WHEN CODEWORD FREQUENCY MEETS GEOGRAPHICAL LOCATION | |
Ji, Rongrong ; Duan, Ling-Yu ; Chen, Jie ; Yao, Hongxun ; Gao, Wen | |
2011 | |
关键词 | landmark search mobile search visual vocabulary codeword frequency geographical clustering |
英文摘要 | When codeword frequency meets geographical location in landmark search applications, is it still discriminative for the search procedure? In this paper, we give a systematic investigation about how geographical location affects the effectiveness of codeword frequency. We explain why the standard IDF in the BoW models is less effective in location related search applications [11][12]. Consequently, we propose a "location discriminative codeword frequency" strategy to introduce the location context into the codeword discriminability measurement. This new codeword frequency is calculated in each geographical region, for which a spectral clustering scheme is proposed to partition the geographical map of each city into distinct regions. Extensive comparisons over the standard codeword frequency in state-of-the-art landmark search systems [1][1] demonstrates our approach's effectiveness.; Acoustics; Engineering, Electrical & Electronic; Imaging Science & Photographic Technology; EI; CPCI-S(ISTP); 1 |
语种 | 英语 |
DOI标识 | 10.1109/ICASSP.2011.5946967 |
内容类型 | 其他 |
源URL | [http://ir.pku.edu.cn/handle/20.500.11897/293098] |
专题 | 信息科学技术学院 |
推荐引用方式 GB/T 7714 | Ji, Rongrong,Duan, Ling-Yu,Chen, Jie,et al. WHEN CODEWORD FREQUENCY MEETS GEOGRAPHICAL LOCATION. 2011-01-01. |
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