HELP! * GREY=local LOCAL HTML version of Foils prepared July 28,1995
Foil 3 Compressing Still and Moving Images
From Master Foils for HPDC95 Compression Presentation HPDC95 Pentagon City -- August 1,1995. by Roman Markowski and Geoffrey Fox * See also color IMAGE
image 2000x2000x24 bpp = 12MB
one second of NTSC-quality video requires 23 MB
compression - eliminating of redundant or less critical information
Spatial redundancy: values of neighboring pixels are strongly correlated
Spectral redundancy: the spectral values for the same pixel location are correlated
temporal redundancy: frames show very little change in the sequence
decreases the time and cost of transmission and the requirements for storage
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