映像情報メディア学会誌
Online ISSN : 1881-6908
Print ISSN : 1342-6907
ISSN-L : 1342-6907
67 巻 , 3 号
選択された号の論文の24件中1~24を表示しています
ふぉーかす
特 集
新たな応用分野を切り拓くセンサ・カメラ技術
話 題
講 座
基礎からの画像符号化(5,6)
映像情報メディア年報2013シリーズ(3)
知っておきたいキーワード(第86回)
私の研究開発ツール(第66回)
番組制作ファイル(最終回)
ニュース
論文・研究速報
論文特集 イメージセンシング技術とその応用・周辺技術
特集論文
  • 大高 俊徳, 山﨑 智裕, 浜本 隆之
    2013 年 67 巻 3 号 p. J82-J88
    発行日: 2013年
    公開日: 2013/02/25
    ジャーナル フリー
    A CMOS image sensor targeted for scene understanding imaging, whose focal plane is split into multiple macro-pixels consisting of 128(H) × 128(V) pixels is discussed. The proposed architecture provides fine and aggressive adjustments of the imaging parameters on the focal plane by way of the independent control on each macro-pixel. As a result, extended intra-scene dynamic range imaging is achieved without reducing the frame rate, which is difficult to achieve with the conventional batch-scan-imaging scheme. Also, the adaptive time resolution control enabling a faster frame rate for moving objects and a slower rate for the background makes it possible to drastically reduce the data transmission bandwidth without compromising the object tracking performance. Based on this concept, we fabricated a test chip using a 0.18-μm 1P5M standard CMOS process. The independent exposure time and frame rate controls were demonstrated with <0.04% column fixed pattern noise (FPN) and </0.11% temporal noise.
  • Hideki Mutoh
    2013 年 67 巻 3 号 p. J89-J94
    発行日: 2013年
    公開日: 2013/02/25
    ジャーナル フリー
    Physical models and algorithms for device simulation for high-speed image sensors are proposed. To obtain consistent basic equations for both the device and wave optical simulations, the electromagnetic scalar field is newly introduced to realize current injection and absorption at electrode surfaces and carrier generation-recombination in semiconductors. The propagation of an electromagnetic field induced by electrodes can be considered by using the proposed equations and similar algorithms as used in the FDTD method in device simulation. The 1D field propagations in silicon and Si3N4 are calculated by ignoring magnetic field. It is shown that the proposed equations and algorithms can realize device simulation for high-speed image sensors by considering field propagation in semiconductors.
  • 公文 宏明, 長谷山 美紀
    2013 年 67 巻 3 号 p. J95-J103
    発行日: 2013年
    公開日: 2013/02/25
    ジャーナル フリー
    Driver's visibility diminishes severely in rainy conditions at night. The glare on wet road surfaces causes this poor visibility. In this paper, we propose an image processing method that detects the glare on wet road surfaces by Using multiple onboard cameras. We also propose an image generating method that reduces the effect of glare. By Using our method, glare-reduced images can be obtained and by displaying these images on the monitor equipped in the vehicle, the number of traffic accidents can be reduced. The proposed method is based on the characteristic that the road plane has a common planar surface in multiple camera images. By Using this characteristic and a homography matrix, the glare can be detected. Experimental results obtained by applying the proposed method to real image data show its high performance.
特集研究速報
論文
  • 野村 光佑, 大井 隆太朗, 妹尾 孝憲, 栗田 泰市郎, 浜本 隆之
    2013 年 67 巻 3 号 p. J108-J115
    発行日: 2013年
    公開日: 2013/02/25
    ジャーナル フリー
    We have studied holography for photographing and displaying 3D images of real scenes. Although digital holography is known as hologram generation of real scenes, photographing the interference fringe of light has to be performed in the dark room. We propose hologram generation by using a color image and depth map of the same viewing point. In the case of object beam calculation using the maximum diffraction angle depending on wavelength and pixel pitch, we could only observe 3D images in the range of horizontal to 5.6 degrees. In this paper, we report a method that can increase the viewing-zone-angle by using diffraction maps propagating in three directions. As a result, by evaluating the generated hologram with an optical system by the time division, we could easily observe 3D images in the range of horizontal to 16 degrees with both eyes.
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