Flashcards in Unit 3 Test CSP Deck (20):
allowing lower level protocols to provide functionality to higher level protocols without needing to know how the lower level works
Examples of Abstraction
HTML works without knowing TCP
data that describes other data
Examples of metadata
dimensions, bits per pixel, number of colors, resolution
a problem solving approach (algorithm) to find a satisfactory solution where finding an optimal or exact solution is impractical or impossible
starts general and then becomes broad
data compression algorithm that allows the compressed data to be perfectly reconstructed
fundamental unit of a digital image
tiny square or dot which contains a single point of color of a larger image
compression scheme in which "useless" information is thrown out in order to reduce the size of the data
What do you gain from lossy?
storage and time
What do you loose from lossy?
resolution, precision with decimals, frequencies
need more hardware to decode lossy
What is lost during lossless compression?
Time and space