Work with issues

Creating Issues

Both labelers and reviewers can open a new issue on a sample by clicking the icon in the top navigation bar. For example, a labeler might open an issue when unsure how to label something, or a reviewer might open one after finding a mistake in a labeled sample.

When an issue is created, it automatically becomes an "open" issue, indicated by a red number next to to message icon.

An issue must include a description or at least one tag. You can also optionally add screenshots, assign tags for categorization, and link an issue to specific context like sensor, frame, object, track, attributes, or a location. Any available fields will be pre-filled based on your current selection (e.g., the current sensor).

When visualizing an issue, a user can see all the data linked to it. By clicking on the tag, the user is brought directly to the relevant context (e.g., frame, sensor).

Tags

You can configure issue tags to help categorize and triage issues on your dataset. Click the "Issue Tags" section under Settings → Labeling to manage tags.

Each tag has:

• Name: a short label for the tag (must be unique within the dataset)

• Color: choose from 10 preset colors or pick a custom color

• Description (optional): a longer explanation of when to use the tag

Tags can be edited or deleted at any time. Deleting a tag does not remove it from existing issues — it will appear as an orphaned tag with reduced opacity.

Once configured, tags become available in the issue creation and editing forms within the labeling interface. Tags appear as colored badges on the issue. When more than two tags are assigned, the extra tags are collapsed with a "+N" indicator.

Tags help categorize and triage issues — for example, you might use tags like "unclear boundary", "missing object", or "wrong category" to distinguish different types of problems.

Managing Issues

Everyone can "resolve" issues by clicking the checkmark icon. A resolved issue is indicated with a green icon.

Issue authors and admins can edit an issue's description or delete an issue by clicking the ellipsis icon and choosing the action from the dropdown menu.

Everyone can add replies to an issue, and only reply authors can delete their own replies. This feature enables back-and-forth communication between labelers and reviewers. Remember that rejected samples always return to the original labeler, while corrected samples go back to the original reviewer.

Reviewers and admins have access to an issues panel with a filter dropdown. You can filter issues by status (open or closed) and by tags. When filtering by tags, issues matching any of the selected tags are shown. An active filter is indicated by a dot on the filter button.

Anchoring Issues

This functionality is not yet available in the image segmentation interface

For more precision, optional tools are available to anchor an issue to specific elements. An issue can be linked to:

1. A track (and optionally a specific track attribute)

2. A specific location in the point cloud or image

3. The scene itself (and optionally a specific scene attribute)

Link an issue to a specific point or pixel