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參數(shù)資料
| 型號： | LR38269 |
| 廠商： | Sharp Corporation |
| 元件分類： | 數(shù)字信號處理 |
| 英文描述： | Digital Signal Processor for Color CCD Cameras |
| 中文描述： | 數(shù)字信號處理器的彩色CCD相機 |
| 文件頁數(shù)： | 15/20頁 |
| 文件大小： | 93K |
| 代理商： | LR38269 |
Electronic exposure control data comes from below
equation using averaged luminance levels of 64
areas in one image, made by DSP.
Electronic exposure control data =
[{Weighted data 1
q
x (64 – address 10h)
+ weighted data 2
w
x address 10h} ÷ 64
x (256 – address 14h – address 15h)
+ top level
e
x address 14h
+ bottom level
r
x address 15h] ÷ 256
q
Weighted data 1
This comes from the following equation weighting in
horizontal.
Weighting factors are the data from address 08h to
address 0Fh.
{(Y
11
+ Y
12
π + Y
18
) ÷ 8 x address 08h
+ (Y
21
+ Y
22
π + Y
28
) ÷ 8 x address 09h
:
+ (Y
81
+ Y
82
π + Y
88
) ÷ 8 x address 0Fh} ÷ 256
= Weighted data 1
The sum from address 08h to address 0Fh shall be
256.
w
Weighted data 2
Weighting area can be set by the data of address
11h and address 12h. (see
"NOTES" in Gamma
Characteristic Option
)
This comes from the following equation weighting in
selected areas.
(Y
33
+ Y
34
π + Y
66
)/number of areas to be selected
= Weighted data 2
e
Top level : The highest luminance data in one
image by averaging either 4 pixels
or 8 pixels in horizontal.
r
Bottom level : The lowest luminance data in
one image by averaging either 4
pixels or 8 pixels in horizontal.
Auto White Balance Control
White balance control data less than the data of
address 51h and address 52h stops AWB.
White balance control data less than the data of
address 4Fh and address 50h makes AWB active
so that white balance control data is less than the
data of address 51h and address 52h.
In the case of larger than the data of address 4Fh
and address 50h, AWB will be active again.
White balance data comes from the following
equation using averaged I and Q data of 16 areas
in one image.
White balance data =
{Weighted data 3
q
x (64 – address 44h)
+ weighted data 4
w
x address 44h} ÷ 64
LR38269
15
Y
11
Y
21
Y
31
Y
41
Y
51
Y
61
Y
71
Y
81
Y
12
Y
22
Y
32
Y
42
Y
52
Y
62
Y
72
Y
82
Y
13
Y
23
Y
33
Y
43
Y
53
Y
63
Y
73
Y
83
Y
14
Y
24
Y
34
Y
44
Y
54
Y
64
Y
74
Y
84
Y
15
Y
25
Y
35
Y
45
Y
55
Y
65
Y
75
Y
85
Y
16
Y
26
Y
36
Y
46
Y
56
Y
66
Y
76
Y
86
Y
17
Y
27
Y
37
Y
47
Y
57
Y
67
Y
77
Y
87
Y
18
Y
28
Y
38
Y
48
Y
58
Y
68
Y
78
Y
88
I
11
I
21
I
31
I
41
I
12
I
22
I
32
I
42
I
13
I
23
I
33
I
43
I
14
I
24
I
34
I
44
Q
11
Q
21
Q
31
Q
41
Q
12
Q
22
Q
32
Q
42
Q
13
Q
23
Q
33
Q
43
Q
14
Q
24
Q
34
Q
44
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相關代理商/技術參數(shù) |
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