C# Класс OpenCvSharp.VideoCapture

Video capturing class

Наследование: OpenCvSharp.DisposableCvObject

Показать файл Открыть проект Примеры использования класса

Открытые методы

Метод	Описание
FromCamera ( CaptureDevice device ) : VideoCapture	Allocates and initialized the CvCapture structure for reading a video stream from the camera. Currently two camera interfaces can be used on Windows: Video for Windows (VFW) and Matrox Imaging Library (MIL); and two on Linux: V4L and FireWire (IEEE1394).
FromCamera ( CaptureDevice device, int index ) : VideoCapture	Allocates and initialized the CvCapture structure for reading a video stream from the camera. Currently two camera interfaces can be used on Windows: Video for Windows (VFW) and Matrox Imaging Library (MIL); and two on Linux: V4L and FireWire (IEEE1394).
FromCamera ( int index ) : VideoCapture	Allocates and initialized the CvCapture structure for reading a video stream from the camera. Currently two camera interfaces can be used on Windows: Video for Windows (VFW) and Matrox Imaging Library (MIL); and two on Linux: V4L and FireWire (IEEE1394).
FromFile ( string fileName ) : VideoCapture	Allocates and initialized the CvCapture structure for reading the video stream from the specified file. After the allocated structure is not used any more it should be released by cvReleaseCapture function.
Get ( CaptureProperty propertyId ) : double	Retrieves the specified property of camera or video file.
Get ( int propertyId ) : double	Retrieves the specified property of camera or video file.
Grab ( ) : bool	Grabs the frame from camera or file. The grabbed frame is stored internally. The purpose of this function is to grab frame fast that is important for syncronization in case of reading from several cameras simultaneously. The grabbed frames are not exposed because they may be stored in compressed format (as defined by camera/driver). To retrieve the grabbed frame, cvRetrieveFrame should be used.
IsOpened ( ) : bool	Returns true if video capturing has been initialized already.
Open ( CaptureDevice device ) : void	Allocates and initialized the CvCapture structure for reading a video stream from the camera. Currently two camera interfaces can be used on Windows: Video for Windows (VFW) and Matrox Imaging Library (MIL); and two on Linux: V4L and FireWire (IEEE1394).
Open ( CaptureDevice device, int index ) : void	Allocates and initialized the CvCapture structure for reading a video stream from the camera. Currently two camera interfaces can be used on Windows: Video for Windows (VFW) and Matrox Imaging Library (MIL); and two on Linux: V4L and FireWire (IEEE1394).
Open ( int index ) : void	Allocates and initialized the CvCapture structure for reading a video stream from the camera. Currently two camera interfaces can be used on Windows: Video for Windows (VFW) and Matrox Imaging Library (MIL); and two on Linux: V4L and FireWire (IEEE1394).
Open ( string fileName ) : void	Opens the specified video file
Read ( OpenCvSharp.Mat image ) : bool	Grabs a frame from camera or video file, decompresses and returns it. This function is just a combination of cvGrabFrame and cvRetrieveFrame in one call. The returned image should not be released or modified by user.
Release ( ) : void	Closes video file or capturing device.
Retrieve ( OpenCvSharp.Mat image, CameraChannels streamIdx = CameraChannels.OpenNI_DepthMap ) : bool	Returns the pointer to the image grabbed with cvGrabFrame function. The returned image should not be released or modified by user.
Retrieve ( OpenCvSharp.Mat image, int channel ) : bool	Decodes and returns the grabbed video frame.
RetrieveMat ( ) : OpenCvSharp.Mat	Decodes and returns the grabbed video frame.
Set ( CaptureProperty propertyId, double value ) : int	Sets the specified property of video capturing.
Set ( int propertyId, double value ) : int	Sets the specified property of video capturing.
VideoCapture ( ) : System	Initializes empty capture. To use this, you should call Open.
VideoCapture ( CaptureDevice device ) : System	Allocates and initialized the CvCapture structure for reading a video stream from the camera. Currently two camera interfaces can be used on Windows: Video for Windows (VFW) and Matrox Imaging Library (MIL); and two on Linux: V4L and FireWire (IEEE1394).
VideoCapture ( CaptureDevice device, int index ) : System	Allocates and initialized the CvCapture structure for reading a video stream from the camera. Currently two camera interfaces can be used on Windows: Video for Windows (VFW) and Matrox Imaging Library (MIL); and two on Linux: V4L and FireWire (IEEE1394).
VideoCapture ( int index ) : System	Allocates and initialized the CvCapture structure for reading a video stream from the camera. Currently two camera interfaces can be used on Windows: Video for Windows (VFW) and Matrox Imaging Library (MIL); and two on Linux: V4L and FireWire (IEEE1394).
VideoCapture ( string fileName ) : System	Allocates and initialized the CvCapture structure for reading the video stream from the specified file. After the allocated structure is not used any more it should be released by cvReleaseCapture function.

Защищенные методы

Метод	Описание
Dispose ( bool disposing ) : void	Clean up any resources being used.
VideoCapture ( IntPtr ptr ) : System	Initializes from native pointer

Описание методов

Dispose() защищенный Метод

Clean up any resources being used.

protected Dispose ( bool disposing ) : void
disposing	bool	/// If disposing equals true, the method has been called directly or indirectly by a user's code. Managed and unmanaged resources can be disposed. /// If false, the method has been called by the runtime from inside the finalizer and you should not reference other objects. Only unmanaged resources can be disposed. ///
Результат	void

FromCamera() публичный статический Метод

Allocates and initialized the CvCapture structure for reading a video stream from the camera. Currently two camera interfaces can be used on Windows: Video for Windows (VFW) and Matrox Imaging Library (MIL); and two on Linux: V4L and FireWire (IEEE1394).

public static FromCamera ( CaptureDevice device ) : VideoCapture
device	CaptureDevice	Device type
Результат	VideoCapture

FromCamera() публичный статический Метод

public static FromCamera ( CaptureDevice device, int index ) : VideoCapture
device	CaptureDevice	Device type
index	int	Index of the camera to be used. If there is only one camera or it does not matter what camera to use -1 may be passed.
Результат	VideoCapture

FromCamera() публичный статический Метод

public static FromCamera ( int index ) : VideoCapture
index	int	Index of the camera to be used. If there is only one camera or it does not matter what camera to use -1 may be passed.
Результат	VideoCapture

FromFile() публичный статический Метод

Allocates and initialized the CvCapture structure for reading the video stream from the specified file. After the allocated structure is not used any more it should be released by cvReleaseCapture function.

public static FromFile ( string fileName ) : VideoCapture
fileName	string	Name of the video file.
Результат	VideoCapture

Get() публичный Метод

Retrieves the specified property of camera or video file.

public Get ( CaptureProperty propertyId ) : double
propertyId	CaptureProperty	property identifier.
Результат	double

Get() публичный Метод

Retrieves the specified property of camera or video file.

public Get ( int propertyId ) : double
propertyId	int	property identifier.
Результат	double

Grab() публичный Метод

Grabs the frame from camera or file. The grabbed frame is stored internally. The purpose of this function is to grab frame fast that is important for syncronization in case of reading from several cameras simultaneously. The grabbed frames are not exposed because they may be stored in compressed format (as defined by camera/driver). To retrieve the grabbed frame, cvRetrieveFrame should be used.

public Grab ( ) : bool
Результат	bool

IsOpened() публичный Метод

Returns true if video capturing has been initialized already.

public IsOpened ( ) : bool
Результат	bool

Open() публичный Метод

public Open ( CaptureDevice device ) : void
device	CaptureDevice	Device type
Результат	void

Open() публичный Метод

public Open ( CaptureDevice device, int index ) : void
device	CaptureDevice	Device type
index	int	Index of the camera to be used. If there is only one camera or it does not matter what camera to use -1 may be passed.
Результат	void

Open() публичный Метод

public Open ( int index ) : void
index	int	Index of the camera to be used. If there is only one camera or it does not matter what camera to use -1 may be passed.
Результат	void

Open() публичный Метод

Opens the specified video file

public Open ( string fileName ) : void
fileName	string
Результат	void

Read() публичный Метод

Grabs a frame from camera or video file, decompresses and returns it. This function is just a combination of cvGrabFrame and cvRetrieveFrame in one call. The returned image should not be released or modified by user.

public Read ( OpenCvSharp.Mat image ) : bool
image	OpenCvSharp.Mat
Результат	bool

Release() публичный Метод

Closes video file or capturing device.

public Release ( ) : void
Результат	void

Retrieve() публичный Метод

Returns the pointer to the image grabbed with cvGrabFrame function. The returned image should not be released or modified by user.

public Retrieve ( OpenCvSharp.Mat image, CameraChannels streamIdx = CameraChannels.OpenNI_DepthMap ) : bool
image	OpenCvSharp.Mat
streamIdx	CameraChannels	non-zero streamIdx is only valid for multi-head camera live streams
Результат	bool

Retrieve() публичный Метод

Decodes and returns the grabbed video frame.

public Retrieve ( OpenCvSharp.Mat image, int channel ) : bool
image	OpenCvSharp.Mat
channel	int	non-zero streamIdx is only valid for multi-head camera live streams
Результат	bool

RetrieveMat() публичный Метод

Decodes and returns the grabbed video frame.

public RetrieveMat ( ) : OpenCvSharp.Mat
Результат	OpenCvSharp.Mat

Set() публичный Метод

Sets the specified property of video capturing.

public Set ( CaptureProperty propertyId, double value ) : int
propertyId	CaptureProperty	property identifier.
value	double	value of the property.
Результат	int

Set() публичный Метод

Sets the specified property of video capturing.

public Set ( int propertyId, double value ) : int
propertyId	int	property identifier.
value	double	value of the property.
Результат	int

VideoCapture() публичный Метод

Initializes empty capture. To use this, you should call Open.

public VideoCapture ( ) : System
Результат	System

VideoCapture() публичный Метод

public VideoCapture ( CaptureDevice device ) : System
device	CaptureDevice	Device type
Результат	System

VideoCapture() публичный Метод

public VideoCapture ( CaptureDevice device, int index ) : System
device	CaptureDevice	Device type
index	int	Index of the camera to be used. If there is only one camera or it does not matter what camera to use -1 may be passed.
Результат	System

VideoCapture() защищенный Метод

Initializes from native pointer

protected VideoCapture ( IntPtr ptr ) : System
ptr	IntPtr	CvCapture*
Результат	System

VideoCapture() публичный Метод

public VideoCapture ( int index ) : System
index	int	Index of the camera to be used. If there is only one camera or it does not matter what camera to use -1 may be passed.
Результат	System

VideoCapture() публичный Метод

public VideoCapture ( string fileName ) : System
fileName	string	Name of the video file.
Результат	System