Labelbox

How to Label

Labeling Basics

Object Segmentation

The segmentation classes are listed at the top of the interface. To create a segmentation, select a segmentation class and then draw the segment on the image.You can create as many annotations as needed from any of the classes listed.

Example

Example

Classification

The classifications are listed below the segmentation classes. Simply select the answer that applies.

Example

Example

Hotkeys

Hotkeys allow you to complete certain actions using keyboard shortcuts to increase labeling speed. Below is a list of available actions.

Action
Hotkey

Select Class

1-9

Complete shape

f

Undo

cmd/ctrl + z

Redo

cmd/ctrl + y

Delete

backspace

Deselect

escape

Change class of segmentation

c

Submt

e

Skip

a

Next Segment

tab

Previous segmment

shift + tab

Search class

/

Bring to front

cmd/ctrl + arrow up

Send to back

cmd/ctrl + arrow down

Show classifications

period

Fit zoom to segment or map

z

Toggle segments

shift + s

In addition, numbers 1-9 are hotkeys for selecting your available classes.

Pro Tip

If you have a lot of classes, use the Search hotkey to filter down your list of classes. The left of the filtered classes will show the reordered hotkey numbers to choose from. These two steps really help to quickly find and choose the right class and reduce labeling time.

Notable Hotkeys

Change Class

This is useful when a segment was created and you would like to change the class of that segment without having to delete it and create a new one. This is very useful to reduce rework while labeling.

Select the segment, right click or press "c", then choose one of the available classes on the left.

Select the segment, right click or press "c", then choose one of the available classes on the left.

Selecting Segments with Hotkey

The Hotkey for selecting segments are "w" for the next segment and "q" for the previous segment. This can really help decrease labeling time when working with several class annotations on a label.

Using "w" and "q" Hotkeys to quickly select segments

Using "w" and "q" Hotkeys to quickly select segments

Skipping

The skip button will label the data asset as "Skipped".

Re-Enqueueing Skipped Labels

You can put skipped labels back in the queue to be labeled by going to the Activitiy tab, selecting all of the skipped labels and press the Re-Enqueue button.


What's Next

Interface Setup