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) 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) 63 of 74 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)

Graphics software (cont'd)

Paint vs. draw
Paint Draw
Manipulate pixels directly Manipulate geometric primitives, e.g., lines, circles, rectangles, splines, text
Edit by erasing and redoing Edit by adjusting primitives
Save as GIF, PNG, JPEG, TIFF, etc. Save in proprietary format†;
export to GIF, PNG, JPEG, TIFF, etc.
Good for editing scanned images, and for drawings requiring control over individual pixels Good for drawings which are likely to be modified or resized
May also use proprietary format for retaining limited information about objects May permit import of images, for tracing and limited manipulation

† Inkscape's file format is SVG, a W3C standard based on XML. It can be viewed directly in some Web browsers.

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

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