kac-9638 ETC-unknow, kac-9638 Datasheet - Page 14

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

IMAGE SENSOR SOLUTIONS
Functional Description
5.3
The timing and control circuit can be programmed to sub-sam-
ple pixels in the display window vertically, horizontally or both,
with an aspect ratio of 4:2 as illustrated in figure 20
Note a:
Note b:
KAC-9638
www.kodak.com/go/imagers 585-722-4385
Vertical
Horizontal
Both
Register
0
1
2
3
4
5
6
7
8
9
0
1
2
3
4
5
6
7
8
9
0
1
2
3
4
5
6
7
8
9
Bit
a b c d e f g h i j k l m n o p q r
a b c d e f g h i j k l m n o p q r
a b c d e f g h i j k l m n o p q r
4:2 Sub-Sampling
Read Out
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).
Figure 20. Example 4:2 Sub-sampling
c) Horizontal & Vertical Sub-Sampling
a) Horizontal Sub-Sampling
VIDCONFIG
Column/Horizontal
b) Vertical Sub-Sampling
Column/Horizontal
1
1
1
Column/Horizontal
Color
1
0
1
VSCAN
VSub
(continued)
Not Read Out
0
1
1
HSCAN
HSub
14
ing is selected, neighboring pixels of the same color in both
directions are combined as shown in figure 23. The value of the
combined pixel is given by
5.4
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 as
shown in the table below:
When vertical 4:2 sub-sampling with averaging is selected,
neighboring pixels in the vertical direction are combined as
shown in figure 21. The value of the combined pixel is given by:
When horizontal 4:2 sub-sampling with averaging is selected,
neighboring pixels of the same color in the horizontal direction
are combined as shown in figure 22. 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 4:2 sub-sampling with averag-
Vertical
Horizontal
Both
Figure 22. 4:2Horizontal Subsampling with Averaging
Figure 21. :4:2 Vertical Sub-Sampling with Averaging
Figure 23. 4:2 Both Subsampling with Averaging
1
4:2 Sub-Sampling with Averaging
Register
2
Bit
V
V
V
V
a
1
1
2
2
1
2
V
V
V
V
H
H
H
H
b
a
1
1
2
2
1
1
1
1
H
H
H
V
V
V
V
H
c
b
1
1
2
2
1
2
1
1
1
1
H
H
1
H
H
V
V
H
H
H
V
V
V
V
d
c
VIDCONFIG
a
1
2
2
+ H
1
2
2
2
1
2
1
1
1
1
1
1
H
V
H
H
H
H
Color
H
H
V
V
V
V
2
V
V
1
e
d
1
b
2
2
2
2
+ V
1
1
2
2
2
1
1
1
1
+ H
+ V
2
V
V
H
V
V
V
1
H
H
H
V
e
H
f
H
c
2
2
1
2
1
2
2
2
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+ V
2
2
1
1
1
1
V
V
H
H
V
V
H
H
H
V
V
H
g
2
d
f
1
2
1
2
1
1
2
1
2
2
2
1
VSCAN
1
0
1
VAvr
V
V
V
V
H
H
H
h
g
H
1
2
1
2
2
2
2
2
H
H
H
H
V
V
V
V
h
i
2
2
2
2
1
1
2
2
V
V
V
V
HSCAN
j
1
2
0
1
1
1
2
HAvr