Cv2SelectROI Method (InputArray, Boolean, Boolean)

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: OpenCvSharp
Assembly: OpenCvSharp (in OpenCvSharp.dll) Version: 1.0.0

Syntax

C++

Copy

public static Rect SelectROI(
	InputArray img,
	bool showCrosshair = true,
	bool fromCenter = false
)

Public Shared Function SelectROI ( 
	img As InputArray,
	Optional showCrosshair As Boolean = true,
	Optional fromCenter As Boolean = false
) As Rect

public:
static Rect SelectROI(
	InputArray^ img, 
	bool showCrosshair = true, 
	bool fromCenter = false
)

static member SelectROI : 
        img : InputArray * 
        ?showCrosshair : bool * 
        ?fromCenter : bool 
(* Defaults:
        let _showCrosshair = defaultArg showCrosshair true
        let _fromCenter = defaultArg fromCenter false
*)
-> Rect

Parameters

img: Type: OpenCvSharpInputArray
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 correspond to the initial mouse position.

Return Value

Type: Rect
selected ROI or empty rect if selection canceled.

Reference

Cv2 Class

SelectROI Overload

OpenCvSharp Namespace

Cv2AddLanguageSpecificTextSet("LST2DA9910F_0?cpp=::|nu=.");SelectROI Method (InputArray, Boolean, Boolean)

Parameters

Return Value

Reference

Cv2SelectROI Method (InputArray, Boolean, Boolean)