Draw annotations over deep zoom images
JavaScript
Switch branches/tags
Clone or download
Fetching latest commit…
Cannot retrieve the latest commit at this time.

README.md

This plugin allows you to draw vector annotations over OpenSeadragon deep zoom images. The plugin creates the drawings on a SVG overlay that scales with the image.

Preview

Usage

Installation

You will need both OpenSeadragon and this plugin. You can download the plugin manually or install it with a package manager like Bower or npm.

npm install openseadragon openseadragon-annotations --save-dev

Once OpenSeadragon and the plugin are included in your page, you can start an OpenSeadragon viewer with the plugin in this way:

const viewer = OpenSeadragon({
    id: 'viewer',
    showNavigator:  true,
    tileSources: {
        Image: {
            xmlns: 'http://schemas.microsoft.com/deepzoom/2008',
            Url: 'http://content.zoomhub.net/dzis/TDbz_files/',
            Format: 'jpg',
            Overlap: '1',
            TileSize: '254',
            ServerFormat: 'Default',
            Size: {
                Height: '4409',
                Width: '7793'
            }
        }
    }
});

const annotations = new OpenSeadragon.Annotations({ viewer });

The viewer screen will have an additional set of icons at the bottom-left side, that you can use to toggle the drawing mode and draw annotatations over the image.

Supported Browsers

The plugin works on Chrome, Firefox, Opera and Safari. Internet Explorer 9 and above and Microsoft Edge are also supported, but performance is worse in them due to their lack of support for the vector-effect SVG attribute.