Java has a rich set of tools for processing images built in to the standard library. However, it’s not always clear how to use that library to perform even simple tasks. There are already lots of great guides out there for working with images once they’re loaded… but what can Java do without ever loading the image into memory at all?
When working with images from untrusted sources — for example, images discovered during a web crawl — it’s best to treat data defensively. This article will show how to perform some useful tasks on images without ever loading their pixel data into memory.
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