Brightness-contrast diffusion and the grouping of missing angles
We present a framework for contour fragment grouping. The contour fragments extracted from an image by an appropriate edge-detection procedure are assumed to be attributed with an estimate of brightness contrast. Based on this brightness contrast along detected contour fragments, we reconstruct a smooth (weak membrane) intensity function under the boundary conditions imposed by the contour fragments. This reconstructed intensity function subsequently serves as a potential field φ in a framework of different possible contour grouping processes. In this paper we treat the general problem of grouping two straight line contour fragments building an arbitrary (missing) angle. We solve the grouping problem in closed form a specific grouping process within the suggested framework.
KeywordsPotential Field Laplace Equation Intensity Function Tangent Direction Brightness Contrast
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