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參數(shù)資料
| 型號： | CH5001A |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | CMOS COLOR DIGITAL VIDEO CAMERA |
| 中文描述： | CMOS彩色數(shù)碼攝像機 |
| 文件頁數(shù)： | 29/34頁 |
| 文件大?。?/td> | 136K |
| 代理商： | CH5001A |
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CHRONTEL
CH5001A
201-0000-032 Rev 3.0, 6/2/99
29
Auto-Shutter Black Count Threshold Symbol:ASBC
Address:1Fh
Bits:8
Bits 2-0 of register ASBC determine the black threshold used by the auto-shutter algorithm. The value used is
8*ASBT+3. Bits 7-3 of register ASBC determine the number of pixels below the ASBT level. When the number of
pixels is less than this value, the autoshutter algorithm will adjust the black level downwards. When the number of
pixels is greater than this value, the black level will be adjusted upwards.
Auto-Shutter White Count Threshold
Symbol:ASWC
Address:20h
Bits:8
The number of pixels above the white level is compared to the ASWC value to determine the direction that the
shutter value should be changed.
Electronic Shutter Length Extended Value
Symbol: ESLE
Address:21h
Bits:5
The ESLE register, combined with the ESLH and ESLL registers, determine the length of the electronic shutter.
Table 13. Autoshutter Algorithm Input
ASME
ASCSC
Input to Autoshutter Algorithm
0
0
‘Y[7:0]’ output of color space conversion
0
1
A/D output
1
x
MAX (A/D, Y[7:0])
BIT:
7
6
5
4
3
2
1
0
SYMBOL:
TYPE:
ASBC4
ASBC3
ASBC2
ASBC1
ASBC0
ASBT2
ASBT1
ASBT0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
DEFAULT:
1
1
1
1
1
0
0
1
BIT:
7
6
5
4
3
2
1
0
SYMBOL:
TYPE:
ASWC7
ASWC6
ASWC5
ASWC4
ASWC3
ASWC2
ASWC1
ASWC0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
DEFAULT:
1
0
0
0
0
0
0
0
BIT:
SYMBOL:
7
6
5
4
3
2
1
0
ESLE4
ESLE3
ESLE2
ESLE1
ESLE0
TYPE:
DEFAULT:
R/W
R/W
R/W
R/W
R/W
0
0
0
0
0
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