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...principle behind face detection is relatively simple, even if the math involved can be complex. Most people have two eyes, eyebrows, a nose and lips - and an algorithm can be trained to look for those common features, or more specifically, their shadows. (For instance, when you take a normal image and heighten the contrast, eye sockets can look like two dark circles.) But even if face detection seems pretty straightforward, the execution isn't always smooth. (See the 50 best inventions...
...ways to create them: by hard-coding a list of rules for the computer to follow when looking for a face, or by showing it a sample set of hundreds, if not thousands, of images and letting it figure out what the ones with faces have in common. In this way, a computer can create its own list of rules, and then programmers will tweak them. You might think the more images - and the more diverse the images - that a computer is fed, the better the system will get, but sometimes the opposite is true. The images can begin...
...most severe future hurricanes - something previous studies couldn't do because of an inability to accurately reproduce a hurricane's structure. A new modeling approach used in this week's study remedies that problem, he says, and suggests that Category 4 and 5 storms will become relatively more common by 2100 - with the important caveat that the change will not become clearly detectable until the second half of the century. The locus of the biggest increase, continues Bender, is projected to be in the western Atlantic, north of about 20 degrees latitude - about where the southern edge of Cuba lies...
It’s not common to have two Ivy League athletes hear their names called during a professional sports draft. It’s especially rare to have two players from the same school join the professional ranks on the same day. But for seniors Andre Akpan and Kwaku Nyamekye, rarity has become reality...
...Brown in the days leading up to the election, the health care issue came up again and again. They were unsettled by the mounting costs of their state's program and even more so by the process they saw going on in Washington. Rather than being drafted with the common good in mind, they said, the health bill was turning into a series of backroom deals - a Medicaid exemption for Senator Ben Nelson's Nebraska, tax breaks for unions, sweeteners for the hospital and drug industries. As a veteran of the Kennedy political operation put it, "They think there...