C# Class Emgu.CV.Capture

Inheritance: Emgu.Util.UnmanagedObject, IDuplexCapture, ICapture

Show file Open project: fajoy/RTSPExample Class Usage Examples

Public Methods

Method	Description
Capture ( ) : System	Create a capture using the default camera
Capture ( CvEnum captureType ) : System	Create a capture using the specific camera
Capture ( String fileName ) : System	Create a capture from file or a video stream
Capture ( int camIndex ) : System	Create a capture using the specific camera
DuplexQueryFrame ( ) : void	Query a frame duplexly over WCF
DuplexQuerySmallFrame ( ) : void	Query a small frame duplexly over WCF
GetCaptureProperty ( CvEnum index ) : double	Obtain the capture property
Grab ( ) : bool	Grab a frame
Pause ( ) : void	Pause the grab process if it is running.
QueryFrame ( ) : Byte>.Image	Capture a Bgr image frame
QueryGrayFrame ( ) : Byte>.Image	Capture a Gray image frame
QuerySmallFrame ( ) : Byte>.Image	Capture a Bgr image frame that is half width and half height. Mainly used by WCF when sending image to remote locations in a bandwidth conservative scenario Internally, this is a cvQueryFrame operation follow by a cvPyrDown
RetrieveBgrFrame ( ) : Byte>.Image	Retrieve a Bgr image frame after Grab()
RetrieveBgrFrame ( int streamIdx ) : Byte>.Image	Retrieve a Bgr image frame after Grab()
RetrieveGrayFrame ( ) : Byte>.Image	Retrieve a Gray image frame after Grab()
RetrieveGrayFrame ( int streamIdx ) : Byte>.Image	Retrieve a Gray image frame after Grab()
SetCaptureProperty ( CvEnum property, double value ) : void	Sets the specified property of video capturing
Start ( ) : void	Start the grab process in a sperate thread. Once started, use the ImageGrabbed event handler and RetrieveGrayFrame/RetrieveBgrFrame to obtain the images.
Stop ( ) : void	Stop the grabbing thread
Wait ( ) : void	Wait for the grabbing thread to complete

Protected Methods

Method	Description
DisposeObject ( ) : void	Release the resource for this capture

Private Methods

Method	Description
Run ( ) : void

Method Details

Capture() public method

Create a capture using the default camera

public Capture ( ) : System
return	System

Capture() public method

Create a capture using the specific camera

public Capture ( CvEnum captureType ) : System
captureType	CvEnum	The capture type
return	System

Capture() public method

Create a capture from file or a video stream

public Capture ( String fileName ) : System
fileName	String	The name of a file, or an url pointed to a stream.
return	System

Capture() public method

Create a capture using the specific camera

public Capture ( int camIndex ) : System
camIndex	int	The index of the camera to create capture from, starting from 0
return	System

DisposeObject() protected method

Release the resource for this capture

protected DisposeObject ( ) : void
return	void

DuplexQueryFrame() public method

Query a frame duplexly over WCF

public DuplexQueryFrame ( ) : void
return	void

DuplexQuerySmallFrame() public method

Query a small frame duplexly over WCF

public DuplexQuerySmallFrame ( ) : void
return	void

GetCaptureProperty() public method

Obtain the capture property

public GetCaptureProperty ( CvEnum index ) : double
index	CvEnum	The index for the property
return	double

Grab() public method

Grab a frame

public Grab ( ) : bool
return	bool

Pause() public method

Pause the grab process if it is running.

public Pause ( ) : void
return	void

QueryFrame() public method

Capture a Bgr image frame

public QueryFrame ( ) : Byte>.Image
return	Byte>.Image

QueryGrayFrame() public method

Capture a Gray image frame

public QueryGrayFrame ( ) : Byte>.Image
return	Byte>.Image

QuerySmallFrame() public method

Capture a Bgr image frame that is half width and half height. Mainly used by WCF when sending image to remote locations in a bandwidth conservative scenario

Internally, this is a cvQueryFrame operation follow by a cvPyrDown

public QuerySmallFrame ( ) : Byte>.Image
return	Byte>.Image

RetrieveBgrFrame() public method

Retrieve a Bgr image frame after Grab()

public RetrieveBgrFrame ( ) : Byte>.Image
return	Byte>.Image

RetrieveBgrFrame() public method

Retrieve a Bgr image frame after Grab()

public RetrieveBgrFrame ( int streamIdx ) : Byte>.Image
streamIdx	int	Stream index
return	Byte>.Image

RetrieveGrayFrame() public method

Retrieve a Gray image frame after Grab()

public RetrieveGrayFrame ( ) : Byte>.Image
return	Byte>.Image

RetrieveGrayFrame() public method

Retrieve a Gray image frame after Grab()

public RetrieveGrayFrame ( int streamIdx ) : Byte>.Image
streamIdx	int	Stream index. Use 0 for default.
return	Byte>.Image

SetCaptureProperty() public method

Sets the specified property of video capturing

public SetCaptureProperty ( CvEnum property, double value ) : void
property	CvEnum	Property identifier
value	double	Value of the property
return	void

Start() public method

Start the grab process in a sperate thread. Once started, use the ImageGrabbed event handler and RetrieveGrayFrame/RetrieveBgrFrame to obtain the images.

public Start ( ) : void
return	void

Stop() public method

Stop the grabbing thread

public Stop ( ) : void
return	void

Wait() public method

Wait for the grabbing thread to complete

public Wait ( ) : void
return	void