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    Abstract:

    This paper presents a new view synthesis technique using image morphing and 2-D discrete wavelet transform. The paper aims at pairwise images that are known without camera calibration and any other geometric information. Firstly, estimate the fundamental matrix related with any pair of images by techniques from stereovision. Using fundamental matrix, any pair of image planes can be rectified to be parallel and their corresponding points lie on the same scanline. Secondly, the paper describes an image morphing algorithm running in the wavelet domain. The proposed algorithm can synthesize new views more quickly. Any quantization techniques can be embedded here to compress the coefficients in depth. When displaying, compressed images are decoded and an inverse wavelet transform is achieved. Finally, a postwarping procedure is used to transform the interpolated views at desired position. Nice features of using wavelet transformation are its good locality in both space and frequency and its multiresolution representation mode, which makes the generated views be refined progressively and hence is suitable for communication. Also, the paper discusses the influences of different kinds of wavelet on the results.

    Reference
    1  Xu Dan, Pan Zhi-geng, Shi Jiao-ying. Techniques of image-based rendering in virtual reality. Journal of Image and Graphics of China, 1998,3(12):1005~1010 (徐丹,潘志庚,石教英.虚拟现实中基于图像的绘制技术.中国图像图形学报,1998,3(12):1005~1010) 2  Seitz S M, Dyer C R. View morphing. In: Proceedings of the ACM Special Interest Group on Computer Graphics (SIGGRAPH'96). New York: ACM Press, 1996. 21~30 3  Seitz S M, Dyer C R. Photorealistic scene reconstruction by voxel coloring. In: Proceedings of the Image Understanding Workshop. 1997. 1067~1073 4  Wolberg G. Digital Image Warping. Los Alamitos, CA: IEEE Computer Society Press, 1990 5  Nishita T, Fujii T, Nakamae E. Metamorphosis using Bezier clipping. In: Proceedings of the 1st Pacific Conference on Computer Graphics and Applications. Seoul: World Scientific Publishing Co., 1993. 162~173 6  Beier T, Neely S. Feature-Based image metamorphosis. Computer Graphics, 1992,26(2):35~42 7  He T S, Wang S, Arie K. Wavelet-Based volume morphing. In: Proceedings of the Visualization'94. Washington, DC: IEEE Computer Society Press, 1994. 85~92 8  Hughes J F. Schedule Fourier volume morphing. In: Proceedings of the ACM Special Interest Group on Computer Graphics (SIGGRAPH'92). Computer Graphics. New York: ACM Press, 1992. 43~46 9  Luong Q T, Deriche R, Faugeras O et al. On determining the fundamental matrix: analysis of different methods and experimental results. Technical Report, No.RR-1894, NRIA (Institut National de Recherche en Informatique et en Automatique), 1993 10  Xu Dan, Bao Paul, Shi Jiao-ying. Image mosaics based on complex wavelet decomposition. Journal of Softwae, 1998,9(9):656~661 (徐丹,鲍歌,石教英.基于复值小波分解的图像拼合.软件学报,1998,9(9):656~661) 11  Stollnitz E J, Derose T D, Salesin D H. Wavelets for computer graphics: theory and applications. San Francisco, CA: Morgan Kaufmann Publishers, Inc., 1996 12  Mallat S. Multiresolution approximation and wavelet orthonormal bases of L2(R). IEEE Transactions on Pattern Analysis and Machine Intelligence American Mathematics Society, 1989,11(7):69~8
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徐丹,鲍歌,石教英.小波空间的视图变形合成.软件学报,2000,11(4):532-539

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History
  • Received:December 15,1998
  • Revised:April 13,1999
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