Alyssa+Knibb

=I am Alyssa Knibb and I was assigned to present on the uses of Character Readers (OCR, MICR), joystick, light pen, pads and tablets, digital camera, remote control and web cam and to explain each. = =**//__Character Readers (OCR, MICR) __//**= =__The Optical Character Reader (OCR) __= An Optical Character Reader (OCR) is a device that senses the presence of text by recognising the characters. When the document is scanned, a photo-electric device reads the characters, which are then converted to electrical signals. the signals represent patterns that give an indication of the characters involved. This is fast method of data entry for documents that were already typed or written. the accuracy of the input is dependent on the quality of the formation of characters. An OCR is used for:
 * capturing data from airline tickets
 * reading postal codes
 * capturing data from telephone and electricity bill

__MICR (magnetic ink character recognition) __
MICR (magnetic ink character recognition) is a technology used to verify the legitimacy or originality of paper documents, especially cheques. Special ink, which is sensitive to magnetic fields, is used in the printing of certain characters on the original documents. Information can be encoded in the magnetic characters. > > The use of MICR can enhance security and minimize the losses caused by some types of crime. If a document has been forged - for example, a counterfeit check produced using a color photocopying machine, the magnetic-ink line will either not respond to magnetic fields, or will produce an incorrect code when scanned using a device designed to recover the information in the magnetic characters. Even a legitimate check can be rejected if the MICR reader indicates that the owner of the account has a history of writing bad checks. > Retailers commonly use MICR readers to minimize their exposure to check fraud. Corporations and government agencies also use the technology to speed up the sorting of documents. > >

__Joystick __
A **joystick** is an input device consisting of a stick that pivots on a base and reports its angle or direction to the device it is controlling. Joysticks, also known as 'control columns', are the principal control in the cockpit of many civilian and military aircraft, either as a centre stick or side-stick. They often have supplementary switches on them to control other aspects of the aircraft's flight. Joysticks are often used to control video games, and usually have one or more push-buttons whose state can also be read by the computer. A popular variation of the joystick used on modern video game consoles is the analogue stick. Joysticks are also used for controlling machines such as cranes, trucks, underwater unmanned vehicles, wheelchairs, surveillance cameras and zero turning radius lawn mowers. Miniature finger-operated joysticks have been adopted as input devices for smaller electronic equipment such as mobile phones. =__**Light Pen**__ = **A light pen is a light sensitive device that looks like a pen. When the light pen is moved across the screen, its position can be detected. A user can write on the screen in the same way that he/she writes on paper. It is therefore well suited for drawing images or signatures. It can also be used to make a selection from a menu that was displayed in the screen.**

=__**Pads and Tablets**__ =

A **graphics tablet** (also **digitizer**, **digitizing tablet**, **graphics pad**, **drawing tablet** or **pen tablet**) is a computer input device that enables a user to hand-draw images and graphics, similar to the way a person draws images with a pencil and paper. These tablets may also be used to capture data or handwritten signatures. It can also be used to trace an image from a piece of paper which is taped or otherwise secured to the surface. Capturing data in this way, either by tracing or entering the corners of linear poly-lines or shapes is called digitizing. A graphics tablet (also called pen pad or digitizer) consists of a flat surface upon which the user may "draw" or trace an image using an attached stylus, a pen-like drawing apparatus. The image generally does not appear on the tablet itself but, rather, is displayed on the computer monitor. Some tablets, however, come as a functioning secondary computer screen that you can interact with images directly by using the stylus.

=__**Digital Camera**__ = A **digital camera** (or **digicam**) is a camera that takes video or still photographs, or both, digitally by recording images via an electronic image sensor. It is the main device used in the field of digital photography. Most 21st century cameras are digital. Digital cameras can do things film cameras cannot: displaying images on a screen immediately after they are recorded, storing thousands of images on a single small memory device, and deleting images to free storage space. The majority, including most compact cameras, can record moving video with sound as well as still photographs. Some can crop and stitch pictures and perform other elementary image editing. Some have a GPS receiver built in, and can produce Geotagged photographs

__<span style="background-color: #ffffff; color: #ff007a; font-family: Arial,Helvetica,sans-serif;">Remote Control __
A ** remote control ** is a component of an electronic device, most commonly a television set, DVD player and home theatre systems originally used for operating the television device wirelessly from a short line-of-sight distance. Remote control has continually evolved and advanced over recent years to include Bluetooth connectivity, motion sensor enabled capabilities and voice control. The //remote control// is usually contracted to //remote//. It is known by many other names as well, such as //converter//, //clicker//, //the box//, //flipper//, //the tuner//, //the changer//, or //the button//. Commonly, remote controls are Consumer IR devices used to issue commands from a distance to televisions or other consumer electronics such as stereo systems, DVD players and dimmers. Remote controls for these devices are usually small wireless handheld objects with an array of buttons for adjusting various settings such as television channel, track number, and volume. In fact, for the majority of modern devices with this kind of control, the remote contains all the function controls while the controlled device itself only has a handful of essential primary controls. Most of these remotes communicate to their respective devices via infrared (IR) signals and a few via radio signals. Earlier remote controls in the 1970s used u ltrasonic tones. Television IR signals can be mimicked by a universal remote, which is able to emulate the functionality of most major brand television remote controls. =**__<span style="background-color: #ffffff; color: #ff00bd; font-family: Arial,Helvetica,sans-serif;">Webcam __**=

A **webcam** is a video camera that feeds its images in real time to a computer or a computer network, often via USB, ethernet, or Wi-Fi. Their most popular use is the establishment of video links, permitting computers to act as videophones or video conference stations. This common use as a video camera for the World Wide Web gave the webcam its name. Other popular uses include security surveillance and computer vision and there are also uses on sites like video broadcasting services and for recording social videos. Webcams are known for their low manufacturing cost and flexibility, making them the lowest cost form of video telephony. They have also become a source of security and privacy issues, as some built-in webcams can be remotely activated via spyware.