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GridMotionAreaProcessing Class

Motion processing algorithm, which performs grid processing of motion frame.
Inheritance Hierarchy
SystemObject
  Accord.Vision.MotionGridMotionAreaProcessing

Namespace:  Accord.Vision.Motion
Assembly:  Accord.Vision (in Accord.Vision.dll) Version: 3.8.0
Syntax
public class GridMotionAreaProcessing : IMotionProcessing
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The GridMotionAreaProcessing type exposes the following members.

Constructors
  NameDescription
Public methodGridMotionAreaProcessing
Initializes a new instance of the GridMotionAreaProcessing class.
Public methodGridMotionAreaProcessing(Int32, Int32)
Initializes a new instance of the GridMotionAreaProcessing class.
Public methodGridMotionAreaProcessing(Int32, Int32, Boolean)
Initializes a new instance of the GridMotionAreaProcessing class.
Public methodGridMotionAreaProcessing(Int32, Int32, Boolean, Single)
Initializes a new instance of the GridMotionAreaProcessing class.
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Properties
  NameDescription
Public propertyGridHeight
Height of motion grid, [2, 64].
Public propertyGridWidth
Width of motion grid, [2, 64].
Public propertyHighlightColor
Color used to highlight motion regions.
Public propertyHighlightMotionGrid
Highlight motion regions or not.
Public propertyMotionAmountToHighlight
Motion amount to highlight cell.
Public propertyMotionGrid
Motion levels of each grid's cell.
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Methods
  NameDescription
Public methodEquals
Determines whether the specified object is equal to the current object.
(Inherited from Object.)
Protected methodFinalize
Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection.
(Inherited from Object.)
Public methodGetHashCode
Serves as the default hash function.
(Inherited from Object.)
Public methodGetType
Gets the Type of the current instance.
(Inherited from Object.)
Protected methodMemberwiseClone
Creates a shallow copy of the current Object.
(Inherited from Object.)
Public methodProcessFrame
Process video and motion frames doing further post processing after performed motion detection.
Public methodReset
Reset internal state of motion processing algorithm.
Public methodToString
Returns a string that represents the current object.
(Inherited from Object.)
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Extension Methods
  NameDescription
Public Extension MethodHasMethod
Checks whether an object implements a method with the given name.
(Defined by ExtensionMethods.)
Public Extension MethodIsEqual
Compares two objects for equality, performing an elementwise comparison if the elements are vectors or matrices.
(Defined by Matrix.)
Public Extension MethodTo(Type)Overloaded.
Converts an object into another type, irrespective of whether the conversion can be done at compile time or not. This can be used to convert generic types to numeric types during runtime.
(Defined by ExtensionMethods.)
Public Extension MethodToTOverloaded.
Converts an object into another type, irrespective of whether the conversion can be done at compile time or not. This can be used to convert generic types to numeric types during runtime.
(Defined by ExtensionMethods.)
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Remarks

The aim of this motion processing algorithm is to do grid processing of motion frame. This means that entire motion frame is divided by a grid into certain amount of cells and the motion level is calculated for each cell. The information about each cell's motion level may be retrieved using MotionGrid property.

In addition the algorithm can highlight those cells, which have motion level above the specified threshold (see MotionAmountToHighlight property). To enable this it is required to set HighlightMotionGrid property to .

Sample usage:

// create instance of motion detection algorithm
IMotionDetector motionDetector = new ... ;
// create instance of motion processing algorithm
GridMotionAreaProcessing motionProcessing = new GridMotionAreaProcessing( 16, 16 );
// create motion detector
MotionDetector detector = new MotionDetector( motionDetector, motionProcessing );

// continuously feed video frames to motion detector
while ( ... )
{
    // process new video frame
    detector.ProcessFrame( videoFrame );

    // check motion level in 5th row 8th column
    if ( motionProcessing.MotionGrid[5, 8] > 0.15 )
    {
        // ...
    }
}
See Also