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5 Written questions

5 Matching questions

  1. precision
  2. lossless compression
  3. bit map
  4. vector graphic
  5. bit map disadvantage
  1. a image stored as collection of shapes, each represented by set of numbers defining properties such as coordinates, line thickness, fill colour, layer level
  2. b no resolution information is lost
  3. c accuracy of a floating point value depends on number of bits for mantissa (significant digits)
  4. d resolution dependant (zooming will show pixels), large file size for high resolution / high colour depth, limited editing - pixel operations only
  5. e binary values corresponding to grid of pixels including colour code

5 Multiple choice questions

  1. number of bits used to code a colour, aka colour depth
  2. limit for smallest value (near zero) and largest value on number line depends on number of bits for exponent (moves the point)
  3. photos, images that can't easily be represented as shapes
  4. represents negative and positive numbers in the range -128 to +127
  5. bitmap file size depends on the resolution and the bit depth for pixel colour; (length in pixels) x (breadth in pixels) x (bit depth)

5 True/False questions

  1. 16 bit color256 possible colours

          

  2. Unicodelimit for smallest value (near zero) and largest value on number line depends on number of bits for exponent (moves the point)

          

  3. vector disadvantageimage can scale to any size without increasing file size, shapes are fully editable by amending numbers that represent attributes eg change layer

          

  4. lossy compressionsome resolution data is lost, image quality affected

          

  5. unicode disadvantagelimited types of image possible, drawings only