TcVnParamsSB

Offers parameters for SB method (a simple blob detector with multiple thresholds).

Syntax

Definition:

TYPE TcVnParamsSB :
STRUCT
    bFilterByArea        : BOOL;
    bFilterByCircularity : BOOL;
    bFilterByColor       : BOOL;
    bFilterByConvexity   : BOOL;
    bFilterByInertia     : BOOL;
    fMinArea             : REAL;
    fMaxArea             : REAL;
    fMinCircularity      : REAL;
    fMaxCircularity      : REAL;
    nBlobColor           : USINT;
    fMinConvexity        : REAL;
    fMaxConvexity        : REAL;
    fMinInertiaRatio     : REAL;
    fMaxInertiaRatio     : REAL;
    fMinBlobDist         : REAL;
    nMinRepeatability    : UDINT;
    fMinThreshold        : REAL;
    fMaxThreshold        : REAL;
    fThresholdStep       : REAL;
END_STRUCT
END_TYPE

Parameters

Name	Type	Default	Description
bFilterByArea	BOOL	TRUE	Enable filtering by area (fMinArea <= area < fMaxArea).
bFilterByCircularity	BOOL	FALSE	Enable filtering by circularity (fMinCircularity <= circularity(4pi * area / perimeter^2) < fMaxCircularity).
bFilterByColor	BOOL	FALSE	Enable filtering by color (thresholdedColor(0 or 255) = nBlobColor).
bFilterByConvexity	BOOL	FALSE	Enable filtering by convexity (fMinConvexity <= convexity(area / hullArea) < fMaxConvexity).
bFilterByInertia	BOOL	FALSE	Enable filtering by inertia ratio (fMinInertiaRatio <= inertia ratio < fMaxInertiaRatio).
fMinArea	REAL	25	Min estimated blob area in pixel
fMaxArea	REAL	15000	Max estimated blob area in pixel
fMinCircularity	REAL	0	Min circularity (1.0: ideal circle, < 1: less circular, 0: not circular at all)
fMaxCircularity	REAL	1	Max circularity (1.0: ideal circle, < 1: less circular, 0: not circular at all)
nBlobColor	USINT	255	0 or 255
fMinConvexity	REAL	0	Min convexity (1.0: blob fully convex, < 1: less convex)
fMaxConvexity	REAL	1	Max convexity (1.0: blob fully convex, < 1: less convex)
fMinInertiaRatio	REAL	0	Min inertia ratio (0.0 .. 1.0)
fMaxInertiaRatio	REAL	1	Max inertia ratio (0.0 .. 1.0)
fMinBlobDist	REAL	5	Min distance between different blobs
nMinRepeatability	UDINT	2	Min number of same detected blobs (dist < fMinBlobDist) in different thresholds
fMinThreshold	REAL	30	Min threshold (start)
fMaxThreshold	REAL	225	Max threshold (stop)
fThresholdStep	REAL	10	Threshold step between min and max threshold