CogBlobSegmentationParams.HardRelativeThreshold Property

CogBlobSegmentationParams HardRelativeThreshold Property

Cognex VisionPro

A fixed threshold is computed by determining the pixel value which lies at the specified percentage of the distance between the low tail pixel value and the high tail pixel value. This computed threshold is then used to perform Hard-Fixed segmentation.

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

Syntax

C++

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public int HardRelativeThreshold { get; set; }

public int HardRelativeThreshold { get; set; }

Public Property HardRelativeThreshold As Integer 
	Get 
	Set

Public Property HardRelativeThreshold As Integer 
	Get 
	Set

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

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

Property Value

Type: Int32
The default is 50.

Events

Event Type	Reason
[Cognex.VisionPro.ICogChangedEvent.Changed]	Fires when the value of this property changes. The following state flag may be affected: SfHardRelativeThreshold

Event Type

Reason

[Cognex.VisionPro.ICogChangedEvent.Changed]

Fires when the value of this property changes.

The following state flag may be affected:

SfHardRelativeThreshold

Exceptions

Exception	Condition
[System.ArgumentException]	The supplied value is less than 0 or greater than 100.

Remarks

A hard fixed threshold is computed by determining the pixel value which lies at the specified percentage of the distance between the low tail pixel value and the high tail pixel value. This computed threshold is then used to perform Hard-Fixed segmentation.

If Polarity specifies light blobs, then pixels values that are greater than or equal to this computed threshold are part of the blob(s); pixel values that are less than this threshold are part of the background. If Polarity specifies dark blobs, then the ranges are inverted.