color display
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Image is made up of rows of colored pixels, each pixel is made up of a mixture of red, green, and blue. Monitor’s image is refreshed many times per second. By varying the brightness of the three colors, a monitor can display millions of unique colors.
This is the additive color synthesis using RGB color model. The combination of the colors makes white.
This is the additive color synthesis using RGB color model. The combination of the colors makes white.
the real world
Digitizing involves using an input device to take millions of tiny samples.
A representation of the original image can be reconstructed by assembling all samples in sequence.
A representation of the original image can be reconstructed by assembling all samples in sequence.
screen output
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Screen output or monitor one-way window between the user and the computer. Presents all types of graphics and texts.
- Display size measured by the length of diagonal line across screen
- Images composed of tiny dots called pixels.
- Resolution: Measured in dots per inch (dpi)
- Aspect ratio: Relationship between width and height
- Monitors use liquid crystal digital (LCD) technology.
paper output
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Paper output produces a hard copy on paper of any static information that can be displayed on a computer screen.
Impact printers: Form images by physically striking paper, ribbon, and print hammer together
Multifunction Printers: All-in-one devices, device that can serve as a printer, scanner, color photocopy machine, and fax machine.
Impact printers: Form images by physically striking paper, ribbon, and print hammer together
- Line printers
- dot matrix printers
- Laser printers: High-quality pages, quickly
- Inkjet printers: Spray ink directly onto paper
- Photo printers: Specialized inkjets print photos
Multifunction Printers: All-in-one devices, device that can serve as a printer, scanner, color photocopy machine, and fax machine.
output you can hear
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Speakers: playing system sounds and spoken recording from computers
Headphones: high-fidelity music playback; like small speakers but just for one person
Headsets: combine microphones and earphones, useful for telephone and teleconferencing applications
Headphones: high-fidelity music playback; like small speakers but just for one person
Headsets: combine microphones and earphones, useful for telephone and teleconferencing applications