inputdevices.pptx
- 2. HARDWARE • The Hardware refers to set of all the physical devices attached to computer. • The multimedia project requires : • High speed Processor. • High volume of random access memory and huge storage volumes. • Various input and output devices like Large screen to display, high resolution printers, scanners, optical mouse, touch screen, speaker, card readers etc.
- 3. INPUT DEVICES • Input devices are peripherals used to provide data and control signals to a computer. • The devices which are used to supply input to computer are known as input devices • Input devices allow us to enter raw data for processing. • Computer Input devices acts as a medium of communication and correspondence between computer and the outside world.
- 4. • A wide variety of input devices are used to create and present multimedia projects. • The input devices includes: • Keyboard. • Mouse. • Optical Mouse. • Microphone. • Trackball. • Touch Screen. • Light Pen. • Scanners. • OCR systems. • Digital Cameras.
- 5. KEYBOARD • Keyboard is the most common and popular input device. A standard 104 keys keyboard is most commonly used keyboard. • Numeric keys. • Character keys. • Special keys. • Function keys
- 6. MOUSE • A mouse is a pointing device which is used to supply input through its graphical representations called cursor. • The main goal of any mouse is to translate the motion of your hand into signals that the computer can use.
- 7. TOUCH SCREEN • It is a special input device , which only needs a finger touch to supply input to the system. • Touch screens are the monitors with a special pressure sensitive screen that detects the touch of a finger on a particular point on screen. • Various technologies are used to detect the finger touch on screen.
- 8. • Some touch screens are pressure sensitive which detect the amount of pressure applied on a particular area of screen • Simply, touching and lifting the finger generates the action of single mouse click. • Touching the screen twice, after a short interval generates the action of mouse double click and touching and moving finger without lifting it, generates the action of mouse drag.
- 9. MICROPHONE • Microphone is an input device that used to transfer sound inputs to the computer (electrical signals) . • As more and more people has started using computers for listening or recording music, chatting and teleconferencing, microphone is one of most.
- 10. SCANNERS: • Scanners are input devices of the computer system. • Scanner is an input device, which works more like a photocopy machine. • It is used when some information is available on paper and it is to be transferred to the hard disk of the computer for further manipulation. • .
- 11. • The light and optical sensor reads information about one line of the image at a time. • Scanner captures images from the source which are then converted into a digital form that can be stored on the disk. These images can be edited before they are printed.
- 12. OPTICAL CHARACTER RECOGNITION(OCR): • OCR stands for Optical Character Recognition. It is a widespread technology to recognize text inside images, such as scanned documents and photos. • OCR technology is used to convert virtually any kind of images containing written text (typed, handwritten or printed) into machine-readable text data.
- 13. • OCR additionally works like a scanner which can check documents, pictures, images, hand composed content and furthermore can store in memory.