Bitmask

The Bitmask tag for pixel-wise image segmentation tasks is used in the area where you want to apply a mask or use a brush to draw a region on the image.

Bitmask operates on pixel level and outputs a Base64 encoded PNG data URL image with black pixels on transparent background.

Export data example: data-url:image/png;[base64-encoded-string]

Note: You need to set smoothing="false" on the Image tag to be able to work with individual pixels;

Use with the following data types: image.

Parameters

Param	Type	Default	Description
name	string		Name of the element
toName	string		Name of the image to label
[choice]	single | multiple	single	Configure whether the data labeler can select one or multiple labels
[maxUsages]	number		Maximum number of times a label can be used per task
[showInline]	boolean	true	Show labels in the same visual line
[smart]	boolean		Show smart tool for interactive pre-annotations
[smartOnly]	boolean		Only show smart tool for interactive pre-annotations

Example

Basic image segmentation labeling configuration:

<View>
  <Bitmask name="bitmask" toName="image" />
  <Labels name="labels" toName="image">
    <Label value="Person" />
    <Label value="Animal" />
  </Labels>
  <Image name="image" value="$image" />
</View>