List <IPoint2> GetFtPntList(Bitmap bitImg, float thread)
{
List <IPoint2> ipts1 = new List <IPoint2>();//图片1的特征点
//--------------------------------------------------
// Create Integral Image
IntegralImage iimg = IntegralImage.FromImage(bitImg);
// Extract the interest points
ipts1 = FastHessian.getIpoints(thread, //此值越小，特征点越多
5, 2, iimg);
// Describe the interest points
SurfDescriptor.DecribeInterestPoints(ipts1, false, //是否表示方向
false, //false为64，true为128
iimg);
iimg.Dispose();
iimg = null;
return(ipts1);
}
/// <summary>
/// Static one-call do it all function
/// </summary>
/// <param name="img"></param>
/// <param name="ipts"></param>
/// <param name="extended"></param>
/// <param name="upright"></param>
public static void DecribeInterestPoints(List <IPoint2> ipts, bool upright, bool extended, IntegralImage img)
{
SurfDescriptor des = new SurfDescriptor();
des.DescribeInterestPoints(ipts, upright, extended, img);
}