kac-9638 ETC-unknow, kac-9638 Datasheet - Page 13

• Manufacturer Part Number: kac-9638
• Description: Kodak Kac-9638 Cmos Image Sensor
• Manufacturer: ETC-unknow

IMAGE SENSOR SOLUTIONS
Functional Description
5.0
5.1
The timing and control circuit can be programmed to sub-sam-
ple pixels in the “Active Window” vertically, horizontally or both,
with an aspect ratio of 2:1 as illustrated in figure 16.
Note a:
Note b:
KAC-9638
www.kodak.com/go/imagers 585-722-4385
Vertical
Horizontal
Both
Register
Bit
9
SUB-SAMPLING MODES
2:1 Sub-Sampling
0
1
2
3
4
5
6
7
8
9
0
1
2
3
4
5
6
7
8
0
1
2
3
4
5
6
7
8
9
a b c d e f g h i j k l m n o p
The pixel read out will depend on the programmed
scan order as described in section 4.0.
For max FPN performance it is recommended to
always switch on the averaging feature when sub-
sampling (see next section).
a b c d e f g h i j k l l n o p q r
a b c d e f g h i j k l m n o p q r
Figure 16. Example of 2:1 Sub-sampling
Read Out
c) Horizontal & Vertical Sub-Sampling
VIDCONFIG
0
0
0
a) Horizontal Sub-Sampling
Color
Column/Horizontal
b) Vertical Sub-Sampling
Column/Horizontal
Column/Horizontal
1
0
1
VSCAN
VSub
(continued)
Not Read Out
0
1
1
HSCAN
HSub
q r
13
5.2
The timing and control circuit can be programmed to average
neighboring pixels in the analog domain before sub-sampling.
This can be done in the horizontal and vertical direction shown
in the table below
When vertical 2:1 sub-sampling with averaging is selected,
neighboring pixels in the vertical direction are combined as
shown in figure 17. The value of the combined pixel is given by:
When horizontal 2:1 sub-sampling with averaging is selected,
neighboring pixels in the horizontal direction are combined as
shown in figure 18. The value of the combined pixel is given by
ing is selected, neighboring pixels in both directions are com-
bined as shown in figure 19. The value of the combined pixel is
given by
Note that the pixel read out will depend on the programmed
scan order as described in section 4.0.
When both, horizontal & vertical 2:1 sub-sampling with averag-
Vertical
Horizontal
Both
Figure 18. 2:1Horizontal Sub-Sampling with Averaging
Figure 17. :2:1Vertical Sub-Sampling with Averaging
Figure 19. 2:1 Both Subsampling with Averaging
1
1
1
2:1 Sub-Sampling with Averaging
2
2
2
Register
Bit
V
V
V
V
H
H
H
H
H
H
V
V
a
a
a
2
1
2
1
1
1
1
1
1
1
1
1
H
V
V
H
H
H
V
V
V
H
H
V
b
b
2
2
2
1
1
2
2
2
2
2
2
2
V
V
V
V
H
V
V
H
H
H
H
c
c
b
H
1
2
1
2
1
1
1
1
1
1
1
1
H
V
V
H
V
V
H
H
H
1
V
V
H
H
d
d
2
2
VIDCONFIG
2
1
2
2
2
2
2
+ H
2
1
2
0
0
0
H
V
Color
V
V
V
V
H
H
H
H
2
H
e
1
e
c
H
V
V
1
+ V
1
2
1
2
1
1
1
1
2
1
+ H
1
1
1
+ V
2
H
V
V
V
V
H
H
H
V
V
H
H
1
f
f
2
2
1
2
1
2
2
2
2
2
2
2
2
2
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+ V
V
V
V
V
g
g
d
H
H
H
H
V
V
2
H
H
2
1
2
1
1
1
1
1
1
1
1
1
VSCAN
1
0
1
V
V
VAvr
V
V
V
V
H
H
H
H
h
h
H
H
2
2
2
2
1
1
2
2
2
2
2
2
V
V
H
H
H
V
V
H
i
i
H
H
V
V
2
2
1
1
1
1
1
1
1
1
1
1
H
H
H
H
V
V
H
H
V
V
V
V
HSCAN
j
j
e
2
2
2
2
2
2
2
2
0
1
1
1
1
2
2
HAvr