It is used to position or move the curser according to the finger movement on the touchpad. A touchpad is a pointing device featuring a tactile sensor, a specialized surface that can translate the motion and position of a user's fingers to a relative position on screen.
A small rubberized device located in the center of a computer keyboard, which is moved with a finger tip to position a pointer.
The mobile users usually input data and instructions using a device like a pen for writing or drawing on a flat surface Stylus: Stylus is a pointing and drawing device shaped like a pen, and used with a digitizing tablet or touch screen. The stylus point is made of a non scratching plastic to "write" on Personal Digital Assistants (PDAs) or any similar device Screen. The input is given with pressure instead of ink
Digital pen: An input device which captures the handwriting or brush strokes of a user, converts handwritten analog information created using "pen and paper" into digital data, enabling the data to be utilized in various applications. For example, the writing data can be digitized and uploaded to a computer and displayed on its monitor. The data can then be interpreted by handwriting software (OCR) and used in different applications or just as graphics.
The pen input is used with touch screens A graphic tablet can be attached with the computer if touch screen is not available. A graphics tablet (or digitizer, digitizing tablet, graphics pad, drawing 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 gamepad (also called joypad or control pad), is a type of game controller held in two hands, where the digits (especially thumbs) are used to provide input. Gamepads generally feature a set of action buttons handled with the right thumb and a direction controller handled with the left
Output device that uses a steering wheel and a separate set of foot pedals to imitate real world driving
Process of entering any sound into computer is called audio input Audio devices converts sound into a form that can be processed by a computer Sound card is required to enter high quality sound into PC Microphone: is an acoustic-to-electric converter or sensor that converts sound into an electrical signal. MIDI devices: are used to enter music and other sound effects from piano to computer
The process of entering data by speaking into microphone attached to computer Voice recognition/Speech recognition: Ability of a computer to distinguish spoken words Speaker dependent Software: Computer stores the voice patterns of words repeatedly spoken by user Speaker Independent Software: User doesn't train the computer. Software has built in set of word patterns
Digital camera (or digicam): takes video or still photographs, or both, digitally by recording images via an electronic image sensor doesn't require a roll of film Unwanted pictures can be erased preview your photos Quality of digital camera depends upon its resolution Resolution: Image Sharpness
Studio camera: a high-end device for creating electronic moving images Field camera: a view camera that can be folded in a compact size. It has many lenses Point and Shoot camera: A still camera designed primarily for simple operation. Most use autofocus for focusing, automatic systems for setting the exposure options, and have flash units built in.
Process of entering full motion recording into computer Video capture card: An expansion card that converts the analog video signal into digital signal. Types of expansion cards: Frame grabber video card: It captures and converts single frame at a time Full motion video card/ Adapters: Converts 30 frames per second. It gives the effect of a motion picture
Stores its images in real time to a computer or computer network, often via USB, Ethernet, or Wi-Fi. Webcams are known for their low manufacturing cost and flexibility, making them the lowest cost form of video telephony.
Compression decreases the file size, allowing for a reasonable amount of download time or streaming capability but also decreases the quality of the video A video codec is a device or software that enables video compression and/or decompression for digital video Video Decoder decompresses video data Video digitizers captures individual frame from an analog video and saves still picture in file.
Conducting a conference between two or more participants at different sites by using computer networks to transmit audio and video data Videoconferencing is the conduct of a videoconference (also known as a video conference or videoteleconference) by a set of telecommunication technologies which allow two or more locations to interact via two-way video and audio transmissions simultaneously. It has also been called 'visual collaboration' and is a type of groupware.
Captures images from photographic prints, posters, magazine pages, and similar sources for computer editing and display. A device that optically scans images, printed text, handwriting, or an object, and converts it to a digital image. Typical scanners support resolutions of from 300 to 600 dpi. Professional scanner scans at 1200 dpi or higher. Optical Character Recognition software reads the document image and converts it into the text that can be edited in word processor.
Flatbed scanner/ Image scanners, is like a photocopy machine. It consists of a board on which you lay books, magazines, and other documents that you want to scan. Sheet-fed scanners: Similar to flatbed scanners except the document is moved and the scan head is immobile. A sheet-fed scanner looks a lot like a small portable printer. Handheld scanners: use the same basic technology as a flatbed scanner, but rely on the user to move them instead of a motorized belt. This type of scanner typically does not provide good image quality. However, it can be useful for quickly capturing text.
Mark Sensing device The process of capturing human-marked data from document forms such as surveys and tests. It is a device designed to read carefully placed pencil marked answers placed on a form or document.
Magnetic Ink Character Recognition, or MICR, is a character recognition technology used primarily by the banking industry to facilitate the processing of cheques and makes up the routing number and account number at the bottom of a check. MICR (magnetic ink character recognition) is a technology used to verify the legitimacy or originality of paper documents, especially checks.
Radio-frequency identification (RFID) is a technology that uses radio waves to transfer data from an electronic tag, called RFID tag or label, attached to an object, through a reader for the purpose of identifying and tracking the object. The RFID tag includes a small RF transmitter and receiver.
Magnetic stripe card/ swipe card /magstripe: is a type of card capable of storing data on a band of magnetic material on the card. It reads the magnetic stripe on the back of credit cards and bank cards. It is used to identify user, account no, card expiry, country, Card issuing company The magnetic stripe, sometimes, is read by physical contact and swiping past magnetic reading head.
Biometrics are automated methods of recognizing a person based on a physiological or behavioral characteristic. Among the features measured are; facial patterns, fingerprints, hand geometry, handwriting, iris, retinal, vein, DNA, and voice. Biometric device converts personal characteristic in digital code stored in computer.
Finger Print reader Facial recognition system Hand geometry system Voice verification system Signature verification system Iris recognition system Line of sight Systems