Slider

Overview of the Slider classification tool in Ango Hub

The Slider classification tool allows you to ask labelers to answer numeric questions by choosing a value on a configurable range.

The Slider tool is supported across the Audio, Image, Video, DICOM, Medical, PDF, Text, LLM, and Markdown labeling editors.

How to add a Slider tool to your project

From the project's Settings tab, enter the Label Set section.

Click on Add Category. From the list that appears, click on Slider.

A new row will appear named Slider. Click on it to expand it.

Slider Tool Options

Schema ID: The unique ID assigned to the tool.

Title: The name of your Slider classification.

Description: Optional text shown to labelers in the labeling editor.

Required: If you enable this toggle, labelers will be required to answer this field before saving.

Min Value: The lowest numeric value labelers can select.

Max Value: The highest numeric value labelers can select.

Step Size: The interval between selectable slider values. For example, a step size of 1 allows whole numbers, while 0.5 allows half-step values.

Min Label: Optional text shown at the low end of the slider.

Max Label: Optional text shown at the high end of the slider.

Frame-specific: If you enable this toggle, the answer to this classification will only be valid for one frame in videos and multi-frame images/DICOMs instead of the whole asset.

Data-specific: If you enable this toggle, the answer to this classification will be stored separately for each data item in grouped assets.

Multiple: If enabled, annotators can answer this classification multiple times.

Slider answers are saved and exported as numeric values.

Once you have selected your options, click on Save at the bottom to save your changes.