The process of tagging data with labels or annotations to teach AI models what patterns to recognize. Like grading homework to teach students the right answers.
Training an image recognition model requires thousands of photos labeled with what objects they contain, like 'cat', 'dog', or 'car'.
All four provide managed workflows to create labeled datasets for ML (human labeling, optional automation/active learning, quality control, and export to training pipelines). AWS, Azure, and GCP integrate tightly with their ML platforms (SageMaker, Azure ML, Vertex AI). OCI Data Labeling integrates with OCI Data Science and OCI Object Storage.