Visual Image Annotation For Computer Vision Datasets

via “multi-task object instance annotation with polygon and rle-encoded segmentation masks”

330K images with object detection, segmentation, and captions.

Unique: Dual segmentation encoding (polygon + RLE) in single dataset enables both precise boundary analysis and efficient computational workflows; 2.5M instances across 330K images provides scale unmatched by contemporaneous datasets (ImageNet had ~1.2M images, PASCAL VOC had ~11K images)

vs others: Larger and more densely annotated than PASCAL VOC (11K images, ~6 objects/image) and more task-diverse than ImageNet (classification-only); RLE encoding enables 10-100x faster mask loading than polygon-only formats