FiftyOne Annotation

Annotate the right data, not more data. FiftyOne's integrated data annotation platform cuts annotation time by 60-80%. Automate repetitive tasks and focus human effort where it matters most.

Multimodal Labeling

Expert-level 2D and 3D annotation. No data limits.

Create 2D and 3D multi-sensor labels for classification, detection, and segmentation. Adjust bounding boxes and segmentation masks directly in FiftyOne. No limit on the amount of data labeled.

Annotate 2D and 3D scenes

  • Draw 3D cuboids and polylines on point clouds, depth maps, and 3D scenes.
  • Create segmentation masks, classifications, and bounding boxes for 2D image types.
  • Ease 3D labeling of dense image scenes or sparse point clouds by viewing them alongside 2D images and orthographic camera projections.
FiftyOne annotation editor labeling a street scene with bounding boxes for van, person, car, and traffic light, plus a labels panel.

Accurate labels

Label editing and QA

Find and fix labels

Correct labeling mistakes discovered during curation, evaluation, or inspection directly in FiftyOne – no more tool switching or coordination overhead.
Found a labeling error? 1-click workflows let you edit segmentation masks, bounding boxes, and classification labels without leaving the tool.
FiftyOne Edit Detection panel correcting a box and label on a plane mislabeled 'bird,' to find and fix labels.

Data labeling platform

Streamline your workflow with an end-to-end annotation stack

Verify automatic labels with built-in QA
FiftyOne Verified Auto Labeling panel scoring labels by AI risk and flagging problematic ones, for built-in annotation QA.
Create new 2D/3D image labels
FiftyOne annotation editor with bounding boxes labeling a van, person, car, and traffic light in a street scene.
Smart data labeling
FiftyOne embeddings plot with Embeddings, Histogram, and Heatmaps view tabs, for exploring data to guide smart labeling.
Manage annotation schema
FiftyOne schema editor with a GUI/JSON toggle, listing annotation fields like Vehicles, Pedestrians, and Weather conditions.
Identify annotation errors
A kiwi mislabeled 'Banana' beside FiftyOne code filtering labels by mistakenness to surface annotation errors.
Manually correct labels
FiftyOne label editor open on an object mislabeled 'bus,' ready to manually correct the annotation.

Curation and evaluation for annotation

Annotate 60-80% faster, train better models

FiftyOne's curation and evaluation workflows surface the unique samples and data gaps that maximize model performance.

Label the right data, just not more data

Use techniques such as embeddings, auto-tagging, zero-shot selection to identify and prioritize the most valuable data points for labeling.
Embeddings scatter plot colored on a low-to-high scale, illustrating how to prioritize which samples to label first.

Identify annotation mistakes

Surface labeling mistakes by highlighting outliers, false positives, or mismatched predictions with embeddings and evaluation workflows.
FiftyOne annotation review interface scoring AI-generated labels by confidence and risk, beside aerial imagery.

Automated Labeling

Get models into production faster with Automated Labeling

Auto-annotate the most obvious labels to save labeling efforts and costs.

Get auto-labeling with built-in QA

Verified Auto Labeling uses foundation models to automatically generate labels — and adds confidence scoring to prioritize the ones that require human review.
Streamline your annotation workflow — cut QA and annotation costs while maintaining near-human accuracy.
FiftyOne annotation review interface scoring AI-generated labels by confidence and risk, beside aerial imagery.
Faster model iteration
Cut annotation time with label suggestions that learn from your data patterns. Bring your own models for specialized datasets.
Streamline annotation efforts
Reduce human effort while maintaining accuracy through smart automation that handles routine labeling tasks and flags edge cases for review.
Strategic data prioritization
Get end-to-end workflows that automatically identify and prioritize the most impactful samples for labeling to maximize model performance.

ML Research

Auto-labeling rivals human performance

The latest paper from our ML researchers, Auto-Labeling Data for Object Detection, benchmarks auto-labeling against human annotation. We reveal how foundation models can deliver labels at near-human accuracy, while reducing annotation costs by up to 100,000×.
Voxel51 cover graphic titled 'ML Research: Auto-Labeling Benchmarks' over an orange gradient.

Questions?
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Get started with Annotation