TcVnParamsSB

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

Syntax

Definition:

struct TcVnParamsSB
{
    bool          bFilterByArea;
    bool          bFilterByCircularity;
    bool          bFilterByColor;
    bool          bFilterByConvexity;
    bool          bFilterByInertia;
    float         fMinArea;
    float         fMaxArea;
    float         fMinCircularity;
    float         fMaxCircularity;
    unsigned char nBlobColor;
    float         fMinConvexity;
    float         fMaxConvexity;
    float         fMinInertiaRatio;
    float         fMaxInertiaRatio;
    float         fMinBlobDist;
    ULONG         nMinRepeatability;
    float         fMinThreshold;
    float         fMaxThreshold;
    float         fThresholdStep;
};

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	float	25	Min estimated blob area in pixel
fMaxArea	float	15000	Max estimated blob area in pixel
fMinCircularity	float	0	Min circularity (1.0: ideal circle, < 1: less circular, 0: not circular at all)
fMaxCircularity	float	1	Max circularity (1.0: ideal circle, < 1: less circular, 0: not circular at all)
nBlobColor	unsigned char	255	0 or 255
fMinConvexity	float	0	Min convexity (1.0: blob fully convex, < 1: less convex)
fMaxConvexity	float	1	Max convexity (1.0: blob fully convex, < 1: less convex)
fMinInertiaRatio	float	0	Min inertia ratio (0.0 .. 1.0)
fMaxInertiaRatio	float	1	Max inertia ratio (0.0 .. 1.0)
fMinBlobDist	float	5	Min distance between different blobs
nMinRepeatability	ULONG	2	Min number of same detected blobs (dist < fMinBlobDist) in different thresholds
fMinThreshold	float	30	Min threshold (start)
fMaxThreshold	float	225	Max threshold (stop)
fThresholdStep	float	10	Threshold step between min and max threshold