/// <summary>
/// Compute the BRISK features and descriptors on an image
/// </summary>
/// <param name="image"></param>
/// <param name="mask"></param>
/// <param name="keyPoints"></param>
/// <param name="descriptors"></param>
/// <param name="useProvidedKeypoints"></param>
public void Run(InputArray image, InputArray mask, out KeyPoint[] keyPoints,
out float[] descriptors, bool useProvidedKeypoints = false)
{
MatOfFloat descriptorsMat = new MatOfFloat();
Run(image, mask, out keyPoints, descriptorsMat, useProvidedKeypoints);
descriptors = descriptorsMat.ToArray();
}
/// <summary>
/// keypoint を検出し，その SIFT ディスクリプタを計算します．
/// </summary>
/// <param name="img">Input 8-bit grayscale image</param>
/// <param name="mask">Optional input mask that marks the regions where we should detect features.</param>
/// <param name="keypoints">The input/output vector of keypoints</param>
/// <param name="descriptors">The output matrix of descriptors. </param>
/// <param name="useProvidedKeypoints">Boolean flag. If it is true, the keypoint detector is not run.
/// Instead, the provided vector of keypoints is used and the algorithm just computes their descriptors.</param>
#else
/// <summary>
/// detects keypoints and computes the SIFT descriptors for them.
/// </summary>
/// <param name="img">Input 8-bit grayscale image</param>
/// <param name="mask">Optional input mask that marks the regions where we should detect features.</param>
/// <param name="keypoints">The input/output vector of keypoints</param>
/// <param name="descriptors">The output matrix of descriptors. </param>
/// <param name="useProvidedKeypoints">Boolean flag. If it is true, the keypoint detector is not run.
/// Instead, the provided vector of keypoints is used and the algorithm just computes their descriptors.</param>
#endif
public void Run(InputArray img, InputArray mask, out KeyPoint[] keypoints, out float[] descriptors,
bool useProvidedKeypoints = false)
{
// SIFTは std::vector<float> でdescriptorを受け取れないっぽいので、自前実装
MatOfFloat descriptorsMat = new MatOfFloat();
Run(img, mask, out keypoints, descriptorsMat, useProvidedKeypoints);
descriptors = descriptorsMat.ToArray();
}