FocusInfo Property

Visual Basic
C#
C++/CLI

'Declaration
 
Public ReadOnly Property FocusInfo As CameraControlInfo

'Usage
 
Dim instance As CameraControl
Dim value As CameraControlInfo
 
value = instance.FocusInfo

public CameraControlInfo FocusInfo {get;}

public:
property CameraControlInfo^ FocusInfo {
   CameraControlInfo^ get();
}

Property Value

A CameraControlInfo object.

The information returned for this property is a CameraControlInfo object containing all the related property information.

Visual Basic
C#
WinRT C#
WinRT JavaScript
Silverlight C#
Silverlight VB

Copy Code

Imports Leadtools
Imports Leadtools.Multimedia
Imports LeadtoolsMultimediaExamples.Fixtures

Public _result As Boolean = False
Public _form As CaptureCtrlForm = New CaptureCtrlForm()
Public Sub CameraControlExample()
  ' reference the capture control
  Dim capturectrl As CaptureCtrl = _form.CaptureCtrl

  Try
     ' try to find a USB video device, use your device name here
     If capturectrl.VideoDevices("USB") Is Nothing Then
       Throw New Exception("No USB video device available")
     End If

     capturectrl.VideoDevices("USB").Selected = True

     ' reference the camera control
     Dim camera As CameraControl = capturectrl.CameraControl

     If Not camera Is Nothing Then
       ' try to set some camera auto properties
       camera.AutoExposure = True
       camera.AutoFocus = True
       camera.AutoIris = True
       camera.AutoPan = False
       camera.AutoRoll = False
       camera.AutoTilt = False
       camera.AutoZoom = True

       ' now try to set some camera manual properties
       camera.Exposure = camera.ExposureInfo.Min
       camera.Focus = camera.FocusInfo.Max
       camera.Iris = camera.IrisInfo.Default
       camera.Pan = camera.PanInfo.Min
       camera.Roll = camera.RollInfo.Min
       camera.Tilt = camera.TiltInfo.Min
       camera.Zoom = camera.ZoomInfo.Min

       ' now increment a property by the stepping delta
       camera.Exposure += camera.ExposureInfo.StepDelta

       ' set the result to what we expect
       _result = (camera.Exposure = camera.ExposureInfo.Min + camera.ExposureInfo.StepDelta)

       ' now check a property to see if it is supported and has a manual setting
       ' if so, set it to auto
       If camera.ExposureInfo.Flags <> CameraControlFlags.Unsupported AndAlso camera.ExposureInfo.Flags = CameraControlFlags.Manual Then
         camera.AutoExposure = True
       End If

       ' set the result to what we expect
       _result = _result And (camera.ExposureInfo.Flags = CameraControlFlags.Auto)
     End If

     ' continue setting capture settings
     ' and possibly start a capture process
     ' ...
  Catch e1 As Exception
     _result = False
  End Try
End Sub

using Leadtools;
using Leadtools.Multimedia;
using LeadtoolsMultimediaExamples.Fixtures;

public bool _result = false;
public CaptureCtrlForm _form = new CaptureCtrlForm();
public void CameraControlExample()
{
   // reference the capture control
   CaptureCtrl capturectrl = _form.CaptureCtrl;

   try
   {
      // try to find a USB video device. use your device's name here
      if (capturectrl.VideoDevices["USB"] == null)
         throw new Exception("No USB video device available");

      capturectrl.VideoDevices["USB"].Selected = true;

      // reference the camera control
      CameraControl camera = capturectrl.CameraControl;

      if (camera != null)
      {
         // try to set some camera auto properties
         camera.AutoExposure = true;
         camera.AutoFocus = true;
         camera.AutoIris = true;
         camera.AutoPan = false;
         camera.AutoRoll = false;
         camera.AutoTilt = false;
         camera.AutoZoom = true;

         // now try to set some camera manual properties
         camera.Exposure = camera.ExposureInfo.Min;
         camera.Focus = camera.FocusInfo.Max;
         camera.Iris = camera.IrisInfo.Default;
         camera.Pan = camera.PanInfo.Min;
         camera.Roll = camera.RollInfo.Min;
         camera.Tilt = camera.TiltInfo.Min;
         camera.Zoom = camera.ZoomInfo.Min;

         // now increment a property by the stepping delta
         camera.Exposure += camera.ExposureInfo.StepDelta;

         // set the result to what we expect
         _result = (camera.Exposure == camera.ExposureInfo.Min + camera.ExposureInfo.StepDelta);

         // now check a property to see if it is supported and has a manual setting
         // if so, set it to auto
         if (camera.ExposureInfo.Flags != CameraControlFlags.Unsupported
            && camera.ExposureInfo.Flags == CameraControlFlags.Manual)
            camera.AutoExposure = true;

         // set the result to what we expect
         _result &= (camera.ExposureInfo.Flags == CameraControlFlags.Auto);
      }

      // continue setting capture settings
      // and possibly start a capture process
      // ...
   }
   catch (Exception)
   {
      _result = false;
   }
}

Target Platforms

Reference

CameraControl Class
CameraControl Members