LineMaxEdgeDetectionParams.ContrastThreshold Property

LineMaxEdgeDetectionParams ContrastThreshold Property

Cognex VisionPro 9.21 SR1

Get

Gets the minimum contrast constraint. Edge points are not created for gradients with a contrast below this value.

Set

Sets the minimum contrast constraint. Edge points are not created for gradients with a contrast below this value.

Namespace: Cognex.Vision.LineMax
Assembly: Cognex.Vision.LineMax.Net (in Cognex.Vision.LineMax.Net.dll) Version: 9.21.1.1

Syntax

C++

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public double ContrastThreshold { get; set; }

public double ContrastThreshold { get; set; }

Public Property ContrastThreshold As Double 
	Get 
	Set

Public Property ContrastThreshold As Double 
	Get 
	Set

public:
property double ContrastThreshold {
	double get ();
	void set (double value);
}

public:
property double ContrastThreshold {
	double get ();
	void set (double value);
}

Return Value

Type: Double

The absolute contrast in the range 0.0 to 65535.0, inclusive. The default is 5.

Exceptions

Exception	Condition
ArgumentOutOfRangeException	Thrown if set to a value less than 0.

Remarks

Unlike normalized contrast, which is a measure of relative intensity difference, contrast is a measure of absolute intensity difference. See NormalizedContrastThreshold for information on applying a constraint on the normalized contrast measurement. The contrast measurement is computed using: sqrt(GradientX2 + GradientY2) at an edge point.

Remarks

Changed Raised when the value of this property changes. The following state flag may be affected:

SfContrastThreshold