/// <summary>
/// Computes the descriptor as the maximums of an array of filter responses.
/// </summary>
/// <param name="samples">Samples to compute the filter bank response for</param>
/// <param name="pyramid">Pyramid to use when computing responses</param>
/// <returns>Filter bank descriptor</returns>
public override List <Keypoint> Compute <T>(List <ScaleSpaceSample> samples, ScaleSpacePyramid <T> pyramid)
{
List <Keypoint> points = base.Compute <T>(samples, pyramid);
foreach (var point in points)
{
point.Descriptor = maximumResponse(point.Descriptor);
}
return(points);
}
/// <summary>
/// Computes the descriptor as an array of filter responses.
/// </summary>
/// <param name="samples">Samples to compute the filter bank response for</param>
/// <param name="pyramid">Pyramid to use when computing responses</param>
/// <returns>Filter bank descriptor</returns>
public virtual List <Keypoint> Compute <T>(List <ScaleSpaceSample> samples, ScaleSpacePyramid <T> pyramid) where T : IMultichannelImage <float>, new()
{
List <Keypoint> points = new List <Keypoint>();
foreach (ScaleSpaceSample sample in samples)
{
float[] desc = new float[_filters.Count];
for (int i = 0; i < desc.Length; i++)
{
desc[i] = _filters[i].Compute <T>(sample, pyramid);
}
Keypoint point = new Keypoint(sample.X, sample.Y, sample.ImageScale, pyramid.ComputeSigma(sample.Octave, sample.Level), 0);
point.Descriptor = desc;
points.Add(point);
}
return(points);
}
/// <summary>
/// Computes filter by multiplying the filter values against the patch values. If the patch or filter
/// sizes do not match up, the two will be centered on each other and computation done on overlapping
/// indices.
/// </summary>
/// <param name="sample">Sample to compute</param>
/// <param name="pyramid">Pyramid to use for computation</param>
/// <returns>Filter response for the desired sample</returns>
public unsafe float Compute <T>(ScaleSpaceSample sample, ScaleSpacePyramid <T> pyramid) where T : IMultichannelImage <float>, new()
{
return(compute(sample.Row, sample.Column, pyramid[sample.Octave, sample.Level]));
}