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Custom Engineering · AI and Enterprise System Integration

Designing Annotation Systems

Annotation design decides what the model can ever learn and what the results can ever mean. It is a requirements exercise before it is a labelling exercise.

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Overview

  • Define classes by the decision they support, not by visual similarity.
  • Write an annotation guide with boundary cases — ambiguity between annotators is the largest single source of label noise.
  • Measure inter-annotator agreement; if two trained people disagree, the class definition is not finished.
  • Plan for class changes: a scheme that cannot be revised will be abandoned.

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