From Selectstar.

Popular Public Image Datasets

1. Image Net

Used For: Classification and Detection

Image Net is one of the most popular image datasets out there with 14 million image data instances that are organized in a hierarchy. To explain that further, Image Net has images from around 22,000 different categories; however, those categories can be further grouped together to form 27 higher-level categories.

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1. Google’s Open Image Dataset

Used For: Classification and Detection

This dataset contains 9 million annotated images consisting of 600 different classes, and it is very likely that it would contain sufficient instances/ images of the object class that you’re looking for.

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1. Labeled Faces in the Wild Dataset

Used For: Recognition

If you’re planning to build a face detection and/ or recognition application, this is the dataset for you. It contains 13,000 instances of human faces that you can use to train your model. You can use the download link below to get the dataset in the format of your preference.

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1. CIFAR-10 and CIFAR-100

Used For: Classification

These two are by far the most popular image datasets out there. The 10 and 100 in their respective names represent the number of object classes that they contain. CIFAR-10 contains 60,000 images of 10 different classes of objects including airplanes, ships, horses, dogs, etc. CIFAR-100 also has the same number of images but of 100 different object classes.

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1. Plant’s Datasets

Used For: Classification

Here’s another great resource if you’re looking for Image Datasets related to plants. Go to the site and search for the plant type that you’re interested in and proceed to download.

1. MS COCO

Used For: Object detection and segmentation

MS COCO also happens to be one of the most extensive Image Datasets at this time. It has 80 different object categories, has more than 200k labeled images, and is sponsored by Facebook and Microsoft. Plenty of research papers have used this dataset to test their machine learning algorithms and show their power using this dataset as the standard.

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There are thousands of other image datasets available as well, and to explore further options, you can also check out these two articles which list some very useful Image Datasets:

1. 20 Best Image Datasets for Computer Vision
2. 20 50 Free Machine Learning Datasets — Image Datasets