. ϳ 
.
G(j,k)=F(J,k)-F(j,k+1)
ϳ 
. :
G(j,k)=F(J,k)-F(j+1,k)
:
1. ϳ
| -2 | ||
| -1 | -1 | -1 |
=
2. ϳ-
| -1 | -2 | |
| -1 | -1 |
=
3. ϳ-
| -1 | -1 | |
| -1 | -2 | |
=
4. ϳ
| -1 | -1 | -1 |
| -2 | ||
=
5. ϳ-
| -1 | -1 | |
| -2 | -1 | |
=
6.
| -1 | ||
| -2 | -1 | |
| -1 |
=
7. ϳ-
| -2 | -1 | |
| -1 | -1 |
=
8.
| -1 | ||
| -1 | -2 | |
| -1 |
=
ϳ , :
F=σ2 F/ σx2+ σ2F/ σy2
:
G(i,j)=[(F(i,j)-F(i+1,j))-(F(i+1,j)-F(i,j))]+[(F(i,j)-F(i,j-1))-(F(i,j+1)-F(i,j))]=
4*F(i,j)-[F(i-1,j)+F(i+1,j)+F(i,j-1)+F(i,j+1)]
:
0-1 0 -1 -1 -1 1 -2 1
Hl1= 1-4 -1 Hl2= -1 8 -1 Hl3= -2 4 -2
0 -1 0 -1 -1 -1 1 -2 1
. 2 2 3 3.
䳺 (j,k) :
II F(j,k) II = GR(j,k)=√[F(j,k)-F(j+1,k+1)]2+[f(j,k+1)-F(j+1,k)]2
䳺 . .
(j,k) , 䳺 (j,k)=0. k k+1 F(j,k) . , j j+1.
:
|
|
|
Ga(j,k)=I F(j,k)-F(j+1,k+1) I + I F(j,k+1)-F(j+1,k)I
GR(j,k)<=Ga(j,k)<=√2*GR(j,k)
³ , , ,
䳺. . , : S(i,j) V(i,j).
F(i,j)=S(i,j)+V(i,j)
, 䳺 F, S.
S(x) F(x)
 | |||
 | |||
o W1 xo W2
, F(x) . F(x) , , , .
:
D(x)=1/W1⌠x+W1 x F(U)du-1/W⌠x x-W2 F(U)du
䳺, . 33:
A0 A1 A2
A7 F(j,k) A3
A6 A5 A4
䳺 :
G(j,k)=√x2+y2 , x=(A2+2A3+A4)-(A0+2A7+A6)
y= (A0+2A1+A2)-(A6+2A5+A4)
:
G(j,k)=(x)+(y)
, , , , ,
G(j,k)=log [F(j,k)]-1/4 log(A1)-1/4 log(A3)-1/4 log(A5)-1/4 log (A7)
, . , , . .
³ , , .
³ , P V- . , . , , W. , WW W. , - :
H(j,k)=Hs(j,k)*HL(j,k)
Hs-,
HL-
, . . , . ˳ :
|
|
|
 |
-1 2 -1 -1 -1 2
1= -1 2 -1 3= -1 2 -1
-1 2 -1 2 -1 -1
-1 -1 -1 2 -1 -1
2= 2 2 2 4= -1 2 -1
-1 -1 -1 -1 -1 2
, , . .
, . .
':
1) ;
2) ;
3)
賿 賿, .
( )
' . - , ' .
, , . ' . ' , . '
