/// <summary>
/// Adapts a detector to partition the source image into a grid and detect points in each cell.
/// </summary>
/// <param name="detector">Detector that will be adapted</param>
/// <param name="maxTotalKeyPoints">Maximum count of keypoints detected on the image. Only the strongest keypoints</param>
/// <param name="gridRows">Grid rows count</param>
/// <param name="gridCols">Grid column count</param>
public GridAdaptedFeatureDetector(IKeyPointDetector detector, int maxTotalKeyPoints, int gridRows, int gridCols)
{
MaxTotalKeyPoints = maxTotalKeyPoints;
GridRows = gridRows;
GridCols = gridCols;
_ptr = GridAdaptedFeatureDetectorCreate(detector.FeatureDetectorPtr, maxTotalKeyPoints, gridRows, gridCols);
}
/// <summary>
/// Detect the keypoints from the image
/// </summary>
/// <param name="detector">The keypoint detector</param>
/// <param name="image">The image to extract keypoints from</param>
/// <param name="mask">The optional mask, can be null if not needed</param>
/// <returns>An array of key points</returns>
public static MKeyPoint[] DetectKeyPoints(this IKeyPointDetector detector, Image <Gray, Byte> image, Image <Gray, byte> mask)
{
using (VectorOfKeyPoint keypoints = detector.DetectKeyPointsRaw(image, mask))
{
return(keypoints.ToArray());
}
}
/// <summary>
/// Adapts a detector to partition the source image into a grid and detect points in each cell.
/// </summary>
/// <param name="detector">Detector that will be adapted</param>
/// <param name="maxTotalKeyPoints">Maximum count of keypoints detected on the image. Only the strongest keypoints</param>
/// <param name="gridRows">Grid rows count</param>
/// <param name="gridCols">Grid column count</param>
public GridAdaptedFeatureDetector(IKeyPointDetector detector, int maxTotalKeyPoints, int gridRows, int gridCols)
{
MaxTotalKeyPoints = maxTotalKeyPoints;
GridRows = gridRows;
GridCols = gridCols;
_ptr = CvInvoke.GridAdaptedFeatureDetectorCreate(detector.FeatureDetectorPtr, maxTotalKeyPoints, gridRows, gridCols);
}
/// <summary>
/// Detect the keypoints in the image
/// </summary>
/// <param name="detector">The keypoint detector</param>
/// <param name="image">The image from which the key point will be detected from</param>
/// <param name="mask">The optional mask, can be null if not needed</param>
/// <returns>The key pionts in the image</returns>
public static VectorOfKeyPoint DetectKeyPointsRaw(this IKeyPointDetector detector, Image <Gray, Byte> image, Image <Gray, Byte> mask)
{
VectorOfKeyPoint kpts = new VectorOfKeyPoint();
CvInvoke.CvFeatureDetectorDetectKeyPoints(detector.FeatureDetectorPtr, image, mask, kpts);
return(kpts);
}
