Performance
Automatic mode
Processing time
The processing time is strictly related to the AWB ROI area, according to the following formula:
AWB processing time [ms] = ( AWB ROI area [pixels] / 200000 ) + 0.2
Processing time for various AWB ROI sizes
AWB ROI width |
AWB ROI height |
AWB ROI area |
AWB processing time |
32 |
8 |
256 |
0.2 |
640 |
480 |
307,200 |
1.7 |
768 |
576 |
442,368 |
2.4 |
1024 |
1024 |
1,048,576 |
5.4 |
1600 |
1200 |
1,920,000 |
9.8 |
2048 |
2048 |
4,194,304 |
21.2 |
4096 |
4096 |
16,777,216 |
84.1 |
Color balance accuracy
The color balance accuracy depends mainly on external factors, such as the quality of the calibration target and the image source equipment. Assuming these factors are optimal, the white balance calibrator estimates the gains with an accuracy better than 1/1000.
Adaptive calibration
In continuous mode, the white balance calibrator is able to track the variations of the color balance. Small measured gain variations from image to image are damped to avoid flicker. Large measured gain variations from image to image are immediately compensated.
Adaptive calibration properties |
Min |
Typ |
Max |
Damping factor for small changes |
– |
4 |
– |
Range of small measured gain variations |
-0.025 |
– |
0.025 |
Manual mode
Manual gain accuracy
Manual gain properties |
Min |
Typ |
Max |
Units |
Gain range |
1 |
– |
10 |
– |
Gain steps |
– |
0.001 |
– |
– |
Gain error |
-0.00025 |
– |
0.00025 |
– |