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? ?: ???

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Title: Author: hongke Last modified by: 10 Created Date: 10/9/2002 2:08:51 PM Document presentation format: Company – PowerPoint PPT presentation

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Tags: coding | huffman

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Title: ? ?: ???


1
??? ????????
  • ???????
  • ? ? ???


  • 2 0 0 3 ? 1 2 ?

2
??? ????????
  • 1 ???????
  • 2 ?????????
  • 3 ????????

3
1? ? ? ? ? ? ?
  • ???????????????????,????????,??, ??????
  • ??????????????, ?????????????

4
2 ? ? ? ? ? ? ? ? ?
5
2 ? ? ? ? ? ? ? ? ?
  • (1)???????????????????.???????????????,???????
    ??.???????,?????, ??????????.?????????????(DPCM).

6
2 ? ? ? ? ? ? ? ? ?
  • (2)????????????,????????, ??,???.
    ?????,???????????, ?????????????. ????,
    ???????????????????????, ????????????????.
    ?????????????. ????, ?????, ????????????????,
    ??????????????????, ?????????????????,
    ??????????????????. ????????K-L??,
    DFT??,Walsh-Hadamard???DCT?.

7
2 ? ? ? ? ? ? ? ? ?
  • (3) ????????????????, ????????(????????)????.???
    ?????Huffman??, ?????. JPEG??DCT, ???Huffman???
  • (4) ????????K?(Kgt2)??????K?????????,
    ????????????, ???????????. ???????????.
    ????????????, ???????????????????????????(?????,
    ??????, ??????????????)??????. ??????????????.

8
2 ? ? ? ? ? ? ? ? ?
  • (5) ???????????????????????,??????????????.??????
    ??????, ?????. JPEG2000???LeGall5/3
    ?Daubechies9/7???
  • ?Shapiro???EZW(embedded zero-tree wavelet)??,
    ???????????, ???????????????????????, ???????.
    ????????????????????????????, ??????????,
    ?????????????, ???????.

9
2 ? ? ? ? ? ? ? ? ?
  • (6) ???????????(???, ?????)????????,????????????
    ?????????.?????????, ?????????????,
    ??????????????????,????????????, ?????????????,
    ???????????????????, ????????????.
    ???????????????.
  • ???????????????????????????, ??????????21?32???
    ?????????????, ??????, ?????????????. ??,
    ??????????????????????????????????,
    ????????????????, ?????????.

10
2 ? ? ? ? ? ? ? ? ?
  • (7) ?????????? ????????????????????????,
    ???????/????. ???????????????????,
    ??????????????,?????????????????.

11
3 ????????
channel
Decoding
  • X
  • x1

DCT
Coding
Subimage Classifiction
???DCT????
12
3 ????????
  • (1)?Lena?????16x16????,????????????????(DCT)

??c(0)1/2,c(k)1 for k1,2.N-1
13
3 ????????
  • (2)??????AC??T?AC?????L

DC?????????? AC??????????? ??AC???????????
??????,??,?????? ??,??????????
14
3 ????????
  • (3)????????(DCL)?????,?????????????,????FAM??

if the jth neuron wins
if the jth neuron loses
15
3 ????????
  • ?????,???????,?(T,L,B)??,??????????.
  • T????AC???,??4???BG,MD, SL?VS
  • L??AC?????, ??2???SM?LG
  • ?????B, ??4??? BG,MD, SL?VS


16
3 ????????
  • Figure 10.2 Fuzzy-set values of fuzzy
    variables T,L,and B.

17
3 ????????
  • ???,???????,?T(0ltTlt100)??????????0,8.76,8.7
    6,16.19,16.19,27.94,27.94,100??????????????
    VS,SL,MD,BG?
  • ?L(0ltLlt100)??????????0,9.88,
    9.88,100,???SM,LG?
  • ?B(0ltBlt4.5)??????????0,8.76,8.76,16.19,16.19
    ,27.94,27.94,100???HI,MH,ML,LO?

18
?????,??FAM??
  • DCL???????256??????????32?FAM???.
    ?????????FAM???, ?????????FAM????FAM???.??,???????
    ??1,2,6,7,8?,?????????3,4,5???????

19
3 ????????
  • (4)??????FAM??,??????????????????????????????????
    ????? ??????????????????
  • ??????????????????,??B??????????????????,????????
    ???

20
??????
FAM Rule 1
FAM Rule 2
???
FAM Rule m
FAM ??
21
3 ????????
  • (5)??????????????,?????4?????????,????????????.??
    ?????AC????,??????????????????????,
    DCT???????,?????????????

22
3 ????????
  • ???????????????????

?? ?????????????
23
3 ????????
  • ???????bits/pixel R




?????????????,N????????
24
3 ????????
  • ?????????FAM?????,FAM???????????????
  • ????Lena ????????????FAM??,?F-16?????????,??????
    ??? 0.5 bits / pixel?,??????,

25
3 ????????
  • FAM?????????



26
? ?
  • FAM????????????,?????????????????,??????????
    ???????,???????????????

27
? ? !
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