CogCNLSearchRunParams.EdgeThresholdLow Property

CogCNLSearchRunParams EdgeThresholdLow Property

Cognex VisionPro

Edges with strengths below the low threshold are excluded from the run-time edge map. Edges with strengths between low & high (inclusive) are included if 8-connected to an edge already belonging to the edge map. Only applies to NonLinear CNLPAS.

Namespace: Cognex.VisionPro.CNLSearch
Assembly: Cognex.VisionPro.CNLSearch (in Cognex.VisionPro.CNLSearch.dll) Version: 65.1.0.0

Syntax

C++

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public int EdgeThresholdLow { get; set; }

public int EdgeThresholdLow { get; set; }

Public Property EdgeThresholdLow As Integer 
	Get 
	Set

Public Property EdgeThresholdLow As Integer 
	Get 
	Set

public:
property int EdgeThresholdLow {
	int get ();
	void set (int value);
}

public:
property int EdgeThresholdLow {
	int get ();
	void set (int value);
}

Property Value

Type: Int32

Events

Event Type	Reason
CogCNLSearchRunParams Changed	Fires when the low threshold is changed. The following state flag may be affected: SfEdgeThresholdLow
CogCNLSearchRunParams Changed	Fires when both the low and high thresholds are changed. The following state flags may be affected: SfEdgeThresholdLow SfEdgeThresholdHigh

Event Type

Reason

CogCNLSearchRunParams Changed

Fires when the low threshold is changed.

The following state flag may be affected:

SfEdgeThresholdLow

CogCNLSearchRunParams Changed

Fires when both the low and high thresholds are changed.

The following state flags may be affected:

Exceptions

Exception	Condition
ArgumentException	The supplied value is less than 0 or greater than 255.

Remarks

All edges with strengths below the low threshold are excluded from the edge map generated from the run-time search image. Edges with strengths between the thresholds are included in the edge map if they are 8-connected (vertically, horizontally, or diagonally adjacent) to another edge with a strength above the threshold, either directly or through other edges with strengths between the thresholds. Only applies to Nonlinear CNLPAS.

The low threshold must be less than or equal to the high threshold; if this value is set above the high threshold, the high threshold is also set to the supplied value.

Default Value: 3.0