Cog3DRobustFitParameters ClassCognex VisionPro
This class provides parameters that specify the behavior of robust fitters.
Inheritance Hierarchy

System Object
  System MarshalByRefObject
    Cognex.VisionPro.Implementation CogObjectBase
      Cognex.VisionPro.Implementation CogSerializableObjectBase
        Cognex.VisionPro.Implementation CogSerializableChangedEventBase
          Cognex.VisionPro3D Cog3DRobustFitParameters

Namespace: Cognex.VisionPro3D
Assembly: Cognex.VisionPro3D (in Cognex.VisionPro3D.dll) Version: 65.1.0.0
Syntax

[SerializableAttribute]
public class Cog3DRobustFitParameters : CogSerializableChangedEventBase, 
	IDisposable

The Cog3DRobustFitParameters type exposes the following members.

Constructors

  NameDescription
Public methodCog3DRobustFitParameters 
Default constructor. Default values are:
Public methodCog3DRobustFitParameters(Cog3DRobustFitParameters)
Protected methodCog3DRobustFitParameters(SerializationInfo, StreamingContext)
Serialization constructor for Cog3DRobustFitParameters object.
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Methods

  NameDescription
Public methodCreateObjRef
Creates an object that contains all the relevant information required to generate a proxy used to communicate with a remote object.
(Inherited from MarshalByRefObject.)
Public methodDispose 
Protected methodDispose(Boolean)
Public methodEquals
Determines whether the specified Object is equal to the current Object.
(Inherited from Object.)
Protected methodFinalize (Overrides Object Finalize .)
Protected methodGetAttributes
Implements the corresponding member of the ICustomTypeDescriptor interface. May be overridden in derived classes to provide custom type information.
(Inherited from CogObjectBase.)
Protected methodGetClassName
Implements the corresponding member of the ICustomTypeDescriptor interface. May be overridden in derived classes to provide custom type information.
(Inherited from CogObjectBase.)
Protected methodGetComponentName
Implements the corresponding member of the ICustomTypeDescriptor interface. May be overridden in derived classes to provide custom type information.
(Inherited from CogObjectBase.)
Protected methodGetConverter
Implements the corresponding member of the ICustomTypeDescriptor interface. May be overridden in derived classes to provide custom type information.
(Inherited from CogObjectBase.)
Protected methodGetDefaultEvent
Implements the corresponding member of the ICustomTypeDescriptor interface. May be overridden in derived classes to provide custom type information.
(Inherited from CogObjectBase.)
Protected methodGetDefaultProperty
Implements the corresponding member of the ICustomTypeDescriptor interface. May be overridden in derived classes to provide custom type information.
(Inherited from CogObjectBase.)
Protected methodGetEditor
Implements the corresponding member of the ICustomTypeDescriptor interface. May be overridden in derived classes to provide custom type information.
(Inherited from CogObjectBase.)
Protected methodGetEvents 
Implements the corresponding member of the ICustomTypeDescriptor interface. May be overridden in derived classes to provide custom type information.
(Inherited from CogObjectBase.)
Protected methodGetEvents( Attribute )
Implements the corresponding member of the ICustomTypeDescriptor interface. May be overridden in derived classes to provide custom type information.
(Inherited from CogObjectBase.)
Public methodGetHashCode
Serves as a hash function for a particular type.
(Inherited from Object.)
Public methodGetLifetimeService
Retrieves the current lifetime service object that controls the lifetime policy for this instance.
(Inherited from MarshalByRefObject.)
Protected methodGetObjectData
Populates the provided SerializationInfo with the data needed to serialize the object.
(Overrides CogSerializableObjectBase GetObjectData(SerializationInfo, StreamingContext).)
Protected methodGetProperties 
Implements the corresponding member of the ICustomTypeDescriptor interface. May be overridden in derived classes to provide custom type information.
(Inherited from CogObjectBase.)
Protected methodGetProperties( Attribute )
Implements the corresponding member of the ICustomTypeDescriptor interface. May be overridden in derived classes to provide custom type information.
(Inherited from CogObjectBase.)
Protected methodGetPropertyOwner
Implements the corresponding member of the ICustomTypeDescriptor interface. May be overridden in derived classes to provide custom type information.
(Inherited from CogObjectBase.)
Public methodGetType
Gets the Type of the current instance.
(Inherited from Object.)
Public methodInitializeLifetimeService
Obtains a lifetime service object to control the lifetime policy for this instance.
(Inherited from MarshalByRefObject.)
Protected methodMemberwiseClone 
Creates a shallow copy of the current Object.
(Inherited from Object.)
Protected methodMemberwiseClone(Boolean)
Creates a shallow copy of the current MarshalByRefObject object.
(Inherited from MarshalByRefObject.)
Protected methodOnChanged(Int64)
This method should be called internally whenever the object's state may have changed.
(Inherited from CogSerializableChangedEventBase.)
Protected methodOnChanged(CogChangedEventArgs)
This method may be called internally whenever a derived object's state may have changed and the derived object expresses this change via a derived CogChangedEventArgs class.
(Inherited from CogSerializableChangedEventBase.)
Public methodStatic memberRealEqual
Public methodResumeAndRaiseChangedEvent
Re-enables raising of the Changed event after SuspendChangedEvent has been called, and raises the Changed event if the ChangedEventSuspended count is reduced to zero and any changes were made while events were suspended. Must be called once for each call to SuspendChangedEvent.
(Inherited from CogSerializableChangedEventBase.)
Public methodSuspendChangedEvent
Temporarily suspends the raising of the Changed event. May be called more than once, and a corresponding call to ResumeAndRaiseChangedEvent must be made for each call to SuspendChangedEvent.
(Inherited from CogSerializableChangedEventBase.)
Public methodToString (Overrides Object ToString .)
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Fields

  NameDescription
Public fieldStatic memberSfAssurance
This bit will be set in the EventArgs of a Changed event every time the value returned by Assurance may have cahnged.
Public fieldStatic memberSfDistanceThreshold
This bit will be set in the EventArgs of a Changed event every time the value returned by DistanceThreshold may have cahnged.
Protected fieldStatic memberSfNextSf
Public fieldStatic memberSfRobustFitTechnique
This bit will be set in the EventArgs of a Changed event every time the value returned by RobustFitTechnique may have cahnged.
Public fieldStatic memberSfWorstCaseProportionOutliers
This bit will be set in the EventArgs of a Changed event every time the value returned by WorstCaseProportionOutliers may have cahnged.
Public fieldStatic memberSfWorstCaseProportionOutliersMode
This bit will be set in the EventArgs of a Changed event every time the value returned by WorstCaseProportionOutliersMode may have cahnged.
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Properties

  NameDescription
Public propertyAssurance
Get or set the assurance.
Public propertyChangedEventSuspended
If nonzero, indicates that the raising of the Changed event has been suspended. This value is incremented when SuspendChangedEvent is called and decremented when ResumeAndRaiseChangedEvent is called.
(Inherited from CogSerializableChangedEventBase.)
Public propertyDistanceThreshold
Get or set the distance threshold.
Public propertyHasChanged (Inherited from CogSerializableChangedEventBase.)
Public propertyRobustFitTechnique
Get or set the fit technique.
Public propertyStateFlags
Returns the complete set of state flags supported on this object. The flags may be indexed by name as shown in the following C# code snippet: if (changedObject.StateFlags["Color"] & eventArgs.StateFlags) { ... }
(Inherited from CogSerializableChangedEventBase.)
Public propertyWorstCaseProportionOutliers
Get or set the worst case proportion outliers.
Public propertyWorstCaseProportionOutliersMode
Get or set the worst case proportion outliers mode.
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Events

  NameDescription
Public eventChanged
This event is raised when one or more parts of the object's state may have changed.
(Inherited from CogSerializableChangedEventBase.)
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Remarks

Classical techniques for parameter estimation, such as least squares, optimize (according to a specified objective function) the fit of a functional description (model) to all of the presented data. These techniques have no internal mechanisms for detecting and rejecting gross errors in the data. They are averaging techniques that rely on the assumption (the smoothing assumption) that regardless of the size of the data set, there will always be enough good values to smooth out any gross deviations.

In many practical parameter estimation problems the smoothing assumption does not hold; i.e., the data contain uncompensated gross errors. To deal with this situation, several heuristics have been proposed. The technique usually employed is some variation of first using all the data to derive the model parameters, then locating the datum that is farthest from agreement with the instantiated model, assuming that it is a gross error, deleting it, and iterating this process until either the maximum deviation is less then some preset threshold or until there is no longer sufficient data to proceed. It can easily be shown that a single gross error ("poisoned point"), mixed in with a set of good data, can cause the above heuristic to fail. Robust fitters use techniques that get around this shortcoming.

See the theory topic for a discussion of the adaptive RANSAC fitting technique.

See Also