danaroth/cave
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--- license: unknown --- # Description This database contains a set multispectral images that were used to emulate the GAP camera. The images are of a wide variety of real-world materials and objects. # Image capture information | | | |---------------------|----------------------------------------| | Camera | Cooled CCD camera (Apogee Alta U260) | | Resolution | 512 x 512 pixel | | Filter | VariSpec liquid crystal tunable filter | | Illuminant | CIE Standard Illuminant D65 | | Range of wevelength | 400nm - 700nm | | Steps | 10nm | | Number of band | 31 band | | Focal length | f/1.4 | | Focus | Fixed (focused using 550nm image) | | Image format | PNG (16bit) | NOTE: These multispectral images represent the reflectances of the materials in the scene. The reflectance spectrum at each pixel was computed from the measured multispectrum image using calibrated estimates of the illumination spectrum and camera spectral response. As a result, each multispectral image should be taken as a close approximation, rather than exact measurement, of the true reflectance of the scene. # Database organization The database consists of 32 scenes, divided into 5 sections. Each scene has an associated zip file. These zip files include full spectral resolution reflectance data from 400nm to 700nm at 10nm steps (31 bands total). Each band is stored as a 16-bit grayscale PNG image. Image filenames are of the format 'object_ms_01.png', where the '01' at the end signifies that this is the first image (captured at 400nm). Thus, '02' corresponds to 410nm, and so on, until '31' for 700nm. Each scene also contains a single representative color image, displayed using sRGB values rendered under a neutral daylight illuminant (D65). # Quick look <figure> <img src= "assets/teaser.png" alt="CAVE" width="500" /> <figcaption>CAVE dataset teaser image.</figcaption> </figure> # Access instructions The database of 32 scenes is divided into 5 sections, as shown below: - [Stuff](https://www.cs.columbia.edu/CAVE/databases/multispectral/stuff/) <figure> <img src= "assets/thumbnail_stuff.png" alt="CAVE stuff" width="500" /> </figure> - [Skin and hair](https://www.cs.columbia.edu/CAVE/databases/multispectral/skin_and_hair/) <figure> <img src= "assets/thumbnail_skin_and_hair.png" alt="CAVE skin and hair" width="300" /> </figure> - [Paints](https://www.cs.columbia.edu/CAVE/databases/multispectral/paints/) <figure> <img src= "assets/thumbnail_paints.png" alt="CAVE paints" width="200" /> </figure> - [Food and drinks](https://www.cs.columbia.edu/CAVE/databases/multispectral/food_and_drinks/) <figure> <img src= "assets/thumbnail_food_and_drinks.png" alt="CAVE food and drinks" width="200" /> </figure> - [Real and fake](https://www.cs.columbia.edu/CAVE/databases/multispectral/real_and_fake/) <figure> <img src= "assets/thumbnail_real_and_fake.png" alt="CAVE real and fake" width="600" /> </figure> # Related project [Generalized assorted pixel camera](https://www.cs.columbia.edu/CAVE/projects/gap_camera/) # Credits The dataset was originally provided by Columbia University and available at: https://www.cs.columbia.edu/CAVE/databases/multispectral/ # Publication Details of the database can be found in the following publication: ``` "Generalized Assorted Pixel Camera: Post-Capture Control of Resolution, Dynamic Range and Spectrum," F. Yasuma, T. Mitsunaga, D. Iso, and S.K. Nayar, Technical Report, Department of Computer Science, Columbia University CUCS-061-08, Nov. 2008. ``` [PDF](https://www1.cs.columbia.edu/CAVE/publications/pdfs/Yasuma_TR08.pdf) - [bib](https://www1.cs.columbia.edu/CAVE/publications/pub_bibtex.php?id=293) - [(C)](http://www1.cs.columbia.edu/CAVE/publications/copyright.html) - [Project Page](http://www.cs.columbia.edu/CAVE/projects/gap_camera/)
许可证：未知 ## 数据集描述 本数据库包含一组用于模拟广义混合像素相机（Generalized Assorted Pixel Camera，GAP相机）的多光谱图像。这些图像涵盖了多种多样的真实世界材质与物体。 ## 图像采集信息 | | | |---------------------|----------------------------------------| | 相机 | 冷却型电荷耦合器件（Charge-Coupled Device, CCD）相机（Apogee Alta U260） | | 分辨率 | 512 × 512 像素 | | 滤光片 | VariSpec 液晶可调谐滤波器 | | 照明体 | 国际照明委员会（Commission Internationale de l'Eclairage, CIE）标准照明体D65 | | 波长范围 | 400nm - 700nm | | 步长 | 10nm | | 波段数量 | 31 个波段 | | 光圈 | f/1.4 | | 对焦方式 | 固定对焦（采用550nm图像完成对焦） | | 图像格式 | PNG（16位） | ## 注意事项 这些多光谱图像代表了场景中材质的反射率。每个像素处的反射光谱，是通过结合校准后的照明光谱与相机光谱响应的估算值，从实测多光谱图像计算得到的。因此，每张多光谱图像仅可视为场景真实反射率的近似结果，而非精确测量值。 ## 数据库组织结构 本数据库共包含32个场景，划分为5个类别。每个场景对应一个压缩包文件。这些压缩包包含了400nm至700nm范围内、以10nm为步长的全光谱分辨率反射率数据（总计31个波段）。每个波段均以16位灰度PNG图像形式存储。图像文件名遵循"object_ms_01.png"格式，末尾的"01"代表该图像为第一幅（拍摄于400nm波长）。以此类推，"02"对应410nm，直至"31"对应700nm。 每个场景还附带一张代表性彩色图像，该图像采用在中性日光照明体（D65）下渲染的sRGB色彩空间值进行显示。 ## 快速预览 <figure> <img src= "assets/teaser.png" alt="CAVE" width="500" /> <figcaption>CAVE数据集预览图。</figcaption> </figure> ## 获取说明 本数据库包含32个场景，分为以下5个类别，链接如下： - [日常物品](https://www.cs.columbia.edu/CAVE/databases/multispectral/stuff/) <figure> <img src= "assets/thumbnail_stuff.png" alt="CAVE 日常物品" width="500" /> </figure> - [皮肤与毛发](https://www.cs.columbia.edu/CAVE/databases/multispectral/skin_and_hair/) <figure> <img src= "assets/thumbnail_skin_and_hair.png" alt="CAVE 皮肤与毛发" width="300" /> </figure> - [颜料与涂料](https://www.cs.columbia.edu/CAVE/databases/multispectral/paints/) <figure> <img src= "assets/thumbnail_paints.png" alt="CAVE 颜料与涂料" width="200" /> </figure> - [食品与饮品](https://www.cs.columbia.edu/CAVE/databases/multispectral/food_and_drinks/) <figure> <img src= "assets/thumbnail_food_and_drinks.png" alt="CAVE 食品与饮品" width="200" /> </figure> - [真实与仿制品](https://www.cs.columbia.edu/CAVE/databases/multispectral/real_and_fake/) <figure> <img src= "assets/thumbnail_real_and_fake.png" alt="CAVE 真实与仿制品" width="600" /> </figure> ## 相关项目 [广义混合像素相机（Generalized Assorted Pixel Camera）](https://www.cs.columbia.edu/CAVE/projects/gap_camera/) ## 致谢 本数据集最初由哥伦比亚大学提供，原始访问地址为： https://www.cs.columbia.edu/CAVE/databases/multispectral/ ## 相关出版物 有关本数据库的详细信息可参阅以下出版物： "广义混合像素相机：分辨率、动态范围与光谱的后捕获控制", F. Yasuma、T. Mitsunaga、D. Iso 与 S.K. Nayar, 哥伦比亚大学计算机科学系技术报告 CUCS-061-08, 2008年11月。 [PDF文档](https://www1.cs.columbia.edu/CAVE/publications/pdfs/Yasuma_TR08.pdf) - [BibTeX引用](https://www1.cs.columbia.edu/CAVE/publications/pub_bibtex.php?id=293) - [版权声明](http://www1.cs.columbia.edu/CAVE/publications/copyright.html) - [项目主页](http://www.cs.columbia.edu/CAVE/projects/gap_camera/)
数据集描述
该数据库包含一组多光谱图像，用于模拟GAP相机。这些图像涵盖了各种真实世界的材料和物体。
图像捕获信息
| 项目 | 信息 |
|---|---|
| 相机 | 冷却CCD相机（Apogee Alta U260） |
| 分辨率 | 512 x 512像素 |
| 滤镜 | VariSpec液晶可调滤光片 |
| 光源 | CIE标准光源D65 |
| 波长范围 | 400nm - 700nm |
| 步长 | 10nm |
| 波段数量 | 31个波段 |
| 焦距 | f/1.4 |
| 焦点 | 固定（使用550nm图像对焦） |
| 图像格式 | PNG（16位） |
注意：这些多光谱图像代表了场景中材料的反射率。每个像素的反射光谱是从测量的多光谱图像中使用校准的照明光谱和相机光谱响应估计计算得出的。因此，每个多光谱图像应视为真实反射率的近似值，而不是精确测量。
数据库组织
数据库包含32个场景，分为5个部分。每个场景都有一个相关的压缩文件。这些压缩文件包括从400nm到700nm以10nm步长（共31个波段）的全光谱分辨率反射率数据。每个波段存储为16位灰度PNG图像。图像文件名格式为object_ms_01.png，其中01表示这是第一个图像（在400nm捕获）。因此，02对应410nm，依此类推，直到31对应700nm。
每个场景还包含一个代表性的彩色图像，使用中性日光光源（D65）下的sRGB值显示。
访问说明
32个场景的数据库分为5个部分：
- Stuff
- Skin and hair
- Paints
- Food and drinks
- Real and fake
相关项目
Generalized assorted pixel camera
贡献
该数据集最初由哥伦比亚大学提供，可访问以下链接获取：
https://www.cs.columbia.edu/CAVE/databases/multispectral/
出版物
数据库的详细信息可在以下出版物中找到：
"Generalized Assorted Pixel Camera: Post-Capture Control of Resolution, Dynamic Range and Spectrum," F. Yasuma, T. Mitsunaga, D. Iso, and S.K. Nayar, Technical Report, Department of Computer Science, Columbia University CUCS-061-08, Nov. 2008.
PDF - bib - (C) - Project Page
