Basic Computer Notions Graphics

Next Pixels Pixels (cont'd) 2-D graphics resolution 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) 44 of 74 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)

Colour palettes (cont'd)

Various methods are available for dithering. The three images below were created by converting a 24-bit image to 8 bits with no dithering (i.e., using nearest colour), with ordered dithering, and with error-diffusion dithering, respectively.
Example of no dithering Example of ordered dithering Example of error-diffusion dithering

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