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ICM205B Datasheet(PDF) 10 Page - List of Unclassifed Manufacturers

Part No. ICM205B
Description  VGA/QVGA CMOS image sensor with digital YUV output
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Maker  ETC1 [List of Unclassifed Manufacturers]
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ICM205B Datasheet(HTML) 10 Page - List of Unclassifed Manufacturers

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ICM205B: VGA CMOS sensor with digital YUV output
Data Sheet V1.3, Oct. 2002
©2000, 2001, 2002 IC Media Corporation & IC Media Technology Corp.
10/16/2002
web site: http://www.ic-media.com/
web site: http://www.ic-media.com.tw/
page 10
10
Color saturation control
The color saturation can be enhanced by adjusting the Saturation Factor register 0x2D
(AD_SATURATION, Default = 0x30).
The following examples show how to set the Saturation to 0, 1, 1.5, and 2:
Saturation 0 : AD_SATURATION = 0x00, no color (B/W)
1 : AD_SATURATION = 0x20
1.5: AD_SATURATION = 0x30
2.0: AD_SATURATION = 0x40
Gamma Correction
To boost darker signal to match the video monitor characteristic, gamma correction are performed:
where Vi is normalized (ranged from 0 to 1) R, G, or B signal coming from the white balancing module,
and Vo is normalized final output. The Gamma values (parameter
γ) are provided in 205B, use register
0x2c (AD_GAMMA) to select one of them:
AD_GAMMA 0 : Gamma = 1 (no Gamma)
AD_GAMMA 1 : Gamma = 1.3
AD_GAMMA 2 : Gamma = 1.5
AD_GAMMA 3 : Gamma = 1.7
AD_GAMMA 4 : Gamma = 1.9
AD_GAMMA 5 : Gamma = 2.2
AD_GAMMA 6 : Gamma = 2.5
Brightness
The Brightness offset can be adjusted by Brightness Offset register 0x2B (AD
_BRIGHT_OFFSET,
Default =0). The default value =0 means the Brightness is not adjusted.
The following examples show how to increase/decrease the Brightness Level:
Increase Brightness by 10: AD_BRIGHT_OFFSET = 0x0A
Decrease Brightness by10: AD_BRIGHT_OFFSET = 0x8A
γ
/
1
i
o
V
V
=


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