映像情報メディア学会誌
Online ISSN : 1881-6908
Print ISSN : 1342-6907
ISSN-L : 1342-6907
65 巻, 5 号
選択された号の論文の25件中1~25を表示しています
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超臨場感技術
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  • 三柴 数, 池原 雅章
    2011 年 65 巻 5 号 p. 698-703
    発行日: 2011/05/01
    公開日: 2011/08/01
    ジャーナル フリー
    Content-aware image resizing techniques have become more important with the development of device technology. Although the seam carving method produces high-quality resized images, it requires high computational complexity. In this paper, we propose a novel content-aware image resizing technique that performs the seam carving method in the wavelet transform domain. This approach reduces the computational complexity of image resizing. To avoid breaking the spatial continuity of an image, we reduce the image width by scaling the seam width down instead of carving it out. In addition, the decomposition level is decreased adaptively to avoid distortion. We demonstrate how our method is faster than the seam carving method at producing resized images that retain the important regions.
  • 秋葉 将和, チャロトーン リュウチャワリット, 菅野 恒雄, 長尾 智晴
    2011 年 65 巻 5 号 p. 704-712
    発行日: 2011/05/01
    公開日: 2011/08/01
    ジャーナル フリー
    We used facial images of racially close group such as Japanese and Thais to study which features affect the viewer's impression of ethnicity. Principle component analysis (PCA) was done to extract the racial features of the sample group. The facial features were separated into information on texture and shape, and the PCA was applied to each. We compared the basic with the weighted PCA with the score related to impression of race. The racial impression score was provided by a psychological experiment. A weighted PCA with information of the user's impression extracted racial facial features from an image that had fewer cues to ethnicity because of changed facial direction and reduced lighting. The extracted features of texture and shape could be used for the racial impression conversion of facial images. We suggest that the identification of features typical of a given race relies on detailed texture rather than shape.
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