/// <summary>
/// Adds two 8-bit gray images.
/// <para>Source and destination image must have the size.</para>
/// </summary>
/// <param name="src">Source image.</param>
/// <param name="dst">Destination image.</param>
/// <param name="srcOffset">The point in source image.</param>
public static void AddTo(this Image<Gray<byte>> src, Image<Gray<byte>> dst, Point srcOffset)
{
Debug.Assert(src.Width == dst.Width && src.Height == dst.Height);
byte* srcRow = (byte*)src.GetData(srcOffset.Y);
byte* dstRow = (byte*)dst.ImageData;
if (src.Stride == src.Width && dst.Stride == dst.Width)
{
int numElemsToAdd = src.Width * src.Height - (srcOffset.Y * src.Width + srcOffset.X);
AddByteToByteVector(srcRow + srcOffset.X, dstRow, numElemsToAdd);
}
else
{
//first row
int nElemsToAddFirstRow = src.Width - srcOffset.X;
AddByteToByteVector(srcRow + srcOffset.X, dstRow, nElemsToAddFirstRow);
//other rows
srcRow += src.Stride;
dstRow += dst.Stride;
for (int r = srcOffset.Y + 1; r < src.Height; r++)
{
AddByteToByteVector(srcRow, dstRow, src.Width);
srcRow += src.Stride;
dstRow += dst.Stride;
}
}
}
/// <summary>
/// Maximum cross-correlation feature point matching algorithm.
/// </summary>
/// <param name="image1">First image.</param>
/// <param name="image2">Second image.</param>
/// <param name="points1">Points from the first image.</param>
/// <param name="points2">Points from the second image.</param>
/// <param name="windowSize">The size of the correlation window.</param>
/// <param name="maxDistance">The maximum distance to consider points as correlated.</param>
/// <returns>Matched point-pairs.</returns>
public static Point[][] Match(Gray<byte>[,] image1, Gray<byte>[,] image2, Point[] points1, Point[] points2, int windowSize, int maxDistance)
{
Point[][] matches = null;
using (var uImg1 = image1.Lock())
using(var uImg2 = image2.Lock())
{
var correlationMatching = new CorrelationMatching(windowSize, maxDistance, uImg1.AsBitmap(), uImg2.AsBitmap());
matches = correlationMatching.Match(points1.ToPoints(), points2.ToPoints()).ToPoints();
}
return matches;
}
