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abo/README.md

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+# Amazon Berkeley Objects (c) by Amazon.com
+
+[Amazon Berkeley Objects](https://amazon-berkeley-objects.s3.us-east-1.amazonaws.com/index.html)
+is a collection of product listings with multilingual metadata, catalog
+imagery, high-quality 3d models with materials and parts, and benchmarks derived
+from that data.
+
+## License
+
+This work is licensed under the Creative Commons Attribution 4.0 International
+Public License. To obtain a copy of the full license, see LICENSE-CC-BY-4.0.txt,
+visit [CreativeCommons.org](https://creativecommons.org/licenses/by/4.0/)
+or send a letter to Creative Commons, PO Box 1866, Mountain View, CA 94042, USA.
+
+Under the following terms:
+
+  * Attribution — You must give appropriate credit, provide a link to the
+    license, and indicate if changes were made. You may do so in any reasonable
+    manner, but not in any way that suggests the licensor endorses you or your
+    use.
+
+  * No additional restrictions — You may not apply legal terms or technological
+    measures that legally restrict others from doing anything the license
+    permits.
+    
+## Attribution
+
+Credit for the data, including all images and 3d models, must be given to:
+
+> Amazon.com
+
+Credit for building the dataset, archives and benchmark sets must be given to:
+
+> Matthieu Guillaumin (Amazon.com), Thomas Dideriksen (Amazon.com),
+> Kenan Deng (Amazon.com), Himanshu Arora (Amazon.com),
+> Jasmine Collins (UC Berkeley) and Jitendra Malik (UC Berkeley)
+
+## Description
+
+The `3dmodels/` directory and `abo-3dmodels.tar` archives are made of the
+following files:
+
+  * `LICENSE-CC-BY-4.0.txt` - The License file. You must read, agree and
+    comply to the License before using the Amazon Berkeley Objects data.
+
+  * `3dmodels/metadata/3dmodels.csv.gz` - 3d model metadata. This file is a
+    gzip-compressed comma-separated value (CSV) file with the following fields:
+    `3dmodel_id`, `path`, `meshes`, `materials`, `textures`, `images`, 
+    `image_height_max`, `image_height_min`, `image_width_max`,
+    `image_width_min`, `vertices`, `faces`, `extent_x`, `extent_y`, `extent_z`.
+
+    - `3dmodel_id`: Reference for the 3d model, as provided in the `3dmodel_id`
+      field of the listings metadata
+    - `path`: Location of the 3d model, relative to `3dmodels/original/`
+    - `meshes`: Number of meshes in the geometry
+    - `materials`: Number of materials in the 3d model
+    - `textures`: Number of textures in the 3d model
+    - `images`: Number of image resources in the 3d model
+    - `image_{heigh,width}_{min,max}`: Minimal and maximal dimensions of the
+      image resources in the 3d model
+    - `vertices`: Number of vertices in the geometry
+    - `faces`: Number of faces in the geometry
+    - `extent_{x,y,z}`: Extent of the geometry in each dimension
+    
+    Below are are first 10 lines of `3dmodels/metadata/3dmodels.csv.gz`:
+```
+3dmodel_id,path,meshes,materials,textures,images,image_height_max,image_height_min,image_width_max,image_width_min,vertices,faces,extent_x,extent_y,extent_z
+B01N2PLWIL,L/B01N2PLWIL.glb,1,1,3,3,4096,4096,4096,4096,10990,14380,0.571499943733216,0.11684001048680606,0.07111982014177629
+B075QFCHM9,9/B075QFCHM9.glb,1,1,3,3,2048,2048,2048,2048,11973,19568,1.840071976184845,1.0669103860855103,2.3675915002822876
+B07H469871,1/B07H469871.glb,1,1,3,3,4096,4096,4096,4096,1602,1950,1.1113524436950684,1.3880813121795654,0.39794909954071045
+B07H8V49M2,2/B07H8V49M2.glb,1,1,3,3,4096,4096,4096,4096,3760,5710,1.4998703368605968,2.11988401412964,0.5897879977087402
+B07DBHPK4G,G/B07DBHPK4G.glb,1,1,3,3,4096,4096,4096,4096,13704,22736,0.37921489775180817,1.6228150129318237,0.37921497225761414
+B0842LM2DN,N/B0842LM2DN.glb,1,1,3,3,4096,4096,4096,4096,4078,7584,0.22779017686843872,0.2348586767911911,0.22779015451669693
+B07HK6B4D7,7/B07HK6B4D7.glb,1,1,4,4,2048,2048,2048,2048,12221,19268,0.1887289583683014,0.6650936603546143,0.421692430973053
+B07B4FZN9H,H/B07B4FZN9H.glb,1,1,3,3,2048,2048,2048,2048,13595,22644,3.3838289976119995,0.9963648915290833,2.048073887825012
+B07B4Z9BS4,4/B07B4Z9BS4.glb,1,1,4,4,2048,2048,2048,2048,9259,16178,0.2793540060520172,0.2693932056427002,0.2793540358543396
+```
+
+  * `3dmodels/original/<path>` - 3d model files. The 3d models are provided in
+    the [glTF-2.0 format](
+    https://github.com/KhronosGroup/glTF/blob/master/specification/2.0/README.md
+    ) (GLB/binary representation). All models adhere to the following
+    conventions:
+    1. Positive `Y` direction is up.
+    2. Positive `Z` direction is pointing to the *natural* front-side of the
+       product, wherever applicable.
+    3. Products that are designed to stand on a surface (i.e. a floor) are
+       centered on the origin, but translated up (towards positive `Y`) such
+       that they *stand* on the `Y=0` plane.
+    4. Products that are designed to hang from a surface (i.e. a ceiling) are
+       centered on the origin, but translated down (towards negative `Y`) such
+       that they *hang* from the `Y=0` plane.
+    5. Products that are designed to hang on a wall are centered on the origin,
+       but translated forward (towards positive `Z`) such that their backside
+       aligns with the `Z=0` plane.
+