/// <summary>
/// Finds the positions of internal corners of the chessboard.
/// </summary>
/// <param name="image">Source chessboard view. It must be an 8-bit grayscale or color image.</param>
/// <param name="patternSize">Number of inner corners per a chessboard row and column
/// ( patternSize = Size(points_per_row,points_per_colum) = Size(columns, rows) ).</param>
/// <param name="corners">Output array of detected corners.</param>
/// <param name="flags">Various operation flags that can be zero or a combination of the ChessboardFlag values</param>
/// <returns>The function returns true if all of the corners are found and they are 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 false.</returns>
public static bool FindChessboardCorners(
InputArray image,
Size patternSize,
out Point2f[] corners,
ChessboardFlags flags = ChessboardFlags.AdaptiveThresh | ChessboardFlags.NormalizeImage)
{
if (image == null)
throw new ArgumentNullException("image");
image.ThrowIfDisposed();
using (var cornersVec = new VectorOfPoint2f())
{
int ret = NativeMethods.calib3d_findChessboardCorners_vector(
image.CvPtr, patternSize, cornersVec.CvPtr, (int)flags);
corners = cornersVec.ToArray();
return ret != 0;
}
}
/// <summary>
/// Finds the positions of internal corners of the chessboard.
/// </summary>
/// <param name="image">Source chessboard view. It must be an 8-bit grayscale or color image.</param>
/// <param name="patternSize">Number of inner corners per a chessboard row and column
/// ( patternSize = Size(points_per_row,points_per_colum) = Size(columns, rows) ).</param>
/// <param name="corners">Output array of detected corners.</param>
/// <param name="flags">Various operation flags that can be zero or a combination of the ChessboardFlag values</param>
/// <returns>The function returns true if all of the corners are found and they are 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 false.</returns>
public static bool FindChessboardCorners(
InputArray image,
Size patternSize,
OutputArray corners,
ChessboardFlags flags = ChessboardFlags.AdaptiveThresh | ChessboardFlags.NormalizeImage)
{
if (image == null)
throw new ArgumentNullException("image");
if (corners == null)
throw new ArgumentNullException("corners");
image.ThrowIfDisposed();
corners.ThrowIfNotReady();
int ret = NativeMethods.calib3d_findChessboardCorners_InputArray(
image.CvPtr, patternSize, corners.CvPtr, (int)flags);
corners.Fix();
return ret != 0;
}
