VideoCapture Class |
Capture images from either camera or video file.
Inheritance HierarchyNamespace: Emgu.CV
Assembly: Emgu.CV.World (in Emgu.CV.World.dll) Version: 4.0.1.3373 (4.0.1.3373)
SyntaxThe VideoCapture type exposes the following members.
Constructors| Name | Description | |
|---|---|---|
 | VideoCapture(Int32, VideoCaptureAPI) | Create a capture using the specific camera |
| VideoCapture(String, VideoCaptureAPI) |
Create a capture from file or a video stream
|
Properties| Name | Description | |
|---|---|---|
 | BackendName |
The Capture Backend
|
| CaptureSource |
Get the type of the capture module
|
| FlipHorizontal |
Get or Set if the captured image should be flipped horizontally
|
| FlipType |
Get and set the flip type
|
| FlipVertical |
Get or Set if the captured image should be flipped vertically
|
| Height | The height of this capture |
| IsOpened |
True if the camera is opened
|
| Ptr |
Pointer to the unmanaged object
(Inherited from UnmanagedObject.) |
| Width | The width of this capture |
Methods| Name | Description | |
|---|---|---|
| Dispose |
The dispose function that implements IDisposable interface
(Inherited from DisposableObject.) |
 | DisposeObject |
Release the resource for this capture
(Overrides DisposableObjectDisposeObject.) |
| DuplexQueryFrame |
Query a frame duplexly over WCF
|
| DuplexQuerySmallFrame |
Query a small frame duplexly over WCF
|
| Equals | (Inherited from Object.) |
| Finalize |
Destructor
(Inherited from DisposableObject.) |
| GetCaptureProperty |
Obtain the capture property
|
| GetHashCode | Serves as a hash function for a particular type. (Inherited from Object.) |
| GetType | Gets the type of the current instance. (Inherited from Object.) |
| Grab |
Grab a frame
|
| MemberwiseClone | Creates a shallow copy of the current Object. (Inherited from Object.) |
| Pause |
Pause the grab process if it is running.
|
| QueryFrame |
Capture a Bgr image frame
|
| QuerySmallFrame |
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
|
| Read |
Similar to the C++ implementation of cv::Capture >> Mat. It first call Grab() function follows by Retrieve()
|
| ReleaseManagedResources |
Release the managed resources. This function will be called during the disposal of the current object.
override ride this function if you need to call the Dispose() function on any managed IDisposable object created by the current object
(Inherited from DisposableObject.) |
| Retrieve |
Retrieve a Gray image frame after Grab()
|
| SetCaptureProperty |
Sets the specified property of video capturing
|
| Start |
Start the grab process in a separate thread. Once started, use the ImageGrabbed event handler and RetrieveGrayFrame/RetrieveBgrFrame to obtain the images.
|
| Stop |
Stop the grabbing thread
|
| ToString | Returns a string that represents the current object. (Inherited from Object.) |
Events| Name | Description | |
|---|---|---|
 | ImageGrabbed |
The event to be called when an image is grabbed
|
Fields| Name | Description | |
|---|---|---|
 | _ptr |
A pointer to the unmanaged object
(Inherited from UnmanagedObject.) |
RemarksVideoCapture class is NOT implemented in Open CV for Android, iOS or UWP platforms
See Also