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    National Tsing Hua University Institutional Repository > 電機資訊學院 > 電機工程學系 > 期刊論文 >  Maintaining temporal coherence in video retargeting using mosaic-guided scaling

    Please use this identifier to cite or link to this item: http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/83634

    Title: Maintaining temporal coherence in video retargeting using mosaic-guided scaling
    Authors: Tzu-Chieh Yen;Chia-Ming Tsai;Chia-Wen Lin
    教師: 林嘉文
    Date: 2011
    Publisher: Institute of Electrical and Electronics Engineers
    Relation: IEEE TRANSACTIONS ON IMAGE PROCESSING, Institute of Electrical and Electronics Engineers, Volume 20, Issue 8, AUG 2011, Pages 2339-2351
    Keywords: IMAGE
    Abstract: Video retargeting from a full-resolution video to a lower resolution display will inevitably cause information loss. Content-aware video retargeting techniques have been studied to avoid critical visual information loss while resizing a video. Maintaining the spatio-temporal coherence of a retargeted video is very critical on visual quality. Camera motions and object motions, however, usually make it difficult to maintain temporal coherence using existing schemes. In this paper, we propose the use of a panoramic mosaic to guide the scaling of corresponding regions of video frames in a video shot to ensure good temporal coherence. In the proposed method, after aligning video frames in a shot to a panoramic mosaic constructed for the shot, a global scaling map for these frames is derived from the panoramic mosaic. Subsequently, the local scaling maps of individual frames are derived from the global map and is further refined according to spatial coherence constraints. Our experimental results show that the proposed method can effectively maintain temporal coherence so as to achieve good visual quality even a video contains camera motions and object motions.
    Relation Link: http:/dx.doi.org/10.1109/TIP.2011.2114357
    URI: http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/83634
    Appears in Collections:[電機工程學系] 期刊論文
    [光電研究中心] 期刊論文

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