Oblique facial symmetry in three-dimensional reconstruction of linear drawings

The regularities are nothing more than certain "rules" that humans detected in the flat image, and that it helps them to interpret and mentally rebuild the model. Including the best known may be the parallelism and flatness of symmetry and faces. Some of these regularities are too complex to be detected directly in the image of starting. Why are simple perceptual signals. An important, not too regularly studied in the field of three-dimensional reconstruction is the oblique facial symmetry, which aims to detect conditions of symmetry of faces of the intended individuals to rebuild.

From this point of view, there is only a [1] work that has addressed the problem, and it has done by means of a very simplified technique.

This paper explores techniques for obtaining possible axis of oblique symmetry in linear drawings, of which include the work [2] and [3]. We have developed the techniques for searching for axis and methods appropriate to undo the obliquity associated with these axes. Its implementation is presented in a computer application of three-dimensional reconstruction of poliédricos objects.

As future work we hope to complete this quest for axes and with them find planes of symmetry in the pieces, which we would reduce the computational cost and we would offer more accurate models.

[2] Friedberg, S.A. Finding Axes of Skewed Symmetry. Computer Vision, Graphics and Image Processing, vol. 34, pp. 138-155, 1986.

[3] Wen, W.; Yuan, B. Skewed Symmetry detection of closed contours based on their geometric properties. Proc. of the Computer Architectures for Machine Perception, pp. 161-168, 1995