/// <summary>
/// Extracts a diagonal from a matrix
/// </summary>
/// <param name="d">d index of the diagonal, with the following values:
/// - d=0 is the main diagonal.
/// - d<0 is a diagonal from the lower half. For example, d=-1 means the diagonal is set immediately below the main one.
/// - d>0 is a diagonal from the upper half. For example, d=1 means the diagonal is set immediately above the main one.</param>
/// <returns></returns>
public MatExpr Diag(MatDiagType d = MatDiagType.Main)
{
ThrowIfDisposed();
NativeMethods.HandleException(
NativeMethods.core_MatExpr_diag(ptr, (int)d, out var ret));
GC.KeepAlive(this);
var retVal = new MatExpr(ret);
return(retVal);
}
/// <summary>
///
/// </summary>
/// <param name="d"></param>
/// <returns></returns>
public Mat Diag(MatDiagType d)
{
ThrowIfDisposed();
try
{
IntPtr retPtr = CppInvoke.core_Mat_diag(ptr, (int)d);
Mat retVal = new Mat(retPtr);
return retVal;
}
catch (BadImageFormatException ex)
{
throw PInvokeHelper.CreateException(ex);
}
}
