LF2301 LODEV [LOGIC Devices Incorporated], LF2301 Datasheet - Page 12

• Manufacturer Part Number: LF2301
• Description: Image Resampling Sequencer
• Manufacturer: LODEV [LOGIC Devices Incorporated]

DEVICES INCORPORATED
Pass 2 of Two-Pass Operation
Pass 2 of the two-pass operation
performs vertical filtering on an image
as shown in Figure 10. This mode is
selected by loading M
this example, a vertical filter with a
kernel size of 3 pixels is desired.
Loading K
kernel size of 3. The first pixel se-
lected is determined by x
this example, the first pixel is (0,0). In
this case, the LF2301s should address
consecutive pixels during each pixel
walk. For this to occur, FOV must be
set to 1 (F
After the last pixel of a pixel walk has
been selected, the next pixel address
is determined by adding dx/du to the
current X address and by adding
dy/du to the current Y address
(unless the kernel just completed was
the last for that line). At the end of
the first pixel walk, pixel (0,2) is
addressed. Since the first pixel of the
next pixel walk should be (1,0), dx/du
is selected to be 1 and dy/du is selected
to be -2. After the last pixel of the last
pixel walk on the first line has been
T
ABLE
Cycle
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
1
2
3
4
5
6
7
8
9
12. ITS O
2-0
3-0
loaded with “001”).
with “0010” selects a
x
0
0
0
0
0
0
1
1
1
2
2
2
0
0
0
1
1
1
2
2
2
0
0
0
UTPUTS
1-0
y
0
0
0
0
1
2
0
1
2
0
1
2
1
2
3
1
2
3
1
2
3
0
1
2
with “11.” In
0
and y
F
CA x (HEX)
OR
0
. In
00
00
00
00
01
02
00
01
02
00
01
02
00
01
02
00
01
02
00
01
02
00
01
02
P
ASS
selected, the first pixel address of the
second line is determined by adding
dx/dv to x
y
pixel walk on the second line should be
(0,1), dx/dv is selected to be 0 and
dy/dv is selected to be 1. Second
order differential terms are not used
in this filter and are therefore set to 0.
2 O
0
F
. Since the first pixel of the first
0
1
2
3
4
IGURE
CA y (HEX)
1 = 1st pixel of 1st walk,
2 = 1st pixel of 2nd walk, etc.
F
-1
00
00
00
00
01
02
00
01
02
00
01
02
00
01
02
00
01
02
00
01
02
00
01
02
T
WO
10. P
0
-P
and by adding dy/dv to
0
ASS
1
4
ASS
u
x
x
x
x
x
x
5
5
5
6
6
6
7
7
7
5
5
5
6
6
6
7
7
7
2-12
1
2 O
2
5
F
v
5
5
5
5
5
5
5
5
5
6
6
6
6
6
6
6
6
6
x
x
x
x
x
x
T
2
WO
3
-P
INIT
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
ASS
Image Resampling Sequencer
3
ACC
UMIN and VMIN are both selected to
be 5. UMAX and VMAX are both
selected to be 6. Table 11 shows the
values loaded into all Parameter
Registers. Table 12 shows the ITS
outputs for the Pass 2 of a Two-Pass
operation.
ADDR Row (HEX) Column (HEX)
0
0
0
0
1
1
0
1
1
0
1
1
0
1
1
0
1
1
0
1
1
0
1
1
T
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
ABLE
Video Imaging Products
UWRI
11. P
1
1
1
1
0
1
1
0
1
1
0
1
1
0
1
1
0
1
1
0
1
1
0
1
FFF
0C0
000
000
000
101
000
200
000
000
000
000
000
000
005
006
ARAMETER
END x
0
0
0
0
1
1
1
0
0
0
0
0
0
1
1
1
0
0
0
0
0
0
1
1
END y
08/16/2000–LDS.2301-H
R
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
0
0
0
0
0
EGISTERS
LF2301
FFF
1C0
1FE
000
000
000
000
201
000
000
000
000
000
000
005
006
DONE
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1