Contextual Image Delivery
When developing a mobile version of your Web site, you may want to serve cropped, scaled-down or otherwise transformed versions of the images on your Web server. Contextual Image Delivery lets you construct URLs that transform images server-side at request time, and serve the transformed images to the client.
Using Contextual Image Delivery improves your mobile Web site in several ways:
- Image dimensions suited to client screen size
- Serving an image of the same dimensions as those served on the regular personal computer version of the Web site to the mobile version typically results in a bad user experience. By using the information provided by the Context Engine, you can discover client screen size and adjust your images' dimensions accordingly.
- Performance
- While it is possible to perform scaling, cropping and other transformations client-side, this still means serving the original large image. Images are typically the greatest contributors to page weight, so serving original, large images slows down the mobile version of your site.