Reversible watermarking could thwart digital photo tricksters

In these days of PhotoShop and its brethren, it’s becoming almost impossible to tell whether or not an image has been digitally manipulated. While some ‘shopping is done simply for whimsical reasons (see picture above), the matter becomes a bit more serious when things such as military images are altered. Visible watermarks are sometimes overlaid on digital photos, but these permanently alter and obscure that copy of the picture. Recently, however, researchers in India came up with a system for verifying a photo’s authenticity, without altering it in any way.

« Back to Reversible watermarking could thwart digital photo tricksters