Labelbox documentation

Image editor

Screen_Shot_2021-02-03_at_10_48_35_AM.png

The Labelbox Editor contains specialized tools for labeling images.

Annotation type

Import format

Export format

Segmentation mask

See JSON

See JSON

Bounding box

See JSON

See JSON

Polygon

See JSON

See JSON

Polyline

See JSON

See JSON

Point

See JSON

See JSON

Radio classification

See JSON

See JSON

Checklist classification

See JSON

See JSON

Dropdown classification

See JSON

See JSON

Free-form text classification

See JSON

See JSON

Superpixel

For Segmentation annotations with complex boundaries, using the Superpixel tool first may be more efficient than using the Pen tool alone. Superpixel works by calculating segment clusters of similarly colored pixels in the image. The Superpixel tool is only available when you are creating Segmentation annotations.

segmentation-images-2.png

In the top toolbar is a slider, which allows you to adjust the size of segment clusters from XS to XL. The easiest way to use Superpixel is to segment as much of the object as possible with Superpixel, then adjust the boundaries using the Pen and Eraser tools.

Calculation time for Superpixel segments increases with image size. We advise using images that are no more than 4000 by 4000 pixels.

Pen tool

Use the Pen tool to outline the item in the image. Hold the cursor down to draw freehand or let the cursor go to draw straight lines between points. The Pen tool is only available when creating Segmentation annotations.

pen-tool-images.png
Fill tool

With the fill tool, you can easily segment backgrounds or otherwise assign a segmentation annotation to all other pixels in the image that have not already been labeled. The fill tool is only enabled for Segmentation annotations.

To use the fill tool, click the droplet icon.

fill-tool.png
Draw over existing objects

"Draw over existing objects" is on by default. When this tool is enabled, drawing a new Segmentation annotation over an existing annotation will overwrite previously classified pixels. When this tool is disabled, a new Segmentation annotation drawn over an existing annotation will be "drawn behind" the existing annotation.

draw-over-existing-objects.png

This tool is designed to significantly speed up labeling time since it is not required to intricately outline around the border of other objects. This tool is only available when creating Segmentation annotations.