Contour Completion of Partly Occluded Skew-Symmetry Objects

This paper proposes a method for contour completion of a skew-symmetry object which is partly occluded by other objects. The proposed method assumes that skew symmetry of a shape can be measured by correlation with its reflection on a no orthogonal plane. Under the assumption, the method estimates a skew-symmetry axis and a skew transverse angle, and then reflects the contour to the estimated axis considering the skew-transverse angle. Using the reflected contour as a patch, the occluded part of the contour is restored. However, due to the information loss caused by occlusion, the reflected contour slightly moves from the correct position. The method moves the reflected contour within a small range to smoothly connect it with the original contour. We experimentally confirmed the effectiveness and limitation of the proposed method by comparing the proposed method with the human perception.