AT-200CL
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7.2.6 White balance (WB)
The AT-200CL has 4 white balance modes: manual balance, one push auto white balance,
continuous auto white balance and pre-set white balance.
The pre-set white balance can be set to 4000K, 4600K or 5600K.
The white balance of AT-200CL is set under 7800K lighting in factory. If the camera is started
up at the first time, it is 7800K white balance and R and B gain settings are 0.
For executing the white balance, the entire image is divided into 64 areas, 8 for horizontal
and 8 for vertical. The following drawing is an example of using a 2 x 2 area in the image
center.
Continuous
One push
Manual
Tracking range
4,000K to 9,000K
4,000K to 9,000K
4,000K to 9,000K
Adjustable range
-6dB
～
+6dB
-6dB
～
+6dB
-6dB
～
+6dB
Store the setting value
No
Yes
Yes
Note: In continuous mode, if the white part is not enough to make an adjustment, the white balance
may not achieve a proper white color.
Note: The completion of one push auto white requires a maximum of 5 seconds to complete.
7.2.7 Linear matrix (CMTX)
The AT-200CL incorporates a linear color matrix circuit to improve color reproduction.
As this circuit processes signals in the linear stage which is before the gamma correction
circuit, the gamma circuit does not affect color reproduction.
This circuit has:
1. Linear
OFF
2. sRGB
Standard which HP and Microsoft specify for printer and monitor. This preset is
based on this standard.
3. Adobe RGB Standard which Adobe systems specify. This preset is based on this standard.
4. User
User can manipulate R, G and B color relationships based on applications. Set
the gain for R-R, R-G, R-B, G-R, G-G, G-B, B-R, B-G, B-B to adjust.
Important Note:
If sRGB or Adobe RGB is used, please note the following procedure.
1) Achieve the white balance under the condition of D65 (6500K) illumination.
2) Gamma should be set at 0.45 and set the linear matrix at either sRGB or Adobe RGB.
3) Monitor should comply with sRGB or Adobe RGB color reproduction capability.
8
8
Windousize X :2
Window size Y :2
Window offset X :3
Window offset Y : 3
Setting example
Fig.20 White balance measuring
area
