Introduced in The Open Images Dataset V4: Unified image classification, object detection, and visual relationship detection at scale2018
Open Images V4 offers large scale across several dimensions: 30.1M image-level labels for 19.8k concepts, 15.4M bounding boxes for 600 object classes, and 375k visual relationship annotations involving 57 classes. For object detection in particular, 15x more bounding boxes than the next largest datasets (15.4M boxes on 1.9M images) are provided. The images often show complex scenes with several objects (8 annotated objects per image on average). Visual relationships between them are annotated, which support visual relationship detection, an emerging task that requires structured reasoning.
Source: The Open Images Dataset V4: Unified image classification, object detection, and visual relationship detection at scale Image Source: https://storage.googleapis.com/openimages/web/index.html
