Basic Computer Notions Graphics

Next Pixels Pixels (cont'd) 3 of 74 2-D graphics resolution (cont'd) Cathode-ray tube LCD Plasma E-paper Generation of raster-scan images Generation of raster-scan images (cont'd) Refresh rate Generation of straight lines Generation of straight lines (cont'd) Generation of straight lines (cont'd) Generation of straight lines (cont'd) Generation of straight lines (cont'd) Generation of straight lines (cont'd) Generation of straight lines (cont'd) Generation of straight lines (cont'd) Generation of straight lines (cont'd) Generation of straight lines (cont'd) Generation of straight lines (cont'd) Generation of straight lines (cont'd) Generation of straight lines (cont'd) Generation of straight lines (cont'd) Generation of straight lines (cont'd) Generation of straight lines (cont'd) Generation of straight lines (cont'd) Generation of straight lines (cont'd) Generation of straight lines (cont'd) Graphics primitives Graphics processing units Subtractive Additive Colour display Colour display (cont'd) Colour display (cont'd) Colour palettes Colour palettes (cont'd) Colour palettes (cont'd) Colour palettes (cont'd) Colour palettes (cont'd) Colour palettes (cont'd) Colour palettes (cont'd) Colour palettes (cont'd) Colour gamut Colour gamut (cont'd) Colour gamut (cont'd) Colour gamut (cont'd) Colour gamut (cont'd) Character codes Graphics formats TIFF format DICOM format Common Web formats Lossless compression Lossy compression Lossy compression (cont'd) Lossy compression (cont'd) Lossy compression (cont'd) Graphics software Graphics software (cont'd) Graphics software (cont'd) Graphics software (cont'd) Graphics software (cont'd) Video Principle of tomography Principle of tomography (cont'd) Levels of detail Levels of detail (cont'd) Levels of detail (cont'd) Image segmentation Image analysis Image analysis (cont'd)

2-D graphics resolution

No. pixels
horizontally		No. pixels
vertically		No. bits
per pixel 		Total no.
Mbits
Telephone1 black & white 96 65 1  
Palm/pocket2 8-bit colour 160 160 8 0.2
16-bit colour 320 240 16 1.2
16-bit colour 640 240 16 2.4
X-ray CT gray-level 512 5128 2
SVGA3 8-bit colour 800 600 8 4
Laser printer4 low-resolution black & white 3300 2550 1 8
Workstation 24-bit colour 1600 120024 46
Digital camera 5 Mpixels 24-bit colour 2560 192024 118
X-ray film gray-level 4000 400012 192
35-mm film 30-bit colour 4000 300030 360
Digital camera 11 Mpixels 36-bit colour 4064 270436 396
Typography5 high-resolution black & white 2800021000 1 588
70-mm film 30-bit colour 6000 460030 830

1 Nokia 7110 is 96×65, Ericsson R320s is 101×65, both include Web browsers.

2 PalmOS-based PDA's have 160×160 screens. The Nokia 9000i telephone-cum-PDA has a 640×200 screen in addition to a small telephone-type screen. WindowsCE-based handheld computers typically have 640×240 screens.

3 CGA = 640×200×1, EGA = 640×350×4, VGA = 640×480×4, XGA = 1024×768.

4 At 300 dpi. Many printers are now 600 dpi or higher.

5 Approx. 11"×8.25" at 2540 dpi, black and white.

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Last modified: Tue, 2007 Mar 20 17:33:24

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