映像情報メディア学会誌
Online ISSN : 1881-6908
Print ISSN : 1342-6907
ISSN-L : 1342-6907
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67 巻, 6 号
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特　集
非可視光領域のセンシング・画像処理技術
話　題
講　座
基礎からの画像符号化(11,最終回)
映像情報メディア年報2013シリーズ(6)
知っておきたいキーワード（第89回）
私の研究開発ツール（第69回）
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論文特集　コンピュータグラフィックス
特集論文
  • ドラム演奏支援のための動作生成
    粟井 修司, 西尾 孝治, 小堀 研一
    2013 年 67 巻 6 号 p. J155-J162
    発行日: 2013年
    公開日: 2013/05/24
    DOIhttps://doi.org/10.3169/itej.67.J155
    ジャーナル フリー
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    Much experience is necessary to play a musical instrument. In general, it is difficult for beginners to practice a musical instrument. Therefore, there are many supporting systems for playing a musical instrument. In the case of a keyboard, we can play it by just tapping the key shown by the appropriate light indicator. However, you use both hands and feet at the same time when playing the drums. Therefore, we cannot play it by the method for supporting keyboard performance. In this paper, we propose a motion generation method for supporting drum performance using MIDI files. This method helps the beginner to understand the motion of drum performance. Some experimental results show that the proposed method is effective for the practice of drum performance.
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  • 清掃を考慮した床面汚れの表現
    福田 泰大, 田中 敏光, 佐川 雄二
    2013 年 67 巻 6 号 p. J163-J170
    発行日: 2013年
    公開日: 2013/05/24
    DOIhttps://doi.org/10.3169/itej.67.J163
    ジャーナル フリー
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    A method of generating the textures of dirty floors is presented. First, the method computes the position and speed of each walker by simulating the behavior of the crowd. Then, footmarks caused by soil, dust, black grime on the floor and scratches caused by small stones are displayed. Footmarks and scratches are represented by adding shoe sole patterns and hair lines to the floor image, respectively. The amounts of dust and grime are increased with time. However, in the area stepped upon, their amounts are reduced by a fixed percentage. By implementing this, footmarks and scratches appearing at the center of the corridor are displayed. Dust and grime on the wall are displayed, too. In addition, dirty floors are cleaned up at regular intervals. We assumed daily and full cleaning. By repeated cleaning, the images of floors of old but well maintained buildings, on which only a lot of scratches are viewed, can be generated.
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  • しみを含む人体皮膚モデルの構築とその映像化
    河合 利幸, 篠原 優, 木村 亮太, 辻井 瑛喜
    2013 年 67 巻 6 号 p. J171-J179
    発行日: 2013年
    公開日: 2013/05/24
    DOIhttps://doi.org/10.3169/itej.67.J171
    ジャーナル フリー
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    We propose a method for modeling human skin including macules and show the rendering results. This method is intended especially for applications in dermatology and cosmetics. Our model is based on volumetric representation. It consists of nine layers classified by the difference in optical properties. The surface normals and the number of voxels of each layer are derived from measurement data of the real skin surface. Each voxel has a type of layer that indicates the values of the optical parameters. The density distributions of the melanin in the macules are defined by a gray-scale image. We use photon mapping for rendering to consider multiple scattering and spectral attenuation. Rendered images with or without macules can successfully reproduce the color, and the spectral reflectance is also shown.
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  • CosmicAI: 素早い検索・画像合成と作品共有による効率的な空の画像生成
    三谷 隆暢, 藤代 一成
    2013 年 67 巻 6 号 p. J180-J185
    発行日: 2013年
    公開日: 2013/05/24
    DOIhttps://doi.org/10.3169/itej.67.J180
    ジャーナル フリー
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    We propose a novel system, called CosmicAI, for providing an intuitive and efficient way to synthesize 2D sky images. The system utilizes a collection of high-quality proprietary sky part images for backgrounds, clouds, and the moon, and allows the users to generate their own sky images effectively through attribute-based retrieval of these sky parts images and their flexible layout and natural composition based on a new cloud extraction algorithm and an original filter for partly-overlapping pixels. Its one click search and active composition play an important role for realizing rapid image synthesis. Moreover, CosmicAI is capable of collecting via the Internet and searching for composite works. This function promotes group works by giving incentives to users with unclear design motives for generating a wide variety of sky images.
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