Highly compressed 3D digital archives by illuminating DCT modulated pattern light.

通过照明 DCT 调制图案光来高度压缩 3D 数字档案。

• 批准号: 14550417
• 负责人: SATO Kosuke
• 金额: $ 2.11万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2002
• 资助国家: 日本
• 起止时间: 2002 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-14550417/
• 关键词: Mixed Reality; Image-Based Rendering; Digital Archives; Photometric Environment Reproduction; 能動照明; 全周計測

This research has resulted an extension of Image-Based Rendering (IBR) to represent the specularity of a real object in a virtual environment. A photo of an object captures an image consisting of several physical components; its shape, color, texture, specularity and the lighting condition. This research is intended as an investigation of how to preserve the specularity of an object, which is considerably sensitive to the lighting condition. In the Mixed Reality world, it needs to overlay virtual objects onto real scene with harmonizing the photometric consistency. Many illumination devices usually consist of light sources like light bulbs or LEDs. For reproduction dynamic light environments, it has to adapt the number of light sources and their positions to the current light environments in real-time. To overcome this implemental difficulty, we suggested using LCD panel not as image display device but as illumination device with backlight of LCD. We have developed a new illumination device "LCD cube" for keeping photometric consistency in this research, which is consisting of six inward-pointing LCDs. The system can reproduce arbitrary light environments to the object which is placed at the center of "LCD cube". In order to avoid degrading the image quality due to lower dynamic range of CCD camera, we have produced an idea to capture several images by changing the electronic exposure time of the camera: it generates the high dynamic range light environments by mixing the set of images. As demonstrating, we have presented the method to display high dynamic range light environments by "LCD cube" for Image-Based Lighting. Also, in this research, we have proposed the method for high dynamic range light environments reproduction to avoid degrading the image quality due to dynamic range of CCD camera and LCD display. In addition, we have performed a light reproduction that is a real-time transmission system of light environments with "LCD cube".

该研究扩展了基于图像的渲染（IBR），以表示虚拟环境中真实物体的镜面。物体的照片捕获由若干物理组件组成的图像；它的形状、颜色、纹理、镜面和光照条件。本研究的目的是作为一个调查如何保持镜面的物体，这是相当敏感的照明条件。在混合现实世界中，需要将虚拟物体叠加到真实场景中，并协调光度一致性。许多照明设备通常由灯泡或led等光源组成。对于再现动态光环境，必须实时调整光源的数量和位置以适应当前的光环境。为了克服这一实现困难，我们建议将LCD面板作为LCD背光照明器件而不是图像显示器件。在本研究中，我们开发了一种保持光度一致性的新型照明装置“LCD立方体”，它由六个向内指向的LCD组成。该系统可以将任意光环境重现到放置在“LCD立方体”中心的物体上。为了避免CCD相机动态范围较低而导致图像质量下降，我们提出了通过改变相机的电子曝光时间来捕获多幅图像的想法：通过混合一组图像来产生高动态范围的光环境。作为演示，我们提出了基于图像照明的“LCD立方体”显示高动态范围光环境的方法。在本研究中，我们还提出了一种高动态范围光环境再现方法，以避免CCD相机和LCD显示器的动态范围对图像质量的影响。此外，我们还利用“LCD立方体”进行了光再现，即光环境的实时传输系统。

项目成果

Kosuke Nakayama: "A LCD Cube Transporting High Dynamic Range Light Environments"Proc. of the 2nd International Symposium on Mixed and Augmented Reality. 323-324 (2003)

Kosuke Nakayama：“传输高动态范围光环境的液晶立方体”Proc。

日向匡史, 佐藤宏介, 井白征士: "光切断時間の時空間マッチングによる高精度三次元計測"計測自動制御学会第7回パターン計測シンポジウム. 33-36 (2002)

Tadashi Hinata、Kosuke Sato、Seiji Ijiro：“通过光学切割时间的时空匹配进行高精度三维测量”仪器与控制工程师学会第七届图案测量研讨会33-36（2002）。

Yukiko Yanagawa: "A Support System for Designing Coloration with Mixed Reality Display"Transactions of the Institute of Systems, Control and Information Engineers. Vol.16,No.6. 1-9 (2003)

Yukiko Yanakawa：“混合现实显示设计色彩的支持系统”系统、控制和信息工程师研究所的交易。

多井堅一郎, 金谷一朗, 塚本敏夫, 佐藤宏介: "高精細3次元形状データを用いた拓本画像作成"日本情報考古学会論文誌. Vol.8,No.2. 1-9 (2003)

Kenichiro Tai、Ichiro Kanaya、Toshio Tsukamoto、Kosuke Sato：“使用高清 3D 形状数据进行摩擦图像创作”日本信息考古学会会刊第 8 卷，第 2 期（2003 年）。

Kosuke Nakayama: "A LCD Cube Transporting High Dynamic Range Light Environments"Proc.of the 2nd International Symposium on Mixed and Augmented Reality. 323-324 (2003)

Kosuke Nakayama：“传输高动态范围光环境的 LCD 立方体”，第二届混合与增强现实国际研讨会论文集。