CogSobelEdge.HysteresisThresholdHigh Property

CogSobelEdge HysteresisThresholdHigh Property

Cognex VisionPro 9.8

If PostProcessMode is cogSobelEdgePostProcessModeHysteresisThreshold, then hysteresis thresholding will be run on the Sobel magnitude image using this as the magnitude level at or above which edges are never discarded.

Namespace: Cognex.VisionPro.ImageProcessing
Assembly: Cognex.VisionPro.ImageProcessing (in Cognex.VisionPro.ImageProcessing.dll) Version: 75.1.0.0

Syntax

C++

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public int HysteresisThresholdHigh { get; set; }

public int HysteresisThresholdHigh { get; set; }

Public Property HysteresisThresholdHigh As Integer 
	Get 
	Set

Public Property HysteresisThresholdHigh As Integer 
	Get 
	Set

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

public:
property int HysteresisThresholdHigh {
	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: SfHysteresisThresholdHigh
CogSobelEdge Changed	Fires when the value of this property changes and HysteresisThresholdLow 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:

SfHysteresisThresholdHigh

CogSobelEdge Changed

Fires when the value of this property changes and HysteresisThresholdLow 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 at or above which edges are never discarded.

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

Default Value: 20