CogSobelEdge.HysteresisThresholdLow Property

CogSobelEdge HysteresisThresholdLow Property

Cognex VisionPro

If PostProcessMode is cogSobelEdgePostProcessModeHysteresisThreshold, then hysteresis thresholding will be run on the Sobel magnitude image using this as the magnitude level below which edges are always discarded.

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

Syntax

C++

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public int HysteresisThresholdLow { get; set; }

public int HysteresisThresholdLow { get; set; }

Public Property HysteresisThresholdLow As Integer 
	Get 
	Set

Public Property HysteresisThresholdLow As Integer 
	Get 
	Set

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

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

Property Value

Type: Int32

Events

Event Type	Reason
CogSobelEdge Changed	Fires when the value of this property changes. The following state flag may be affected: SfHysteresisThresholdLow
CogSobelEdge Changed	Fires when the value of this property changes and HysteresisThresholdHigh changes as well. The following state flags may be affected: SfHysteresisThresholdLow SfHysteresisThresholdHigh

Event Type

Reason

CogSobelEdge Changed

Fires when the value of this property changes.

The following state flag may be affected:

SfHysteresisThresholdLow

CogSobelEdge Changed

Fires when the value of this property changes and HysteresisThresholdHigh changes as well.

The following state flags may be affected:

Exceptions

Exception	Condition
ArgumentException	The threshold was less than 0 or greater than 255.

Remarks

If PostProcessMode is HysteresisThreshold, then hysteresis thresholding will be run on the edge magnitude image using this as the magnitude level below which edges are always discarded.

This property is coupled to the HysteresisThresholdHigh property such that the HysteresisThresholdLow value will never be greater than the HysteresisThresholdHigh value. If HysteresisThresholdLow is set to a value that is greater than the current HysteresisThresholdHigh value, then HysteresisThresholdHigh will be increased to this new value automatically.

Default Value: 10