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12/3/2013 H.R. Pourreza 1 : زز و ﺣﻤﻴﺪرﺿﺎ ﭘﻮررﺿﺎ ت ﻣﻘﺪﻣﻪ ﻣﺪل ﺧﺮاﺑﻲ ﻛﺎﻫﺶ ﻧﻮﻳﺰ در ﺗﺼﻮﻳﺮ ﺣﺬف ﺧﺮاﺑﻲ در ﺣﺎﻟﺖ ﻋﺪم وﺟﻮد ﻧﻮﻳﺰ ﺣﺬف ﺧﺮاﺑﻲ در ﺣﻀﻮر ﻧﻮﻳﺰ ﺑﺎزﺳﺎزي ﺗﺼﻮﻳﺮH.R. POURREZA 2

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  • 3102/3/21

    1 azerruoP .R.H

    :

    AZERRUOP .R.H

    2222

  • 3102/3/21

    2 azerruoP .R.H

    ::::

    evitcejbus )

    (

    : evitcejbo

    AZERRUOP .R.H

    3333

    % #"

    (gnision-ed) : :

    )y,x( )y,x(h )y,x( +)y,x(f*)y,x(h=)y,x(g

    )y,x(f )y,x(g * h )y,x(f

    )v,u(N+)v,u(F)v,u(H=)v,u(G:

    )y,x( +)y,x(f=)y,x(g)y,x(f*)y,x(h=)y,x(g

    )y,x(+)y,x(f*)y,x(h=)y,x(g

    AZERRUOP .R.H

    4444

  • 3102/3/21

    3 azerruoP .R.H

    % #"

    AZERRUOP .R.H

    5555

    *)( '&:

    ( H) eslupmi h

    .

    .

    ( ) ( ). ( )

    AZERRUOP .R.H

    6666

    0 (,)(,)(,)(,)1

    0

    1

    0axystsxtyNxy

    N

    t

    M

    s

    ==

    =

    =

  • 3102/3/21

    4 azerruoP .R.H

    '& ,+*)( '& 2

    . ])+(,)-([ z % 07. ])2+(,)2-([ z % 59

    AZERRUOP .R.H

    7777

    ()/2 22

    2 ()1

    pi

    =pzez

    '& ,+*)( '&

    AZERRUOP .R.H

    8888

  • 3102/3/21

    5 azerruoP .R.H

    )hgielyaR('& - *)( '&

    :

    b a

    AZERRUOP .R.H

    9999

    2

    . 2L < 2

    2L > 2

    AZERRUOP .R.H

    23232323

    2 (,)(,)[(,)]2

    LL

    = fxygxygxym

    2si ot tes eb 12

    L

  • 3102/3/21

    71 azerruoP .R.H

    `^_O=N Yg \ [Z YXW '&

    AZERRUOP .R.H

    33333333

    `^_O=N Yg \ [Z YXW '&

    yxS : nimZyxS : xamZyxS : demZ)y,x( : yxZ

    yxS : xamS

    AZERRUOP .R.H

    43434343

  • 3102/3/21

    81 azerruoP .R.H

    `^_O=N Yg \ [Z YXW '&

    : nimZ demZ =1A xamZ demZ =2A () ,0 < 2A 0 > 1A

    xamS = 1B

    demZ=

    AZERRUOP .R.H

    53535353

    demZ .

    demZ .

    `^_O=N Yg \ [Z YXW '&

    AZERRUOP .R.H

    63636363

  • 3102/3/21

    91 azerruoP .R.H

    *)( '& KJC \ [Z YXW '& hcton) ( ssapdnab) (tcejerdnab)

    ( retlif

    .

    .

    AZERRUOP .R.H

    73737373

    *)( '& KJC \ [Z YXW '&

    AZERRUOP .R.H

    83838383

    +=

    esiwrehto

    fiDWDuvDWHuv

    12

    (,)2

    00 (,)0

  • 12/3/2013

    H.R. Pourreza 20

    &' WXY Z[ \ CJK &' ()*

    H.R. POURREZA

    39393939

    n

    DvuDWvuD

    vuH 2

    20

    2 ),(),(1

    1),(

    +

    =

    n =1

    &' WXY Z[ \ CJK &' ()*

    H.R. POURREZA

    40404040

    =WvuDDvuD

    evuH ),(),( 202

    1),(

  • 12/3/2013

    H.R. Pourreza 21

    &' WXY Z[ \ CJK &' ()*

    H.R. POURREZA

    41414141

    &' WXY Z[ \ CJK &' ()* :

    H.R. POURREZA

    42424242

    ),(1),( vuHvuH brbp =

  • 3102/3/21

    22 azerruoP .R.H

    *)( '& KJC \ [Z YXW '& : hctoN

    . .

    AZERRUOP .R.H

    34343434

    *)( '& KJC \ [Z YXW '& hctoN

    AZERRUOP .R.H

    44444444

  • 12/3/2013

    H.R. Pourreza 23

    &' WXY Z[ \ CJK &' ()* Notch

    H.R. POURREZA

    45454545

    n=2

    &' WXY Z[ \ CJK &' ()* Notch

    H.R. POURREZA

    46464646

  • 3102/3/21

    42 azerruoP .R.H

    *)( '& KJC \ [Z YXW '& PN RN : hctoN

    AZERRUOP .R.H

    74747474

    = pnrn HuvHuv (,)1(,)

    *)( '& KJC \ [Z YXW '& : hctoN

    AZERRUOP .R.H

    84848484

    PN

    PN

    RN

  • 3102/3/21

    52 azerruoP .R.H

    *)( '& KJC \ [Z YXW '& hctoN

    AZERRUOP .R.H

    94949494

    *)( '& KJC \ [Z YXW '& : hctoN

    .

    AZERRUOP .R.H

    05050505

    = fxygxyxy (,)(,)(,)

    = fxygxyxy (,)(,)(,)= xyTFIHuvGuv (,)(,)(,)} {

  • 3102/3/21

    62 azerruoP .R.H

    *)( '& KJC \ [Z YXW '& : hctoN

    :

    )y,x( )1+b2( )1+a2(

    . )y,x(

    AZERRUOP .R.H

    15151515

    = fxygxywxyxy (,)(,)(,)(,)

    = =

    ++++

    =

    a

    sa

    b

    tbfxsytfxy

    abxy

    2(21()21)(,)(,) 2

    (,)1

    = =

    ++++

    =

    a

    sa

    b

    tbfxsyt

    ab(21()21)(,) fxy

    (,)1

    *)( '& KJC \ [Z YXW '& : hctoN

    :

    AZERRUOP .R.H

    25252525

    (,)(,) ++= wxsytwxyrofasadnabtb

    2

    2

    [(,)(,)(,}](,)(,])

    (21()21)[{(,)(,)1

    gxywxyxy

    wxsytxsyt

    gxsytab

    xya

    sa

    b

    tb

    ++++

    ++++

    == =

    = wxyxywxyxy (,)(,)(,)(,)

  • 12/3/2013

    H.R. Pourreza 27

    &' WXY Z[ \ CJK &' ()* Notch ...

    2(x,y)

    H.R. POURREZA

    53535353

    2

    2

    )},(),(),([)],(),(

    ),({[)12)(12(1),(

    yxyxwyxg

    tysxtysxw

    tysxgba

    yx aas

    b

    bt

    ++++

    ++++

    = =

    =

    0),(),(2

    =

    yxwyx

    ),(),(),(),(),(),(),(

    22 yxyxyxyxgyxyxgyxw

    =

    &' WXY Z[ \ CJK &' ()* Notch ...

    H.R. POURREZA

    54545454

    ),(),(),(),( yxyxwyxgyxf =),( yxw),( yx),( yxg

  • 12/3/2013

    H.R. Pourreza 28

    &' WXY Z[ \ CJK &' ()* Notch ...

    H.R. POURREZA

    55555555

    &' WXY Z[ \ CJK &' ()* Notch ...

    H.R. POURREZA

    56565656

  • 3102/3/21

    92 azerruoP .R.H

    *)( '& KJC \ [Z YXW '& ... hctoN

    AZERRUOP .R.H

    75757575

    fxy (,) gxy (,)215x215:

    51=b=a

    \ i [Z '&

    : : Hb a

    : H

    AZERRUOP .R.H

    85858585

    =+ gxyHfxyxy (,)[(,])(,)

    +=+ HafxybfxyaHfxybHfxy 1212 [(,)(,])[(,])[(,])

    gxyHfxyHfxygxy == (,)[(,])[(,])(,)

  • 3102/3/21

    03 azerruoP .R.H

    \ i [Z '& ...

    . noitulovnoced

    AZERRUOP .R.H

    95959595

    +

    +

    gxyfhxyddxy (,)(,)(,)(,) =+

    (,)(,)(,)(,)(,)(,)*(,)(,)

    GuvHuvFuvNuvgxyhxyfxyxy

    =+

    =+

    VUTSR % #" - \ i [Z '&

    AZERRUOP .R.H

    06060606

  • 3102/3/21

    13 azerruoP .R.H

    VUTSR % #" - \ i [Z '&

    ( )

    .

    AZERRUOP .R.H

    16161616

    AGuv

    = (,)(,) Huv

    VUTSR % #" - \ i [Z '&

    . )y,x(sg

    . )v,u(H

    AZERRUOP .R.H

    26262626

    sfxy (,)

    (,)(,)(,)

    FuvGuv

    Huvs

    s= s

  • 3102/3/21

    23 azerruoP .R.H

    VUTSR % #" - \ i [Z '&

    AZERRUOP .R.H

    36363636

    =+ Huvekuv (,)() 225/6

    : 100.0=k

    : 5200.0=k

    : 52000.0=k

    VUTSR % #" - \ i [Z '&

    )sneL nihT( P P

    AZERRUOP .R.H

    46464646

    snel nihT

    sucof thgiR sucof tfeL

    d retemaid sneLf htgnel lacoF

  • 3102/3/21

    33 azerruoP .R.H

    VUTSR % #" - \ i [Z '&

    )sneL nihT( :

    AZERRUOP .R.H

    56565656

    fuv111

    =+

    v u

    VUTSR % #" - \ i [Z '&

    )y,x(h . )y,x(h . )v,u(H

    AZERRUOP .R.H

    66666666

  • 12/3/2013

    H.R. Pourreza 34

    &' Z[ i \ - "# % RSTUV

    H.R. POURREZA

    67676767

    =T

    dttyytxxfyxg0

    00 )](),([),(

    uaj

    TTuat

    euaua

    T

    dtevuH

    pi

    pi

    pipi

    =

    =

    )sin(

    ),(0

    /2== 0)(/)( 00 tyandTattxif

    dtevuFvuGT

    tvytuxj

    +=

    0

    )]()([2 00),(),( pi

    dtevuHT

    tvytuxj

    +=

    0

    )]()([2 00),( pi

    &' Z[ i \ - "# % RSTUV

    H.R. POURREZA

    68686868

    )()](sin[)(),(vbuajevbua

    vbuaT

    vuH +++

    =pipi

    pi

    == TbttyandTattxif /)(/)( 00

  • 3102/3/21

    53 azerruoP .R.H

    `^_O= lk - \ i [Z '&

    AZERRUOP .R.H

    96969696

    (,)(,)(,)

    HuvGuv

    = Fuv

    (,)(,)(,)(,)

    HuvNuv

    =+ FuvFuv

    F H/N .

    .

    `^_O= lk - \ i [Z '&

    AZERRUOP .R.H

    07070707

    04

    07

    58

  • 3102/3/21

    63 azerruoP .R.H

    (`^_O= sr=)`^_O= qp feol nm - \ i [Z '& .

    AZERRUOP .R.H

    17171717

    = eEff 22 ([)]

    esion dna egamI modnar erassecorp

    . 2e f

    (`^_O= sr=)`^_O= qp feol nm - \ i [Z '&

    AZERRUOP .R.H

    27272727

    (,)(,)(,)/(,)

    (,)(,)

    1

    (,)(,)(,)/(,)

    (,)

    (,)(,)(,)(,)

    (,)(,)(,)

    2

    2

    2

    *

    2

    *

    GuvHuvSuvSuv

    HuvHuv

    GuvHuvSuvSuv

    Huv

    GuvSuvHuvSuv

    HuvSuvFuv

    f

    f

    f

    f

    +=

    +=

    +=

    = SuvNuv (,)(,)2= f SuvFuv (,)(,)2

    .

  • 12/3/2013

    H.R. Pourreza 37

    &' Z[ i \ - mn loef pq =O_^`)=rs =O_^`(

    H.R. POURREZA

    73737373

    ),(),(/),(),(

    ),(),(

    1),( 22

    vuGvuSvuSvuH

    vuHvuH

    vuFf

    +=

    ),(),(

    ),(),(

    1),( 22

    vuGKvuH

    vuHvuH

    vuF

    +=

    &' Z[ i \ - mn loef pq =O_^`)=rs =O_^`(

    H.R. POURREZA

    74747474

    k

  • 12/3/2013

    H.R. Pourreza 38

    &' Z[ i \ - mn loef pq =O_^`)=rs =O_^`(

    H.R. POURREZA

    75757575

    &' Z[ i \ - 8tuvw :

    H.R. POURREZA

    76767676

    =

    =

    =

    =

    = 1

    0

    1

    0

    2

    1

    0

    1

    0

    2

    ),(

    ),(M

    u

    N

    v

    M

    u

    N

    v

    vuN

    vuFSNR

    [ ]=

    =

    =

    1

    0

    1

    0

    2),(),(1M

    u

    N

    v

    yxfyxfMN

    MSE

    [ ]

    =

    =

    =

    =

    = 1

    0

    1

    0

    2

    1

    0

    1

    0

    2

    ),(),(

    ),(M

    u

    N

    v

    M

    u

    N

    v

    yxfyxf

    yxfSNR

  • 3102/3/21

    93 azerruoP .R.H

    AZERRUOP .R.H

    77777777

    noitcejorp-kcaB

    AZERRUOP .R.H

    87878787

    2 1

    23 4 3

  • 3102/3/21

    04 azerruoP .R.H

    AZERRUOP .R.H

    97979797

    2 1

    46 23 4

    )TC(

    AZERRUOP .R.H

    08080808

  • 3102/3/21

    14 azerruoP .R.H

    dyx - ),(

    AZERRUOP .R.H

    18181818

    xy socnis +=

    dyx -

    .

    AZERRUOP .R.H

    28282828

    (,)(,)(socnis) jkkkj gfxyxyydxd =+socnis += xy kkj

    (,)(,)(socnis) gfxyxyydxd =+

    fxy (,)} {

  • 12/3/2013

    H.R. Pourreza 42

    - xyd

    H.R. POURREZA

    83838383

    =

    =

    +=1

    0

    1

    0)sincos(),(),(

    M

    x

    N

    y

    yxyxfg

    - xyd :

    H.R. POURREZA

    84848484

    +

    =

    OtherwiseryxA

    yxf0

    ),(222

    =

    =

    dyyf

    dxdyxyxfg

    ),(

    )(),()0,(

    o

  • 3102/3/21

    34 azerruoP .R.H

    dyx - ... :

    ),(g r>|| r

  • 12/3/2013

    H.R. Pourreza 44

    - xyd (Back-projection)

    H.R. POURREZA

    87878787

    - xyd Fourier-slice

    H.R. POURREZA

    88888888

    = pi degG j2),(),(

    dydxeyxf

    dydxdeyxyxf

    ddydxeyxyxfG

    yxj

    j

    j

    +

    =

    +=

    +=

    )sincos(2

    2

    2

    ),(

    )sincos(),(

    )sincos(),(),(

    pi

    pi

    pi

  • 3102/3/21

    54 azerruoP .R.H

    dyx - ecils-reiruoF

    nis =v soc =u

    :

    )ecilS( :

    AZERRUOP .R.H

    98989898

    pisoc,nis

    (,)(,)2()==

    +

    =

    uv

    Gfxyexdyd jxuyv

    ] [(soc,nis)

    soc,nis (,)(,)

    F

    GFuvuv

    =

    ===

    dyx - ecils-reiruoF

    )ecilS( :

    )v,u(F

    AZERRUOP .R.H

    09090909

  • 3102/3/21

    64 azerruoP .R.H

    dyx - (: )

    ( ) ( ) ||

    AZERRUOP .R.H

    19191919

    pifxyGedd pi

    xy

    j

    0socnis

    (,)(,)2=+

    =

    dyx - ...(: )

    AZERRUOP .R.H

    29292929

  • 3102/3/21

    74 azerruoP .R.H

    dyx - : ...

    AZERRUOP .R.H

    39393939