API documentationThis page provides various resources to help you use ImageNet.
Mapping between ImageNet and WordNetImageNet is based upon WordNet 3.0. To uniquely identify a synset, we use "WordNet ID" (wnid), which is a concatenation of POS ( i.e. part of speech ) and SYNSET OFFSET of WordNet. For more information, please refer to the WordNet documentation. ImageNet currently only considers nouns, so every wnid starts with "n". For example, the wnid of synset "dog, domestic dog, Canis familiaris" is "n02084071".
When you use the explorer to browse a synset, you can find the WordNet ID below the image window.Click Here to find out the wnid of "Dog, domestic dog, Canis familiaris".
Access synset pagesGiven the wnid of a synset, its ImageNet page is at
Obtain the hyponym (children synset) of a synsetGiven the wnid of a synset, the wnid of hyponym synsets can be obtained at
Obtain the words of a synsetGiven the wnid of a synset, the words of the synset can be obtained at
Access the list of synsets availableYou can use the following API to obtain a list of all synsets available
The following file provides all "is-a" relations provided by WordNet 3.0. Each line is a parent-child pair.
Obtain the structure and release status of ImageNet
You can download the structure of current ImageNet release (the same structure as in Explore page) at
Please note that there are dummy nodes that do not belong to the WordNet V3.0 (e.g. the Misc node). The relations involving the dummy nodes also do not belong to the original WordNet.You can download the release status of ImageNet at
Access image URLs by synset IDGiven the wnid of a synset, the URLs of its images can be obtained at
Access (image names, image URLs) mapping by synset IDIf you download the original images of a synset from a tar file, you may want to know the original image URLs given the image names. You can obtain the mapping between image names and image URLs through
Access imagesBecause the images may be subject to copyright, ImageNet does not make images in their original resolutions publicly available on our server. However, for non-commercial research and/or educational use, we may provide access through our site under certain conditions. More details are here.
Download Image FeaturesImageNet allows users to download image features for free. Please refer to Download Features for more details.
Download Object Bounding BoxesImageNet allows users to download object bounding boxes for free. Please refer to Download Object Bounding Boxes for more details.