Help Overview

RectLabel version 2023.11.19

- Improved Create polygon using SAM feature so that the number of polygon points are reduced for small regions.

- Improved merging polygons feature so that neighbour polygons are connected.

- Improved converting mask to polygon feature so that the hole is represented in the polygon format.

- Improved erasing polygon feature so that you can erase inside the polygon to represent the hole.

- Added "Copy as erase mask" and "Paste as erase mask" right click menus for polygons.

Report issues

Post the problem to our Github issues page.

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Thank you.


For the error message "The application can't be opened", please check your macOS version is greater than equal to 10.13.

If you installed RectLabel on your new computer, authorize or deauthorize your computer for iTunes Store purchases.

If RectLabel does not work correctly, delete cache files.

  • The cache files path is "~/Library/Containers/RectLabel", or "~/Library/Containers/com.waysify.roi", or "~/Library/Containers/com.waysify.roi.vpp".
  • Backup the settings file "the_cache_files_path/Data/settings_labels.json".
  • Delete the cache files.
  • Clean up the trash box and launch RectLabel.

If you encounter in-app purchasing errors, reboot your Mac.

  • Delete RectLabel via the Launchpad app.
  • Log out of the Mac App Store.
  • Reboot your Mac.
  • Log back in to the Mac App Store and install RectLabel.

Key features

Label polygons using Segment Anything models

Label pixels using Segment Anything models

Label cubic bezier curves, line segments, and points

Label oriented bounding boxes in aerial images

Label keypoints with a skeleton

Label pixels with brushes and superpixels

Automatic labeling using Core ML models

Automatic text recognition using Vision framework

Settings for objects, attributes, hotkeys, and labeling fast

Search object, attribute, and image names in a gallery view

Export to COCO, Labelme, CreateML, YOLO, DOTA, and CSV formats

Export indexed color mask image and grayscale mask images

Video to image frames, augment images, etc.

Feature requests

  • iPadOS version
  • Windows version
  • Ubuntu version

Tutorials cited RectLabel

Papers cited RectLabel