Declaration
TIEVisionKeyPoint = packed record
pt: TIEVisionPoint2f; // coordinates of the keypoints
size: single; // diameter of the meaningful keypoint neighborhood
angle: single; // computed orientation of the keypoint (-1 if not applicable); it's in [0,360) degrees and measured relative to image coordinate system, ie in clockwise.
response: single; // the response by which the most strong keypoints have been selected. Can be used for the further sorting or subsampling
octave: int32_t; // octave (pyramid layer) from which the keypoint has been extracted
class_id: int32_t; // object class (if the keypoints need to be clustered by an object they belong to)
end;