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Multiview Labeling Format

Overview

Multi-view mode is a feature that allows you to view and annotate multiple images simultaneously. It is especially useful when you need to label objects from different perspectives, 3D reconstruction images, Autonomous vehicle camera views or depth estimation task images. Labeling in multi-view mode can significantly increase the speed of the labeling process (for example, you don't need to switch between images and select a desired class to label the same object)

Just organize images into groups and drop them to the import. The app will do the rest: it will detect groups, tag images, and activate grouping and multi-view modes in the project settings.

Note: To use the multi-view import feature, you need to create a project with the Multi-view image annotation setting enabled. You can also enable this setting in the project settings after the import. Here is a illustration of how to upload multi-view images:

Import Multi-view images

Format description

Supported image formats: .jpg, .jpeg, .mpo, .bmp, .png, .webp, .tiff, .tif, .jfif, .avif, .heic, and .heif
With annotations: Yes
Annotation types: Tags in Supervisely format
Grouped by: Folders (corresponding tags will be assigned to images)

Key Features

  • All images in groups in the created project will be tagged
  • Images Grouping option will be turned on by default in the created project
  • Images will be grouped by tag's value
  • Tag value is defined by group directory name
  • Works with .nrrd image format (2D only)

How to Use

1. Prepare structure:

  • Archive zip, tar, tar.xz, tar.gz

      📦 my_project.zip
   ┗ 📂 cars catalog
      ┗ 📂 used cars
         ┣ 📂 105
         ┃  ┣ 🏞️ car_105_front.jpg
         ┃  ┗ 🏞️ car_105_top.jpg
         ┣ 📂 202
         ┃  ┣ 🏞️ car_202_front.jpg
         ┃  ┗ 🏞️ car_202_top.jpg
         ┣ 📂 357
         ┃  ┣ 🏞️ car_357_front.jpg
         ┃  ┗ 🏞️ car_357_top.jpg
         ┣ 🏞️ car_401_front.jpg
         ┣ 🏞️ car_401_top.jpg
         ┗ 🏞️ car_401_side.jpg

  • Folder

      📂 cars catalog
   ┗ 📂 used cars
      ┣ 📂 car_id_105
      ┃  ┣ 🏞️ car_105_front.jpg
      ┃  ┗ 🏞️ car_105_top.jpg
      ┣ 📂 car_id_202
      ┃  ┣ 🏞️ car_202_front.jpg
      ┃  ┗ 🏞️ car_202_top.jpg
      ┣ 📂 car_id_357
      ┃  ┣ 🏞️ car_357_front.jpg
      ┃  ┗ 🏞️ car_357_top.jpg
      ┣ 🏞️ car_401_front.jpg
      ┣ 🏞️ car_401_top.jpg
      ┗ 🏞️ car_401_side.jpg

    Structure explained:

    • Archive must contain only 1 project directory.
    • Inside project directory must be 1 dataset directory.
    • Group directories must be populated with images and placed inside dataset directory. All images inside groups will be tagged with folder name value.
    • All images in the root dataset directory will be uploaded as a regular images and will not be tagged.

    You can download an example data:

  • To display single images switch off Images Grouping setting.

    Switch off multi view mode

  • If you want to disable images grouping for the whole project, go to Project → Settings → Visuals and uncheck

    Disable multi-view mode in project settings

  • Windowing tool is available when working with .nrrd files. It helps to filter pixels to see bones, air, liquids etc.

    Nrrd windowing tool

  • Images view synchronization

    Synchronization OFF Synchronization ON

Useful links