F_VN_MatchDescriptorsBFExp

Match descriptors using a brute force approach. (expert function)
Can use available TwinCAT Job Tasks for executing parallel code regions.

Syntax

Definition:

FUNCTION F_VN_MatchDescriptorsBFExp : HRESULT
VAR_INPUT
    ipQueryDescriptors : ITcVnImage;
    ipTrainDescriptors : ITcVnImage;
    ipMatches          : Reference To  ITcVnContainer;
    ipMask             : ITcVnImage;
    eNormType          : ETcVnNormalizationType;
    bCrossCheck        : BOOL;
    hrPrev             : HRESULT;
END_VAR

Inputs

Name	Type	Description
ipQueryDescriptors	ITcVnImage	Query descriptors (i.e. descriptors of a reference/template image)
ipTrainDescriptors	ITcVnImage	Training descriptors (i.e. descriptors of a source/input image)
ipMatches	Reference To ITcVnContainer	Returns a container which is filled with the descriptor matches (ContainerType_Vector_TcVnDMatch; Non-zero interface pointers are reused.)
ipMask	ITcVnImage	Mask to specify permissable matches, i.e. query[i] can be matched with train[j] only if mask[i][j] != 0 (set to 0 if no mask required)
eNormType	ETcVnNormalizationType	Normalization type (only L1, L2, L2SQR, HAMMING, HAMMING2 supported). HAMMING2 should be used for ORB descriptors if the ORB nBriefPoints parameter is 3 or 4)
bCrossCheck	BOOL	If true, only consistent matches are returned, i.e. query->train and train->query detect the same match
hrPrev	HRESULT	HRESULT indicating the result of previous operations (If SUCCEEDED(hrPrev) equals false, no operation is executed.)

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