B-spline based stereo for 3D reconstruction of line-like objects using affine camera model

This paper presents a novel curve based algorithm of stereo vision to recon struct 3D line-like objects. B-spline approximations of 2D edge curves are selected as primitives for the reconstruction of their corresponding space curves so that, under the assumption of affine camera model, a 3D curve can be derived from reconstructing its control points according to the affine invariant property of B-Spline curves. The superiority of B-spline model in representing free-form curves gives good geometric properties of reconstru ction results. Both theoretical analysis and experimental results demonstra te the validity of our approach.