ICM202B IC Media, ICM202B Datasheet - Page 7

• Manufacturer Part Number: ICM202B
• Description: CIF/QCIF CMOS image sensor
• Manufacturer: IC Media

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1.5 Auto White Balancing
Due to the different transparency and the overlapping spectrum response of the R, G, and B filters, the
interpolated color may not be balanced. The Auto White Balancing performs the White Balance function
automatically . The following register are used to control the AWB function:
0x33 (AD_AWB_CTRL, Default = 3)
0x34 (AD_AWB_OVERFLOW, Default = 255)
0x35 (AD_AWB_BRIGHT, Default = 0)
When AWB function is disabled, the following registers are used to adjust the White Balance manually:
0x37 (AD_WB_RED, Default = 0x80 )
0x38 (AD_WB_GREEN, Default = 0x80)
0x39 (AD_WB_BLUE, Default = 0x80)
1.6 Sharpening
The following register are used to control the Sharpening function:
0x30 (AD_SHARP_CTRL, Default =9)
0x31 (AD_SHARP_HIGH,Default = 5)
0x32 (AD_SHARP_LOW,Default = 2)
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AD_AWB_BRIGHT, then it will not be used for AWB processing. The default value 0 means there is
0 : Disable Sharpening.
8 : Sharpen Weight = 0.5 (light Sharpening)
9 : Sharpen Weight = 1 (default)
a : Sharpen Weight = 1.5
b : Sharpen Weight = 2
c : Sharpen Weight = 2.5
d : Sharpen Weight = 3
e : Sharpen Weight = 3.5
f : Sharpen Weight = 4 (heavy Sharpening)
Sharpening High Tone Threshold.
0 : Disable AWB
1 : Enable AWB with R,G,B range limited
3 : Enable AWB with no range limited
Set the overflow value of the sampling pixel, if the sampling data is larger than
AD_AWB_OVERFLOW, then it will not be used for AWB processing. The default value 255 means
there is no limit on sampling data.
Set the minimum bright value of the sampling pixel, if the sampling data is less than
no limit on sampling data.
Set the RED Gain manually.
Set the GREEN Gain manually.
Set the BLUE Gain manually.
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ICM202B CIF/QCIF CMOS sensor with digital YUV output
page 7
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Data Sheet V2.0, February 2003
Confidential
2/5/2003