HoughLines
Search for lines using the standard Hough transform.
Syntax
Definition:
HRESULT HoughLines(
HRESULT hrPrev,
ITcVnImage* ipSrcImage,
ITcVnContainer*& ipLines,
double fDistRes,
double fAngleRes,
ULONG nAccuThreshold,
double fDistResDiv = 0,
double fAngleResDiv = 0
)
Parameters
|
Name |
Type |
Default |
Description |
|---|---|---|---|
|
hrPrev |
|
HRESULT indicating the result of previous operations (If SUCCEEDED(hrPrev) equals false, no operation is executed.) | |
|
ipSrcImage |
|
Source image (USINT, 1 channel, binary, may be modified by the function) | |
|
ipLines |
|
Returns a container which is filled with the found lines (ContainerType_Vector_TcVnVector2_REAL; Each container element contains the distance from the origin [0] in pixels and the rotation angle [1] in radians, respectively. Non-zero interface pointers are reused.) | |
|
fDistRes |
double |
|
Distance resolution of the accumulator (in pixels, must be > 0) |
|
fAngleRes |
double |
|
Angle resolution of the accumulator (in radians, must be > 0) |
|
nAccuThreshold |
ULONG |
|
Accumulator threshold |
|
fDistResDiv |
double |
0 |
Divisor of the distance resolution for the multi-scale Hough transform (>= 0, must be > 0 if fAngleResDiv is > 0) |
|
fAngleResDiv |
double |
0 |
Divisor of the angle resolution for the multi-scale Hough transform (>= 0, must be > 0 if fDistResDiv is > 0) |
Return valueRequired 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 |