Browsing by Author "İmre, E."
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Item Open Access Piecewise-planar 3D reconstruction in rate-distortion sense(IEEE, 2007-05) İmre, E.; Güdükbay, Uğur; Alatan, A. A.In this paper, a novel rate-distortion optimization inspired 3D piecewise-planar reconstruction algorithm is proposed. The algorithm refines a coarse 3D triangular mesh, by inserting vertices in a way to minimize the intensity difference between an image and its prediction. The preliminary experiments on synthetic and real data indicate the validity of the proposed approach.Item Open Access Rate-distortion efficient piecewise planar 3-D scene representation from 2-D images(Institute of Electrical and Electronics Engineers, 2009-03) İmre, E.; Alatan, A. A.; Güdükbay, UğurIn any practical application of the 2-D-to-3-D conversion that involves storage and transmission, representation effi- ciency has an undisputable importance that is not reflected in the attention the topic received. In order to address this problem, a novel algorithm, which yields efficient 3-D representations in the rate distortion sense, is proposed. The algorithm utilizes two views of a scene to build a mesh-based representation incrementally, via adding new vertices, while minimizing a distortion measure. The experimental results indicate that, in scenes that can be approximated by planes, the proposed algorithm is superior to the dense depth map and, in some practical situations, to the block motion vector-based representations in the rate-distortion sense.