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# GroundTruth Tools

GroundTruth Tools is a collaborative data annotation tool for data preparation of machine learning. It supports multiple common annotation types and multi-user collaborative annotation. Quick start of annotation tasks, it is suitable for small teams to quickly produce data needed for cold start. 

GroundTruth Tools supports 2D BOX, Classification, 2D POLYGON, 2D POLYLINE, and 2D Keypoint.