voxel51/fiftyone

[FR] Rotated box CVAT integration

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#6,033 opened on Jun 19, 2025

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 (0 comments) (3 reactions) (0 assignees)Python (400 forks)batch import
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Description

Proposal Summary

Support rotated box to export to CVAT. Currently, the rotated box is represented as a Polyline and converted to CVAT as a Polygon Shape. So I can't edit it there. Moreover, it can't be converted to Rectangle in CVAT

What areas of FiftyOne does this feature affect?

  • App: FiftyOne application
  • Core: Core fiftyone Python library
  • Server: FiftyOne server

Contributor guide

Research direction
Examine the current CVAT export code for rotated boxes, which converts them to polygons, and determine how to export them as rotated rectangles in CVAT format, possibly by using the rotated rectangle shape type or converting to axis aligned rectangles with rotation metadata.
Tech stack
python
Domain
backend
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
Half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
FiftyOneCVAT
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
60