Conventional digital watermarking generally involves adding watermarks after the files have been output. In response, Wen et al.'s research team devised a method called `` Tree-Ring Watermarks ...

The tree-ring method embeds the watermark not in the finished picture, but in the noise at the start. If the software that created a picture is run in reverse, it will reproduce the watermark ...

Perhaps you’ve wandered through a forest or strolled into a neighborhood park and found tree trunks — and wondered if counting the rings on a trunk is truly a way to know the tree’s age.

Those are years under your fingers. Every spring in much of the world, the cells under a tree’s bark wake up and start to divide. This forms a visible ring marking each year of the organism’s ...