Fast view prediction for stereo images based on Delaunay triangular mesh model |
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Authors: | Guo Dabo Lu Zhaoyang Jiao Weidong |
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Institution: | 1. State Key Laboratory of Integrated Service Networks, Xidian Univ., Xi'an 710071, P. R. China;Coll. of Physics & Electronics Engineering, Shanxi Univ., Taiyuan 030006, P. R. China 2. State Key Laboratory of Integrated Service Networks, Xidian Univ., Xi'an 710071, P. R. China |
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Abstract: | The view prediction is an important step in stereo/multiview video coding, wherein, disparity esti-mation (DE) is a key and difficult operation. DE algorithms usually require enormous computing power. A fast DE algorithm based on Delaunay triangulation (DT) is proposed. First, a flexible and content adaptive DT mesh is established on a target frame by an iterative split-merge algorithm. Second, DE on DT nodes are performed in a three-stage algorithm, which gives the majority of nodes a good estimate of the disparity vectors (DV), by removing unreliable nodes due to occlusion, and forcing the minority of 'problematic nodes' to be searched again, within their umbrella-shaped polygon, to the best. Finally, the target view is predicted by using affine transformation. Experimental results show that the proposed algorithm can give a satisfactory DE with less computational cost. |
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Keywords: | image reconstruction disparity estimation view prediction triangular mesh |
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