User Controls
These control the image appearance by adjusting on chip signal processing. Table 3.1
shows the full set of available ‘User’ controls.
Control Name
Min
Max
Step
Default
Brightness
-64
64
1
0
Contrast
0
100
1
50
Saturation
0
100
1
64
Hue
-180
180
1
0
White Balance, Automatic
0
1
1
1
Gamma
100
500
1
300
Power Line Frequency
0
2
1
1
White Balance, Temperature
2800
6500
10
4600
Sharpness
0
100
1
50
Backlight Compensation
0
2
1
0
Table 3.1 ‘User Controls’ for the AF51 Camera. The minimum possible value, maximum possible value and
default setting value are shown as well as the minimum step change that is permitted.
Notes:
The ‘
White Balance, Automatic
’ turns automatic white balance (AWB) on (1) or off (0).
When on, the current value for ‘
White Balance, Temperature
’ will be ignored and cannot
be set. When AWB is turned off, the value currently held in the ‘
White Balance,
Temperature
’ will be applied. Varying that value will vary the white balance setting of the
image.
The value for ‘
Power Line Frequency
’ corresponds to 3 menu options: ‘Disabled’ (0),
‘50 Hz’ (1) and ‘60 Hz’ (2). This works to reduce or eliminate horizontal sinusoidal
intensity fluctuation lines that are sometimes seen with images taken with fast exposure
times using AC filament bulb illumination in older microscopes (figure 3.4).
This will not
completely eliminate AC-type light fluctuations in all circumstances
(for example it
cannot eliminate flickering seen with some fluorescent tube sources – even when that
flickering is regular).
OptArc AF51 Camera Page 25 of 99 User Guide v1.02
