Table of Contents

Image classification

Alex Cota Updated by Alex Cota

You can use the Image classification tool to create a global or nested Classification on an Object. The classification tool only produces a semantic classification and does not include any geometric annotation or per-pixel classification information. To learn how to apply Classifications to video or text data see, Video classification and Text classification.

There are four classification types:

  • Radio: Use the radio format if you would like a labeler to choose a single answer from a selection of answer choices. The nested radio format allows the labeler to select or search for an answer at each level.
  • Checklist: Use the checklist format if you would like a labeler to choose multiple answers from a selection of answer choices.
  • Dropdown: The nested dropdown allows labelers to select answers from a nested taxonomy.
  • Free-form text: Use the text classification format if you would like a labeler to enter a free-form text answer in response to a classification question.

Import image data

To learn how to import your images directly, see Direct upload. To learn how to import your images URLs via JSON, see Import via JSON. To learn how to attach metadata to your imported images, see Asset metadata via JSON.

To learn how to import programmatically, see Bulk add data rows.

Set up global classification

A global classification on an image provides useful metadata about the image itself.

  1. Bypass the "Add Object" step.
  2. Add a classification question(s).
  3. Select answer choice type and add answer(s).
  4. Click "Confirm".

Set up nested classification on an object

A nested classification provides additional information on an Object (e.g. a Radio classification on a Mask object).

  1. Click "Add Object".
  2. Name your object and choose a labeling tool from the dropdown menu.
  3. Click on the right arrow on the object to open the Settings for that object.
  4. Add a classification question(s).
  5. Select answer choice type and add answer(s).
  6. Click "Done".

To see a sample script for setting up your project’s ontology programmatically, see Project setup script.

You also have the option to reuse ontologies from other projects. To learn more, see Ontology overview.

Searchable radio answers

When you create a radio classification question in your ontology, you have the option to enable autocomplete on the answers by toggling on the "Searchable" feature. When "searchable" is on, your labelers can type in the answer they are looking for instead of having to scroll through a long list of answers to find the one they are looking for.

Note: Enabling autocomplete will disable the hotkeys for that radio classification. To enable hotkeys again, toggle off "searchable".

Label format

To learn how to export your annotations, see How to export labels. To see a sample export for Classifications see Label export formats.

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