Keyboard Shortcuts and Mouse Actions for Ground Truth Labeler
On Macintosh platforms, use the Command (⌘) key instead of Ctrl.
|Navigate through ROI labels and their groups in the ROI Label Definition pane.
|Up or Down arrow
|Navigate through scene labels and their groups in the Scene Label Definition pane,
|Hold Alt and press the up arrow or down arrow
|Reorder labels within a group or move labels between groups
|Click and drag labels
|Click and drag groups
Frame Navigation and Time Interval Settings
Navigate between frames and change the time range of the signal. These controls are located in the bottom pane of the app.
|Go to the next frame
|Go to the previous frame
|Go to the last frame
|Go to the first frame
|Navigate through time range boxes and frame navigation buttons
|Commit time interval settings
|Press Enter within the active time interval box (Start Time, Current, or End Time)
Perform labeling actions, such as adding, moving, and deleting regions of interest (ROIs). The ROIs can be pixel labels or non-pixel ROI labels that include line, rectangle, cuboid, and projected cuboid.
|Undo labeling action
|Redo labeling action
|Select all non-pixel ROIs
|Select specific non-pixel ROIs
|Hold Ctrl and click the ROIs you want to select
|Cut selected non-pixel ROIs
|Copy selected non-pixel ROIs to clipboard
Paste copied non-pixel ROIs
For more details, see Use Sublabels and Attributes to Label Ground Truth Data.
Switch between selected non-pixel ROI labels.
You can switch between labels only of the same type. For example, if you select a rectangle ROI, you can switch only between other rectangle ROIs.
|Tab or Shift+Tab
|Move a drawn non-pixel ROI label
|Hold Ctrl and press the up, down, left or right arrows
Resize a rectangle ROI uniformly across all dimensions
|Ctrl+Plus (+) or Ctrl+Minus (-)
|Delete selected non-pixel ROIs
|Copy all pixel ROIs
|Cut all pixel ROIs
|Paste copied or cut pixel ROIs
|Delete all pixel ROIs
Fill all or all remaining pixels
|Create an ROI around the entire frame
|Double-click on canvas with label definition selected
Cuboid Resizing and Moving
Draw cuboids to label lidar point clouds. For examples on how to use these shortcuts to label lidar point clouds efficiently, see Label Lidar Point Clouds for Object Detection.
To enable these shortcuts, you must first click within the point cloud frame to select it.
Resize a cuboid uniformly across all dimensions before applying it to the point cloud
|Hold A and move the scroll wheel up to increase size or down to decrease size
Resize a cuboid along only the x-dimension before applying it to the point cloud
|Hold X and move the scroll wheel up to increase size or down to decrease size
Resize a cuboid along only the y-dimension before applying it to the point cloud
|Hold Y and move the scroll wheel up to increase size or down to decrease size
Resize a cuboid along only the z-dimension before applying it to the point cloud
|Hold Z and move the scroll wheel up to increase size or down to decrease size
|Resize a cuboid after applying it to the point cloud
|Click and drag one of the cuboid faces
|Move a cuboid
Hold Shift and click and drag one of the cuboid faces
The cuboid is translated along the dimension of the selected face.
|Move multiple cuboids simultaneously
Follow these steps:
The cuboids are translated along the dimension of the selected face.
Draw ROI line labels on a frame. ROI line labels are polylines, meaning that they are composed of one or more line segments.
|Commit a polyline to the frame, excluding the currently active line segment
|Press Enter or right-click while drawing the polyline
|Commit a polyline to the frame, including the currently active line segment
Double-click while drawing the polyline
A new line segment is committed at the point where you double-click.
|Delete the previously created line segment in a polyline
|Cancel drawing and delete the entire polyline
Draw polygons to label pixels on a frame.
|Commit a polygon to the frame, excluding the currently active line segment
Press Enter or right-click while drawing the polygon
The polygon closes up by forming a line between the previously committed point and the first point in the polygon.
|Commit a polygon to the frame, including the currently active line segment
Double-click while drawing polygon
The polygon closes up by forming a line between the point where you double-clicked and the first point in the polygon.
|Remove the previously created line segment from a polygon
|Cancel drawing and delete the entire polygon
Zooming, Panning, and Rotating
|Zoom in or out of an image frame
Move the scroll wheel up to zoom in or down to zoom out
If the frame is in pan mode, then zooming is not supported. To enable zooming, in the upper-right corner of the frame, either click the Pan button to disable panning or click one of the zoom buttons.
|Zoom in on specific section of an image frame
In the upper-right corner of the frame, click the Zoom In button and then click and drag within the frame to draw a box around the section that you want to zoom in on
Zooming in on a specific section of a point cloud is not supported.
|Pan across an image frame
|Press the up, down, left, or right arrows
|Zoom in on or out of a point cloud frame
In the top-left corner of the display, click the Zoom In or Zoom Out button. Then, move the scroll wheel up (zoom in) or down (zoom out). Alternatively, move the cursor up or right (zoom in) or down or left (zoom out).
Zooming in and out is supported in all modes (pan, zoom, and rotate).
|Pan across a point cloud frame
Press the a, d, w, and s keys.
Rotate a point cloud frame
Hold R and click and drag the point cloud frame
Only yaw rotation is allowed.
|Save current session