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LF2301 Arkusz danych(PDF) 11 Page - LOGIC Devices Incorporated

Numer części LF2301
Szczegółowy opis  Image Resampling Sequencer
Download  18 Pages
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Producent  LODEV [LOGIC Devices Incorporated]
Strona internetowa  http://www.logicdevices.com
Logo LODEV - LOGIC Devices Incorporated

LF2301 Arkusz danych(HTML) 11 Page - LOGIC Devices Incorporated

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DEVICES INCORPORATED
Video Imaging Products
2-11
LF2301
Image Resampling Sequencer
08/16/2000–LDS.2301-H
TABLE 10. ITS OUTPUTS FOR PASS 1 OF TWO-PASS
Cycle
x
y
CAx (HEX)
CAy (HEX)
u
v
INIT
ACC
UWRI
ENDx
ENDy
DONE
1
0
0
00
00
x
x
101000
2
0
0
00
00
x
x
001000
3
0
0
00
00
x
x
001000
4
0
0
00
00
x
x
001000
5
1
0
01
01
x
x
010100
6
2
0
02
02
x
x
011100
7
1
0
00
00
55001100
8
2
0
01
01
55010000
9
3
0
02
02
55011000
10
20
00
00
65001000
11
30
01
01
65010010
12
40
02
02
65011010
13
01
00
00
75001010
14
11
01
01
75010110
15
21
02
02
75011110
16
11
00
00
56001110
17
21
01
01
56010010
18
31
02
02
56011010
19
21
00
00
66001010
20
31
01
01
66010001
21
41
02
02
66011001
22
00
00
00
76001001
23
10
01
01
76010101
24
20
02
02
76011101
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 M1-0 with
“01.” In this example, a horizontal
filter with a kernel size of 3 pixels is
desired. Loading K3-0 with “0010”
selects a kernel size of 3. The first
pixel selected is determined by x0 and
y0. In 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 (F2-0 loaded with “001”).
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
pixel address of the second line is
determined by adding dx/dv to x0
and by adding dy/dv to y0. Since the
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.
TABLE 9. PARAMETER REGISTERS
ADDR
Row (HEX) Column (HEX)
0000
000
000
0001
FFF
FFF
0010
000
000
0011
040
140
0100
000
000
0101
1FF
000
0110
000
000
0111
200
201
1000
000
000
1001
000
000
1010
000
000
1011
000
000
1100
000
000
1101
000
000
1110
005
005
1111
006
006
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.
1 = 1st pixel of 1st walk,
2 = 1st pixel of 2nd walk, etc.
-1
1234
0
1
2
3
123
6
45
7
0
FIGURE 9. PASS 1 OF TWO-PASS


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