LF2301 LODEV [LOGIC Devices Incorporated], LF2301 Datasheet - Page 11

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

DEVICES INCORPORATED
Pass 1 of Two-Pass Operation
Pass 1 of the two-pass operation
performs horizontal filtering on an
image as shown in Figure 9. This
mode is selected by loading M
“01.” In this example, a horizontal
filter with a kernel size of 3 pixels is
desired. Loading K
selects a kernel size of 3. The first
pixel selected is determined by x
y
(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 (2,0) 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 0. After
the last pixel of the last pixel walk on
the first line has been selected, the first
0
T
. In this example, the first pixel is
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
10. ITS O
2-0
loaded with “001”).
x
0
0
0
0
1
2
1
2
3
2
3
4
0
1
2
1
2
3
2
3
4
0
1
2
3-0
UTPUTS
with “0010”
y
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
0
0
0
F
1-0
CA x (HEX)
OR
0
with
and
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
pixel address of the second line is
determined by adding dx/dv to x
and by adding dy/dv to y
first pixel of the first 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.
1 O
F
-1
0
1
2
3
IGURE
CA y (HEX)
1 = 1st pixel of 1st walk,
2 = 1st pixel of 2nd walk, etc.
F
0
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
1
4
7
WO
9. P
-P
1
2
5
ASS
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
2-11
1 O
2
3
6
F
T
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
0
. Since the
WO
3
-P
ASS
INIT
0
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Image Resampling Sequencer
4
ACC
UMIN and VMIN are both selected to
be 5. UMAX and VMAX are both
selected to be 6. Table 9 shows the
values loaded into all Parameter
Registers. Table 10 shows the ITS
outputs for the Pass 1 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
9. 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
1FF
000
000
040
000
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
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
0
0
0
0
0
R
LF2301
EGISTERS
FFF
000
000
140
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