CvInvokeSelectROI Method |
Selects ROI on the given image. Function creates a window and allows user to select a ROI using mouse. Controls: use space or enter to finish selection, use key c to cancel selection (function will return the zero cv::Rect).
Namespace: Emgu.CV
Assembly: Emgu.CV.World (in Emgu.CV.World.dll) Version: 4.1.1.3497 (4.1.1.3497)
Syntaxpublic static Rectangle SelectROI( string windowName, IInputArray img, bool showCrosshair = true, bool fromCenter = false )
Public Shared Function SelectROI ( windowName As String, img As IInputArray, Optional showCrosshair As Boolean = true, Optional fromCenter As Boolean = false ) As Rectangle
public: static Rectangle SelectROI( String^ windowName, IInputArray^ img, bool showCrosshair = true, bool fromCenter = false )
static member SelectROI : windowName : string * img : IInputArray * ?showCrosshair : bool * ?fromCenter : bool (* Defaults: let _showCrosshair = defaultArg showCrosshair true let _fromCenter = defaultArg fromCenter false *) -> Rectangle
Parameters
- windowName
- Type: SystemString
Name of the window where selection process will be shown. - img
- Type: Emgu.CVIInputArray
Image to select a ROI. - showCrosshair (Optional)
- Type: SystemBoolean
If true crosshair of selection rectangle will be shown. - fromCenter (Optional)
- Type: SystemBoolean
If true center of selection will match initial mouse position. In opposite case a corner of selection rectangle will correspont to the initial mouse position.
Return Value
Type: RectangleSelected ROI or empty rect if selection canceled.
See Also