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Attempts to determine whether the input image is a view of the chessboard pattern and locate internal chessboard corners

Namespace: Emgu.CV
Assembly: Emgu.CV (in Emgu.CV.dll) Version: 2.4.0.1717 (2.4.0.1717)

Syntax

C#
public static int cvFindChessboardCorners(
	IntPtr image,
	Size patternSize,
	IntPtr corners,
	ref int cornerCount,
	CALIB_CB_TYPE flags
)
Visual Basic
Public Shared Function cvFindChessboardCorners ( _
	image As IntPtr, _
	patternSize As Size, _
	corners As IntPtr, _
	ByRef cornerCount As Integer, _
	flags As CALIB_CB_TYPE _
) As Integer
Visual C++
public:
static int cvFindChessboardCorners(
	IntPtr image, 
	Size patternSize, 
	IntPtr corners, 
	int% cornerCount, 
	CALIB_CB_TYPE flags
)

Parameters

image
Type: System..::..IntPtr
Source chessboard view; it must be 8-bit grayscale or color image
patternSize
Type: System.Drawing..::..Size
The number of inner corners per chessboard row and column
corners
Type: System..::..IntPtr
Pointer to the output array of corners(PointF) detected
cornerCount
Type: System..::..Int32%
The output corner counter. If it is not IntPtr.Zero, the function stores there the number of corners found
flags
Type: Emgu.CV.CvEnum..::..CALIB_CB_TYPE
Various operation flags

Return Value

Non-zero value if all the corners have been found and they have been placed in a certain order (row by row, left to right in every row), otherwise, if the function fails to find all the corners or reorder them, it returns 0

Remarks

The coordinates detected are approximate, and to determine their position more accurately, the user may use the function cvFindCornerSubPix

See Also