Specifications

91
Focus Adjustment
The CMOS digital camera comes with a focus adjustment function to enable the operator to
capture focused images. This adjustment comes in the form of a fixed-focus switch and an
autofocus feature. The fixed-focus switch enables the application program to switch the focus to
suit the distance to the object being captured.
The autofocus feature automatically adjusts the focus to suit the distance of an object being
captured. Carrying out the autofocus function in preview mode automatically adjusts the lens
position to focus.
Table 2.67
Item Setting Parameter
Fixed-focus switch 20 (close range) to 500 (long range)
Autofocus No settings required
Setting the property of the DirectShow relevant to the Focus Adjustment is as follows.
Set(CameraControl_Focus, SetValue, SetFlag)
Flags to set are as follows.
CameraControl_Flags_Auto
: Auto focus
CameraControl_Flags_Manual
: Fixed focus
Values to set for fixed focus are as follows.
20
: Short range
44
:
74
:
90
:
118
:
140
:
180
:
196
:
300
:
500
: Long range (default)
Device Exclusion Control
This is for carrying out the exclusion process for the following devices that are prohibited from
concurrent use with the digital camera.
Table 2.68
Device Excluded operation
Camera Preview display; still image capture
CMOS Imager CMOS Imager open