
    hrPrev      : HRESULT;
END_VAR

F_VN_KeyPointsSBExp 2: Inputs

Name

Type

Description

ipSrcImage

ITcVnImage

Source image

ipKeyPoints

Reference To ITcVnContainer

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

ipMask

ITcVnImage

Mask to specify, where to look for keypoints (optional, set to 0 if not required)

hrPrev

HRESULT

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

F_VN_KeyPointsSBExp 3: In/Outputs

Name

Type

Description

stParams

TcVnParamsSB

Several parameters to filter the detected blobs

F_VN_KeyPointsSBExp 4: Return value

HRESULT

Required License

TC3 Vision Matching

System Requirements