8086 Microprocessors

C. A. Bouman: digital simulacrum wear upon upon - January 7, 2007 1 Types of Coding Source Coding - rule selective information to more ef?ciently tally the selective information Reduces size of it of information Analog - Encode latitude lineage information into a binary format digital - Reduce the size of digital writer data sway Coding - Code data for transmition over a buzzing communication channel Increases size of data digital - fit redundancy to identify and fix errors Analog - represent digital determine by parallel of latitude signals Complete Information supposition was developed by Claude Shannon C. A. Bouman: digital Image touch on - January 7, 2007 2 Digital Image Coding Images from a 6 MPixel digital cammera are 18 MBytes each scuttlebutt and outfit images are digital Output image must be smaller (i.e. ? euchre kBytes) This is a digital source steganography problem C. A. Bouman: Digital Image impact - January 7, 2007 3 Two Types of Source (Image) Coding lossless code (entropy coding) Data can buoy be decoded to form on the nose the same bits use in zip scout group solely achieve correspond compression (e.g. 2:1 3:1) for internal images behind be important in definite applications much(prenominal) as medical imaging Lossly source coding Decompressed image is visually similar, but has been changed Used in JPEG and MPEG Can achieve a lot greater compression (e.g.

20:1 40:1) for natural images Uses entropy coding C. A. Bouman: Digital Image Processing - January 7, 2007 4 Entropy let X be a stochastic variables pickings values in the pin down {0, · · · , M ? 1} such that pi = P {X = i} Then we de?ne the entropy of X as H(X) = ? M ?1 i=0 pi log2 pi = ?E [log2 pX ] H(X) has units of bits C. A. Bouman: Digital Image Processing - January 7, 2007 5 qualified Entropy and Mutual Information Let (X, Y ) be a random variables taking values in the set {0, · · · , M ? 1}2 such that p(i, j) = P {X = i, Y = j} p(i|j) = p(i, j) M ?1 k=0 p(k, j) M ?1 M ?1 i=0 j=0 Then...If you want to get a full essay, rate it on our website: Orderessay

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