Image Transformation Service (ITS)

What is ITS?

The Image Transformation Service (ITS) is a tool that takes large “mezzanine” images and, through the use of transform requests in query strings, dynamically transforms them to a variety of sizes. ITS is also capable of cropping images. Using ITS allows a single image to be modified and used on pages and platforms that may require many different image sizes. ITS is connected to a CDN so image retrieval is much faster. 

• Learn how to resize images
• Learn how to crop images
• Learn how to format the image type and quality

Important notes about ITS

A few things to remember when using ITS:

• Start with the largest image file size possible.
• Supported output file types are jpg and png only.
• You must manually add parameters in the decorator to customize the image returned from ITS.
• If using the proxy service, images may take a few days to be cached in the CDN.

For PBS Internal Developers

• Watch out for DNS issues - a 404 maybe be returned when using image.pbs.org.
• Use Google's DNS.
• Sample code here: https://github.com/pbs/its