input is any data and instructions entered into the memory of a computer. input device is any...
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Input is any data and instructions entered into the memory of a computer.
Input Device is any hardware component that allows users to enter data and instructions into a computer.
1
Input And OutputChap
ter 5
Keyboard and pointing devicespointing devices:
Mouse is a pointing device because it allows a user to control a pointer on the screen.
In GUI, a pointer is a small symbol on the screen whose location and shape change as a user moves a pointing device.
a pointing device can select text, graphics and other objects and click buttons, icons, links and menu commands.
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Input DevicesChap
ter 5
Input Devices
KeyboardCable keyboard
Wireless keyboard
Pointing Devices
MouseMechanical
OpticalTrackball
Touchpad
Pointing Stick
Light Pen
Touch Screen
Pen Input
Audio Input
Digital Camera
Scanner and reading devices
Optical Scanner
Optical Reader
Barcode Reader
RFID reader
Magnetic strip card readers
MIRC reader
Biometric Input Physical
Behavioral
Input Devices Categories
3
Chap
ter 5
There are 2 types: mechanical mouse and
Optical mouse. Mechanical mouse has a rubber or metal
ball on its underside. You should place a mechanical mouse on a mouse
pad. Mouse pad is a rectangular rubber or foam pad
that provides better traction than the top of a desk Optical mouse uses devices that emit and
sense light to detect the mouse’s movement. Some use optical sensors; other use laser.
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MouseChap
ter 5
5
Chap
ter 5
6
Chap
ter 5
Is a stationary pointing
device with a ball on its top or side, Similar to a mechanical mouse that has a ball on the bottom.
To move the pointer using a trackball, you rotate the ball with your thumb, fingers or the palm of your hand.
It has one or more buttons that work just like mouse buttons.
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TrackballChap
ter 5
Is a small, flat, rectangular
pointing device that is sensitive to pressure and motion.
To move the pointer, slide your fingertip across the surface of the pad.
You also can tap the pad’s surface to imitate mouse operations such as clicking.
Around the edge of the pad there are one or more buttons that work like mouse buttons.
Touchpad's are found most often on notebook computers.
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TouchpadChap
ter 5
Is a pressure-sensitive
pointing device shaped like a pencil eraser that is positioned between keys on a keyboard.
To move the pointer you push the pointing stick with a finger.
IBM developed the pointing stick for its notebook computers.
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Pointing StickChap
ter 5
10
Light Pen
Is a handheld pointing device that detect the presence of light.
To select objects on the screen,
a user press the light pen against the surface of the screen
or points the light pen at the screen and then press a button on the pen.
Chap
ter 5
Is an input device that contains keys users
press to enter data and instructions into a computer.
Typing area Numeric keypad Function Keys Media control buttons Internet control
Desktop computer keyboard often attach to the System Unit using
Cable: a serial port or USB port. Without cables :Ir or Bluetooth
Wireless keyboard or cordless keyboard, is a buttery-powered device that transmits data using wireless technology
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The KeyboardChap
ter 5
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Chap
ter 5
Is a touch-sensitive
display device. Users can interact
with these device by touching areas of the screen.
Because touch screens require a lot of arm movements, you do not enter large amounts of data using a touch screen.
Many handheld game consoles have touch screens.
13
Touch screenChap
ter 5
Mobile users often enter
data and instructions with a pen-type device.
With pen input ,users write, draw, and tap on a flat surface to enter input.
The surface maybe a monitor, a screen, a special type of paper or graphic tablet.
14
Pen InputChap
ter 5
Is the process of entering any sound
into the computer such as speech, music, and sound effects.
User enter sound into computer via devices such as
microphones tape players CD/DVD players radios 15
Audio InputChap
ter 5
Digital Cameras
Allows users to take pictures and store the photographed image digitally instead of on traditional film.
They use internal flash memory to store images.
Others store images on mobile storage media, including a flash memory, memory stick and mini CD/DVD.
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Other Types of InputChap
ter 5
A digital
camera's resolution is defined in pixels.
The greater the number of pixels the camera uses to capture an image, the better the quality of the image.
17
Digital CamerasChap
ter 5
Some input devices save time by
capturing data directly from a source document.
1. Optical scanner2. Optical readers3. Bar code readers4. RFID readers5. Magnetic strip card readers6. Magnetic-ink character
recognition reader.18
Scanners and Reading DevicesChap
ter 5
Usually called a scanner
Is a light-sensing input device that reads printed text and graphics and then translates the results into a form the computer can process.
Many scanner include OCR ( optical character recognition ) software, which can read and convert text documents into electronic files.
OCR SW converts a scanned image into a text file that can be edited.
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1 -Optical scanner Chap
ter 5
Is a device that uses a light source to
read characters, marks andcodes and then converts them into
digital data that a computer canprocess.
Two technologies used by optical readers are
A.Optical character recognition.B.Optical mark recognition. 20
2 -Optical ReadersChap
ter 5
Involves reading
handwritten, typewritten or printed text and translating the image into a form the computer can process.
Most OCR devices include a small optical scanner for reading characters and sophisticated SW to analyze what read.
It range from large machines that can read thousands of documents per minute to handheld that read one document at a time.
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A- Optical character recognition (OCR)
Chap
ter 5
22
B- Optical mark recognition (OMR)
Devices read hand-drawn marks such as small circles or rectangles.
One of the most familiar applications of optical mark recognition is the use of pencil bubble optical answer sheets in multiple choice question examinations.
Chap
ter 5
23
3 -Bar Code Readers
also called bar code scanner is an electronic device that
uses laser beams for reading printed barcodes.
Bar code is an identification code that consists of set of vertical lines and spaces of different widths.
The bar code represent the data that identifies the manufacturer and the item.
Chap
ter 5
Radio-frequency identification
readers is a technology that uses radio
signals to communicate with a tag placed in or attached to an object, an animal, or a person.
RFID tags, which contain a memory chip and an antenna, are available in many shapes and size.
RFID reader reads information on the tag via radio waves. It can be handheld devices or mounted in a stationary object such as a doorway.
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4 -RFID ReadersChap
ter 5
Many retailer see RFID
as an alternative to bar code identification because it dose not require direct contact or line-of-site transmission.
Other uses of RFID include tracking times of runners in a marathon; tracking location of soldiers, and airline baggage.
25
RFID ReadersChap
ter 5
Often called a magstripe reader Reads the Magnetic strip on the
back of credit cards or other similar cards.
The strip contains information identifying you.
Some information stored in the strip includes your name, account number, the card expiration date, and a country code.
If the Magnetic strip card readers rejects your card, it is possible that the Magnetic strip is scratched, dirty or erased.
Exposure to magnetic field can erase the contents of a card’s magnetic stripe.
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5 -Magnetic strip card readersChap
ter 5
Magnetic-ink character recognition
Devices read text printed with magnetized ink.
MICR reader converts MIRC characters into a form the computer can process.
The banking industry almost exclusively uses MICR for check processing.
27
6 -MICR Reader Chap
ter 5
Bank routing no. Account no. Check no. Check amount.
Is the technology of
authenticating a person’s identity by verifying a personal characteristic.
Biometric devices grant users access to programs, systems, or rooms by analyzing some physiological or behavioral characteristic.
such as fingerprints, eye patterns, voice patterns, facial features, signatures and hand geometry.
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Biometric InputChap
ter 5
Biometric Input
Fingerprint scanner
Face recognition system
Hand geometry system
Voice verification system
Signature verification system
Iris recognition system
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Chap
ter 5
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