Full Body Imaging

By now, everyone is aware of the increased airport security features that have cropped up in the last few years. Recently the U.S. Department of Homeland Security unveiled their latest security innovation the usage of full body imaging machines to replace metal detectors. The use of these new machines began back in 2007 and have slowly begun making their way into airports all over the United States.

Full body imaging technology is the equivalent of a physically invasive strip-search only done virtually using advanced x-rays to detect weapons and other items of interest on the 3-D images of the people that pass through them. These machines detect both metallic and non-metallic items of interest to help keep passengers and flight crews safe.

Full Body Imaging

The opposition to these machines claim that the images the machine takes shows a person totally naked, not just the image we are used to seeing when we get an x-ray taken at our doctor’s office. There is an outcry that this violates our personal privacy rights, our religious freedom rights, our fourth amendment rights and that these machines actually see more than anyone is telling us or that we would be comfortable with. A public interest research group based in Washington called EPIC (Electronic Privacy Information Center) has filed a lawsuit to suspend the deployment and use of body scanners claiming the machines use is unlawful, invasive and totally ineffective.

TSA officials say the computers programmed for the full body imaging have zero storage capacity and images are automatically deleted when the next person steps through the machine. Also, the operators are not allowed to bring any recording devices into the viewing area with them as they work (such as cell phones or cameras) to help ensure public privacy. As an added protection feature, the machine automatically blurs the human face that it sees, making it resemble a very fuzzy negative.

~ K. McMillan-Ralph, TeCHS

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Charge-Coupled Device (CCD) Technology

A CCD (Charge-Coupled Device) is a small device that is made up of a photoactive region and a transmission region where the device will “shift” a signal between these regions one stage at a time to then be fed out for transmission, recording or other processing. More simply, it’s a type of semiconductor that is sensitive to light and stores an electrical charge.

CCD

CCD technology was invented in 1969 at Bell Labs by scientists William Boyle and George E. Smith. The essence of the design was the ability to transfer charge along the surface of a semiconductor from one storage capacitor to the next. CCDs were originally intended to store computer data; however it didn’t take long for cheaper, better functioning and faster technologies to overtake that specific market.

Instead CCDs spread into the TV camera and flatbed scanner arenas and then finally to overtake the digital camera market and is now the heart of all digital imaging devices sold today. The expense comes in when trying to capture color. There are a few ways to do this but only one will give you a crisp, clear and true-to-life colors: a CCD array that has three arrays each covered by a filter (one of each primary color). With other types of arrays you will see a definite loss in image resolution and even extra colors in odd places that were not actually there.

As with anything else, there are a few drawbacks to CCD technology. The CCD element can fade, bloom and smear; meaning light striking the sensor at the wrong time or simple pixel loss. CCDs are also still rather expensive but these are all minor when you compare the quality of the picture you can take with a camera housing CCD technology.

~ K. McMillan-Ralph, TeCHS

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www.ezDigitalLife.com

Your Digital Life Simplified!

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