ImageNet

External

Linked on 11/26/2021

A well-known large-scale image classification dataset with between 1000 and 20000 class labels and multiple million images.

Dataset Characteristics

Image

Subject Area

Computer Science

Associated Tasks

Classification

Feature Type

-

# Instances

14000000

# Features

-

Dataset Information

For what purpose was the dataset created?

The ImageNet dataset was created to support research in large-scale image classification. Note that there various specific subsets that were subsequently created to support various challenge competitions, such as the widely-used ImageNet Large Scale Visual Recognition Challenge (ILSVRC) datasets.

Who funded the creation of the dataset?

The dataset was originally developed by researchers at Princeton University. The original paper on Imagenet (Deng et al, CVPR, 2009) credits the National Science Foundation, Google, Intel, Microsoft, and Yahoo! as providing funding support.

What do the instances in this dataset represent?

Color images of varying sizes obtained via internet search and crowd-sourcing. For machine learning experiments the images are typically cropped to 256 x 256 pixels (or similar size). Images are manually annotated with labels of objects (and for a subset of the images with bounding boxes for the objects)

Are there recommended data splits?

Yes. For the ILSVRC version of the data, https://image-net.org/download.php, the standard partition of the data used in machine learning evaluations contains 1,281,167 training images, 50,000 validation images, and 100,000 test images.

Does the dataset contain data that might be considered sensitive in any way?

Out of the 1000 class labels in the ILSVRC dataset, 3 involve people. As ImageNet became more widely used, researchers became aware of issues related to fairness, representation, and offensive vocabulary for the images and annotations in these 3 categories. The ImageNet team at Princeton and Stanford are working on modifying the original ImageNet dataset to address these issues. For additional information see https://image-net.org/update-mar-11-2021.php and https://image-net.org/update-sep-17-2019.php

Was there any data preprocessing performed?

See the Deng et al, CVPR 2009 paper for details

Has Missing Values?

No

Introductory Paper

ImageNet: A Large-Scale Hierarchical Image Database

By Deng, J. and Dong, W. and Socher, R. and Li, L.-J. and Li, K. and Fei-Fei, L.. 2009

Published in CVPR

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Keywords

object detection

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