The time-to-contact and the surface orientations of points of interest in the real-world are computed by directly combining the linear description of the cortical flow.
The orientation of point bar strata from the formation is tabulated and the majority is observed to dip paleo-basinward, to the north.
The orientation of Point Source Cube on the X- and Y-axes plane was controlled with a plastic rod, and orientation along the Z-axis depends on the flatness of the double-sided tape.
Let the target image have M interest points, T F = T F 1, T F 2, …, T F M and T F m = x, y, and using the Equation (18), we compose the matrix that describes the distance and orientation of points in S T to each other.
Assume that the source image (or reference image) has a set of J interest points as S F = S F 1, S F 2, …, S F j, …, S F J and S F j = x, y, and using Equation (18), we compose the matrix that describes the distance and orientation of points in S F to each other.
Determining orientation of key points: Using gradient-orientation histogram, each key point is assigned with an orientation at the highest gradient, thus determining main orientations of key points.
r jk is the distance between two interest points, S F j and S F k. θ jk corresponds to the orientation of interest point S F j to S F k.
Besides, whether square defect or rectangular defect, the defect modes change with the orientation of the point defect localizing in the cell only for a bigger defect filling fraction.
This is reasonable since in lower dimensional spaces the shape and orientation of the point clouds must be correctly estimated and taken into account to identify the clusters in a proper way (see Fig. 4).
