Annotating An Image In JavaScript – Annotorious

Preview:

Description:

Annotorious is a simple yet feature-rich JavaScript image annotation library that adds custom comments, notes, tags to a specific part of an image.

Features:

• Load pre-defined annotations from a JSON file.
• Drag and drop to create new annotations from an editor popup.
• Based on W3C WebAnnotation model.

How to use it:

1. Install and import the Annotorious as a module.

# NPM
$ npm install @recogito/annotorious --save

import { Annotorious } from '@recogito/annotorious';

2. Or download the package and insert the annotorious.min.js into the HTML document.

<link rel="annotorious.min.css" href="styles.css" />
<script src="annotorious.min.js"></script>

3. Initialize the Annotorious on the image and we’re ready to go.

<img id="example" src="example.jpg" />

var anno = Annotorious.init({
    image: 'example'
});

4. Define your annotations in a w3c.json file and load it on page load.

// annotations.w3c.json
[
  { 
    "@context": "http://www.w3.org/ns/anno.jsonld",
    "id": "#unique-ID-Here",
    "type": "Annotation",
    "body": [{
      "type": "TextualBody",
      "value": "Comments Here"
    }, {
      "type": "TextualBody",
      "purpose": "tagging",
      "value": "Tag 1"
    }, {
      "type": "TextualBody",
      "purpose": "tagging",
      "value": "Tag 2"
    }],
    "target": {
      "selector": [{
        "type": "FragmentSelector",
        "conformsTo": "http://www.w3.org/TR/media-frags/",
        "value": "xywh=pixel:270,120,90,170"
      }]
    }
  }
]

anno.loadAnnotations('annotations.w3c.json');

3. Enable read-only mode. Defaults to false.

var anno = Annotorious.init({
    image: 'example',
    readOnly: true
});

4. Disable the editor popup. Defaults to false.

var anno = Annotorious.init({
    image: 'example',
    headless: true
});

5. Add a new annotation to the image following the structure you’ve seen in the annotations.w3c.json.

// add an annotation
anno.addAnnotation(annotation [, readOnly]);

// add an array of annotations
anno.setAnnotations(annotations);

6. Remove an annotation from the image.

anno.removeAnnotation(ID);

7. Get all annotations.

anno.getAnnotations();

8. Select an annotation.

// select the current annotation
anno.selectAnnotation();

// select a specific annotation
anno.selectAnnotation(ID);

9. Show/hide the annotations.

anno.setAnnotationsVisible(TRUE/FALSE);

10. Apply a custom template to the annotation.

anno.applyTemplate(template, openEditor[TRUE/FALSE]);

11. Destroy the instance.

anno.destroy();

12. Event handlers.

anno.on('selectAnnotation', function(annotation) {
  console.log('selected', annotation);
});

anno.on('createAnnotation', function(a) {
  console.log('created', a);
});

anno.on('updateAnnotation', function(annotation, previous) {
  console.log('updated', previous, 'with', annotation);
});

anno.on('deleteAnnotation', function(annotation) {
  console.log('deleted', annotation);
});

anno.on('mouseEnterAnnotation', function(annotation, event) {
  console.log('mouseEnter', annotation);
});

anno.on('mouseLeaveAnnotation', function(annotation, event) {
  console.log('mouseLeave', annotation);
});

Changelog:

v2.1.3 (10/14/2020)

• Dim mask now also available for the polygon drawing tool
• Czech UI translation
• Tag widget: fixed broken autosuggest behavior
• Editor plugins: config params are now properly forwarded to plugin args

v2.1.2 (09/22/2020)

• Environment is no longer a global object, meaning that it is now safe to use multiple Recogito/Annotorious instances on the same page
• All CSS classes are now properly prefixed to avoid clashes with other styles on the page (either with a9s for Annotorious-specific elements or r6o for elements imported from Recogito core
• Small bugfixes to the dim mask

v2.1.1 (09/20/2020)

• CSS styles are no longer embedded in the JavaScript file, but now have to be imported separately.
• Editor widgets are becoming more flexible. This release is the first to include beta support for a plugin API. As a consequence, this version introduces a minimal change to how the tag widget is configured with a controlled vocabulary.

v2.0.8 (09/13/2020)

• Minor bugfix

v2.0.7 (08/29/2020)

• IE11 support bugfixes

v2.0.6 (08/29/2020)

• IE11 compatibility
• Editable polygon shapes
• Bugfixes concerning the behavior of the tag autosuggest component
• Security fixes for library dependencies

v2.0.5 (07/12/2020)

• Added babel polyfill (IE11 compat)

v2.0.4 (07/12/2020)

• Beta support for rendering any SVG shape contained in W3C Web Annotations
• Beta support for polygon drawing
• Various bugfixes
• Portuguese UI translation
• Tag widget: controlled vocabulary autosuggest
• Selecting an annotation now adds a selected CSS class

v2.0.3 (06/12/2020)

• Various smaller bugfixes
• Microsoft Edge compatibility
• Experimental support for responsive images
• Web Annotation standard compliance: target now includes a source property with the image source URL
• Minor API changes: selectAnnotation method now returns selected annotation object and does not fire the selectAnnotation event
• Added support for internationalization
• Ability to handle user information for UI display and when creating/updating annotations
• Ability to add created and modified timestamps, with an option for the host application to sync with the server time

v2.0.2 (05/21/2020)

• Minor bugfixes
• Enabling readOnly annotations

v2.0.2 (05/21/2020)

• Minor bugfixes