Documentation
  • Introduction
  • Tutorials
    • Getting started
    • Python SDK quickstart
    • Model-assisted labeling
  • How to annotate
    • Label images
      • View and navigate in the image interfaces
      • Image interface settings
      • Image segmentation interface
      • Image vector interface
    • Label 3D point clouds
      • View and navigate in the 3D interface
      • Upload, view, and overlay images
      • 3D interface settings
      • 3D point cloud cuboid interface
      • 3D point cloud vector interface
      • 3D point cloud segmentation interface
      • Merged point cloud view (for static objects)
      • Batch mode (for dynamic objects)
      • Smart cuboid propagation
      • 3D to 2D Projection
      • Tips for labeling cuboid sequences
    • Label sequences of data
      • Use track IDs in sequences
      • Use keyframe interpolation
    • Annotate object links (beta)
    • Customize hotkeys
  • How to manage
    • Add collaborators to a dataset
    • Create an organization
    • Configure the label editor
    • Customize label queue
    • Search within a dataset
    • Clone a dataset
    • Work with issues
    • Bulk change label status
    • Manage QA processes
  • How to integrate
    • Import data
      • Cloud integrations
    • Export data
      • Structure of the release file
      • Exporting image annotations to different formats
    • Integrations
      • Hugging Face
      • W&B
      • Databricks
      • SceneBox
    • Create an API key
    • Upload model predictions
    • Set up webhooks
  • Background
    • Main concepts
    • Sequences
    • Label queue mechanics
    • Labeling metrics
    • 3D Tiles
    • Security
  • Reference
    • Python SDK
    • Task types
    • Sample formats
      • Supported file formats
    • Label formats
    • Categories and attributes
    • API
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On this page
  • Upload images along with point clouds
  • Open/close the image viewer
  • Zoom/pan in the image viewer
  • Zoom in/out
  • Pan
  • Toggle the point cloud overlay
  • Use the synchronized image viewer
  • View the active cuboid camera images in the synchronized viewer
  • View the image grid in a new tab

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  1. How to annotate
  2. Label 3D point clouds

Upload, view, and overlay images

PreviousView and navigate in the 3D interfaceNext3D interface settings

Last updated 1 year ago

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See the View and navigate in the 3D interface page for basic 3D navigation principles.

Upload images along with point clouds

Segments.ai allows you to upload images along with point clouds. Additionally, you can also specify the camera calibration parameters, which allows you to view the 3D point cloud and objects on the image. See for information on how to add camera images and calibration parameters to a sample.

Open/close the image viewer

When you open a sample with images, you can see the thumbnails of the images at the bottom of the main labeling window.

Open the image viewer

  • Click on the thumbnail of the image

  • Or press the number key (1 - 9) corresponding to the image. The images are numbered from left to right.

The 3D overlay (of objects and the point cloud) is only visible if the camera parameters of the image are specified.

Close the image viewer

  • Click on the thumbnail of the image again

  • Or press Esc

  • Or press the number key (1 - 9) corresponding to the image again

Zoom/pan in the image viewer

Zoom in/out

To zoom in or out, scroll using the mouse wheel, or double-click in the viewer.

Pan

Hold the hotkey (Ctrl/cmd by default) and click and drag.

Toggle the point cloud overlay

Use the synchronized image viewer

When one or more calibrated images are available, a synchronized image viewer appears in the bottom right of the screen. When hovering in the perspective or top view this viewer automatically zooms to the location of the pointer in the closest camera image.

View the active cuboid camera images in the synchronized viewer

When a cuboid is selected, the synchronized image viewer shows the active cuboid in every camera image where it appears.

To switch between the camera images, press the arrow buttons on the left/right of the synchronized image viewer, or press a rectangle at the bottom of the synchronized image viewer.

View the image grid in a new tab

When adding images to a sample, you have to specify a row and column for each image. This information is used to display a grid of your images. You can view this grid in a separate browser tab (which you could move to a second screen).

You can interact with the images in the grid as follows:

  • To zoom in/out on an image, scroll using the mousewheel or double-click on the image.

  • To pan an image, click and drag on the image.

  • To open the image viewer in the main labeling window, click the camera icon in the top right corner of the image.

To toggle the point cloud overlay on and off, press the hotkey (Ctrl + q by default) or toggle it in the . Disabling the point cloud overlay allows you to see the camera image in more detail, while enabling it allows you to see if the camera and lidar are well calibrated.

You can also zoom/pan in the synchronized image viewer in the same way as in the image viewer (see ).

To open the image grid in a new tab, press the "Open grid" rectangle next to the camera images at the bottom of the main viewer.

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3D interface settings
Camera image