private int[] KeypointsSizes(int size)
{
var ret = new nuint[size];
NativeMethods.vector_ImageFeatures_getKeypointsSize(ptr, ret);
GC.KeepAlive(this);
return(ret.Select(v => (int)v).ToArray());
}
/// <summary>
/// vector.size()
/// </summary>
public IReadOnlyList <long> GetSize2()
{
var size1 = GetSize1();
var size2 = new nuint[size1];
NativeMethods.vector_vector_Point_getSize2(ptr, size2);
GC.KeepAlive(this);
return(size2.Select(s => (long)s).ToArray());
}