In fourth grade, my best friend and I developed our own sign language so we could communicate across the room and no one would know what we were saying. Unfortunately, our teacher didn't appreciate our "silent" technique. We may have gotten into a lot less trouble if we knew about the reversible data hiding technique developed by Mehmet U. Celik and A. Murat Tekalp of the University of Rochester and Gaurav Sharma and Eli Saber of Xerox. These scientists invented a method for hiding and extracting information within an ordinary digital image. Commonly-used techniques for embedding messages such as digital watermarking irreversibly change the image, resulting in distortions or information loss. "With our new data embedding algorithm, authorized recipients not only can extract the embedded message but also can recover the original image intact," says Sharma. "The technique offers a significantly higher capacity for embedding data and a lower-distortion than any of the alternatives." The technique will be widely applicable to situations requiring authentication of images such as in forensics. It can also be used to encode information about the image itself, such as who took the picture, when, or with what camera. For more information, contact: Ahmet Tekalp at (585) 275-3774 or e-mail: email@example.com.
Festo's BionicKangaroo combines pneumatic and electrical drive technology, plus very precise controls and condition monitoring. Like a real kangaroo, the BionicKangaroo robot harvests the kinetic energy of each takeoff and immediately uses it to power the next jump.
Design News and Digi-Key presents: Creating & Testing Your First RTOS Application Using MQX, a crash course that will look at defining a project, selecting a target processor, blocking code, defining tasks, completing code, and debugging.
Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.