A pixel-parallel state-propagation algorithm with self-update of propagation direction for subjective contour generation

Subjective contours are imaginary contours that the vision system in the human brain generates to complete the lacked image information. In order to generate subjective contours, one of the authors already proposed an anisotropic pixel-parallel propagation algorithm, which are suitable for the VLSI implementation. This paper proposes an improved algorithm, in which each pixel can propagate its state to the inherent propagation direction, and also can achieve propagation with arbitrary curvature.