### device | electronic device:

Scanner
* Most scanners look like small photocopiers attached to computers.
* Some scanners also use software to convert raster data to vector data.
* allow a user to copy documents or pictures into a computer.
* are a great way to capture photos and even artwork quickly and easily
  - almost the inverse of printers
  - an input device that are becoming more widespread
  - capable of recording much more than just books and photographs
  - detectors
  - devices suitable for entering of graphical information into the computer
  - dishs
  - essential for establishing the identity and location of a virus
  - films
  - important to Internet security because they reveal weaknesses in the network
  - only the most common method of capturing an image
* are programs that automatically detect security weaknesses in remote or local hosts
  - which can recognize lexical patterns in text
  - reviewers
  - superior beings who can read minds and cause others' heads to explode
* are the devices that read bar codes
  - kind of warriors that look at core and attack it only when they find something
  - used for scanning
* capture images by shining light onto the document being scanned.
* color or gray scale scanner.
* come in different sizes.
* connect to computers through a variety of interfaces.
* convert paper documents to electronic form by taking a picture of each page.
* detect light intensity corresponding to the density of the original.
* digitize images and text for computer use
  - printed images
* gather signals from the radio spectrum devoted to short and medium range communications.
* generate a magnetic field that is intercepted by the microchip.
* have trouble discerning the shapes of letters that touch.
* help businesses keep track of their inventory and speed service at the check-out counter.
* is an assembler of the electronic past in our digital future
  - essential tool for diagnosing traumatic brain and spinal cord injury
* operate best when used around a consistent, fairly dim light source.
* play a pivotal role in today's digital imaging applications.
* read information much faster and more reliably than humans can write or type.
* take information that arrives on paper and convert it to a digital image.
* transform hard copies into usable computer information.
* translate information from paper, film, and bar codes into electronic data.
* treat an image as an array of pixels.
* typically use multiple bits to represent information about each pixel of an image.
* utilize electronic circuits to correct color, compress the tones and enhance the detail.
* work much like photocopy machines
  - with strong metallic fields, which builds up energy
+ Fingerprint scanner, Types of fingerprint scanners: Computer hardware :: Data input :: Machines :: Authentication methods
  * The capacitance scanner is better, because the images are more exact and precise. Scanners are used for scanning.
+ Image scanner: Computer hardware :: Data input
  * In computing, an' image scanner' is a device used to transfer images or text into a computer. There are special models for scanning photo negatives, or to scan books. In the computer, the signal from the scanner is transferred to a digital image. This image can then be edited, printed, etc. All scanners have special parts which are used to take a picture from an object.

### device | electronic device | scanner:

Body scanner
* Most body scanners take a number of images from different angles.
+ Body volume index, BVI take body shape into account: Medical signs :: Obesity :: Nutrition
  * Most body scanners take a number of images from different angles. Different lighting as well as patterns projected onto the body are used to determine the body shape and the distribution of the weight in the body of the patient.