Using Camera Control API you can set the following camera parameters (camera can support only some of them): Pan, Tilt, Roll, Zoom, Exposure, Iris, Focus.
Camera Control API should be used with started camera preview or capture.
On form we using several checkboxes, labels and slider control. You can check Main Demo source code.
int max;
int defaultValue;
int min;
int step;
VFCameraControlFlags flags;
if (VideoCapture1.Video_CaptureDevice_CameraControl_GetRange(
VFCameraControlProperty.Zoom, out min, out max, out step, out defaultValue, out flags))
{
// set slider range
tbCCZoom.Minimum = min;
tbCCZoom.Maximum = max;
tbCCZoom.SmallChange = step;
tbCCZoom.Value = defaultValue;
// set min, max and current values on labels
lbCCZoomMin.Text = "Min: " + Convert.ToString(min);
lbCCZoomMax.Text = "Max: " + Convert.ToString(max);
lbCCZoomCurrent.Text = "Current: " + Convert.ToString(defaultValue);
// set command checkboxes
cbCCZoomManual.Checked = (flags & VFCameraControlFlags.Manual) == VFCameraControlFlags.Manual;
cbCCZoomAuto.Checked = (flags & VFCameraControlFlags.Auto) == VFCameraControlFlags.Auto;
cbCCZoomRelative.Checked = (flags & VFCameraControlFlags.Relative) == VFCameraControlFlags.Relative;
}
If Auto flag set all other flags and values will be ignored.
VFCameraControlFlags flags = VFCameraControlFlags.None;
if (cbCCZoomManual.Checked)
{
flags = flags | VFCameraControlFlags.Manual;
}
if (cbCCZoomAuto.Checked)
{
flags = flags | VFCameraControlFlags.Auto;
}
if (cbCCZoomRelative.Checked)
{
flags = flags | VFCameraControlFlags.Relative;
}
VideoCapture1.Video_CaptureDevice_CameraControl_Set(VFCameraControlProperty.Zoom, tbCCZoom.Value, flags);
