Tool Layout

Tool Overview

There are primary sections of the tool:

Header (Green)
Footer (Purple)
Class List (Blue)
Point Cloud (Yellow)
Image Panel (Red)
Annotation Detail (On Selecting an Annotation) (Orange)

Header

The header consists of the following actions:

BEV-3D Mode

Toggle to view the point cloud in 2D (Top view) or default 3D.
When 2D is ON, annotators can mark objects from the top view using Rectangle interactions to create a Cuboid.
When 3D is ON, annotators can mark objects from any angle by dropping a Cuboid.

Rotation

Enabled when selecting any Cuboid.
Rotates the Cuboid direction anti-clockwise — useful if the object direction was set incorrectly after dimensioning.
Shortcut: R Key

Autofit

Enabled only after a cuboid is selected.
Removes extra space between the end-most point and the cuboid edge, creating a tighter box while ensuring no point is excluded.
For best results, ensure the object is fully visible and not partially obscured.

Merge Point Cloud

Helpful in sequential tasks to identify and mark objects in their stationary state. Learn how to use it here: https://docs.imerit-prod.io/annotation-tool/key-features/merged-point-cloud
Ideal for static objects; users can also understand the scene better by adjusting the Frame Jump Length.

Outlier

Toggles visibility of unlabelled points; unlabeled points will blink to aid locating them.
Learn how to use it here: https://docs.imerit-prod.io/annotation-tool/key-features/outlier

Isolate

Focus on specific areas of the point cloud to avoid background distraction while labelling.
Learn how to use it here: https://docs.imerit-prod.io/annotation-tool/key-features/isolate

Navigation Controls

There are 2 modes available to navigate the point cloud. Use the stepper below for each mode.

Helicopter Mode

Move (front, left, back, right): Key W, A, S, D
Fly (up, down): Key Q, E
Look around: 4 Arrow Keys
Zoom control: Mouse Wheel or double-click to zoom in

Orbital Mode

Move (up, down, right, left): 4 Arrow Keys
Orbit around:
- Key W, S — orbit top to bottom
- Key A, D — orbit right to left
Zoom control: Mouse Wheel or double-click to zoom in

Fit to Screen

Fits the entire point cloud within the browser screen.
Shortcut: Ctrl + F

Jump to Origin

Navigates back to the default origin coordinates when the task loads.
Shortcut: O (alphabet)

Toggle Fullscreen

Hides the browser bar and makes the tool fullscreen.

Sensor

Ego vehicle may have multiple LiDAR sensors; due to lack of time-sync some staggering of objects can be seen.
Use the sensor filter to select which sensor points to consider.

Status

Enabled on selecting a Cuboid.
Opens a box showing:
- Class
- Dimension
- Instance (if class has instances)
See Cuboid docs: https://docs.imerit-prod.io/annotation-tool/drawing-tools/cuboid

Issues

Enabled in the Audit Tool after the batch reaches the Audit stage: https://docs.imerit-prod.io/audit-tool
Auditors raise issues as issue cards.
After auditing, batches can be reopened in the Annotation tool with issue cards visible for resolution.
How to raise issues: https://docs.imerit-prod.io/audit-tool#how-to-raise-issues

Validation

Executes logical validation on each task to:
1. Ensure better quality
2. Allow retraining of annotators

Help

Top-left help icon shows Shortcuts and Batch-related information.

Shortcuts

Selecting 'Shortcuts' opens a right panel listing labelling shortcuts.
View all shortcuts: https://docs.imerit-prod.io/annotation-tool/tool-shortcuts

Batch Info

Selecting 'Batch Info' shows batch details in a box with a 'Copy to Clipboard' option.

Footer

The footer consists of these actions:

Time Tracker

Displays time spent on a task in real time.

Timeline

Displays all frames within the frame sequence.
To see more frames, drag the horizontal white bar below the timeline.
Navigate by:
- Clicking on a frame
- Dragging the timeline marker
- Entering a frame number
- Clicking first, previous, play, next, last buttons

Menu Option

Tool Setting

Configure Point Cloud visibility and related settings.

Timer Range

Each point captured by a LiDAR sensor has a timestamp relative to the frame reference time.
Using the Timer Range filter you can select a range (e.g., -49 to +49) to filter points. Keeping sliders fully extended shows the entire point cloud.

Point Budget

Sets number of points to be loaded per frame (default 5 million).
If a frame has >5M points, the tool loads 5M in the viewable area; panning/zooming loads other points.
The tool also preloads previous/next frames for smoothness.
Increasing the limit may increase latency.

Enable Eye Dome Lighting (EDL)

EDL accentuates shapes in a point cloud by visually grouping nearby objects and shading outlines, improving depth perception.

Class Point Brightness

Points that have been classified appear in their class colour.
Use this slider to reduce brightness of coloured points.

Background

Change background colour to suit different lighting situations.

Point Size Modifier

Increase/decrease point size on the screen.

Point Colours

View points in different colour schemes:

Plain Colour: single chosen colour from the palette.
Elevation Gradient: colours based on elevation (Z-axis).
RGBA: uses RGB field if present in point cloud data.
Intensity (B-G-Y-R): maps intensity to Blue → Green → Yellow → Red gradient.
Intensity (B-C-T-G-Li-Y-O-R): maps intensity across a more granular colour ramp (Blue → Cyan → Teal → Green → Lime → Yellow → Orange → Red).
Intensity (Rainbow): rainbow palette.
Intensity Grayscale: maps intensity between white and black.
Classification: displays points based on pre-labeling segmentation (e.g., ground vs non-ground).

Speed Controls

Calibrate mouse scroll speed. Higher value = further distance traveled per scroll.

Regions of Interest (ROI)

ROI visually defines areas that need labelling.
Learn how to use: https://docs.imerit-prod.io/annotation-tool/key-features/regions-of-interest

Attributes: Task & Batch Level

Task-level attributes and batch-level attributes defined in project setup are reflected here for annotators to input:
- Task-level: https://docs.imerit-prod.io/project-setup/create-recipe/3.-attributes#b.-task-level
- Batch-level: https://docs.imerit-prod.io/project-setup/create-recipe/3.-attributes#c.-batch-level

Adding Comments

Annotators can add doubts or comments; the next expert in the pipeline is notified at the next node: https://docs.imerit-prod.io/project-setup/create-taskflow/1.-taskflow-details#taskflow-templates

Validate Task (AutoQA)

Frame-specific instructions or constraints appear here for annotators to follow.
Read more: https://docs.imerit-prod.io/annotation-tool/tool-layout#autoqa

Class List

Reflects all classes defined during class creation: https://docs.imerit-prod.io/project-setup/create-recipe/2.-classes#create-new-classes
Can be collapsed to maximize point cloud view.
Includes classes with and without instances.

Learn how to use it: https://docs.imerit-prod.io/annotation-tool/key-features/class-list-all

Other Controls (below Class List)

Filled Boxes

Fills cuboids with the class colour.

Object Names

Displays names of all annotations on both point cloud and reference image.

Point Cloud

Central area dedicated to the Point Cloud sensor (3D space for navigation).
Learn about navigation controls above.

Ground and Ceiling Mover

Two-way slider (bottom right) to hide points from ceiling to ground and vice versa; helps control obstructing points.
Learn how to use it: https://docs.imerit-prod.io/annotation-tool/tool-layout#ground-and-ceiling-mover

Show All Points

Filter to keep only ground points visible (calculated with/without ML).

Image Panel

Collapsible image panel below the point cloud containing all cameras linked to the point cloud.
Helps identify objects for marking in the point cloud.
Camera name is shown on each image.
Panel acts like a carousel with arrows to navigate.
Double-clicking an image toggles fullscreen and replaces the point cloud view. Press Esc to return.

Annotation Detail

Annotation Hover

Top-right of the point cloud displays a label of the annotation being hovered over with its attribute values.
Toggle visibility with shortcut: L

Annotation Click (Cuboid Only)

The status link displays class name and dimension details on the top-right of the point cloud (enabled for Cuboid).
Selecting an annotation highlights its occurrence across frames in the timeline using the class colour.
Expanding the timeline shows time-varying and constant attribute values linked to the selected annotation's class:
- Attribute types: https://docs.imerit-prod.io/project-setup/create-recipe/3.-attributes#attribute-type

Annotation Right Click

Users can view details entered at creation time for an annotation.