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參數(shù)資料
| 型號(hào)： | LR38603 |
| 廠商： | Sharp Corporation |
| 元件分類： | 數(shù)字信號(hào)處理 |
| 英文描述： | Digital Signal Processor for Color CCD Cameras |
| 中文描述： | 數(shù)字信號(hào)處理器的彩色CCD相機(jī) |
| 文件頁(yè)數(shù)： | 21/26頁(yè) |
| 文件大?。?/td> | 160K |
| 代理商： | LR38603 |
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LR38603
21
Electronic exposure control data =
[{Weighted data 1
q
x (64 – CW_E (address 13h))
+ Weighted data 2
w
x CW_E}/64
x (256 – P_HEE (address 17h) – P_LEE (address 18h))
+ Top level
e
x P_HEE + Bottom level
r
x
P_LEE]/256
q
Weighted data 1
This comes from the following equation weighting in
horizontal.
Weighting factors are the data from UW_E1
(address 0Bh) to UW_E8 (address 12h).
Weighted data 1 =
{(Y
11
+ Y
12
+ π + Y
18
)/8 x UW_E1 (address 0Bh)
+ (Y
21
+ Y
22
+ π + Y
28
)/8 x UW_E2 (address 0Ch)
:
+ (Y
81
+ Y
82
+ π + Y
88
)/8 x UW_E8 (address
12h)}/256
The sum from UW_E1 to UW_E8 shall be 256.
w
Weighted data 2
Weighting area can be set by the data of CWP_E
(address 14h), CWA_E (address 15h).
Weighting position can be set by the data of
CWP_E.
Weighting area size can be set by the data of
CWA_E.
Weighted data come from averaged data in chosen
area.
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
If white balance control data are less than the data
of AWB_IW_S and AWB_QW_S (address 40h),
then AWB stops.
If white balance control data are less than the data
of AWB_IW_L (address 3Eh) and AWB_QW_L
(address 3Fh) AWB is made active so that white
balance control data are less than the data of
AWB_IW_S and AWB_QW_S.
When the data are greater than AWB_IW_L and
AWB_QW_L, AWB will be active again.
White balance data come 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 – CW_IQ (address 33h))
+ weighted data 4
w
x CW_IQ}/64
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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