LEADTOOLS Multimedia (Leadtools.Multimedia assembly)

HueInfo Property

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Example 



Helper property to get the range, default value, and other information for the Hue property.
Syntax
'Declaration
 
Public ReadOnly Property HueInfo As VideoProcAmpInfo
'Usage
 
Dim instance As VideoProcAmp
Dim value As VideoProcAmpInfo
 
value = instance.HueInfo
public VideoProcAmpInfo HueInfo {get;}
public:
property VideoProcAmpInfo^ HueInfo {
   VideoProcAmpInfo^ get();
}

Property Value

A VideoProcAmpInfo object.
Remarks
The information returned for this property is a VideoProcAmpInfo object containing all the related property information.
Example
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Imports Leadtools
Imports Leadtools.Multimedia
Imports LeadtoolsMultimediaExamples.Fixtures

Public _result As Boolean = False
Public _form As CaptureCtrlForm = New CaptureCtrlForm()
Public _videoprocamp As VideoProcAmp
Public _outFile As String = Path.Combine(LEAD_VARS.MediaDir, "VideoProcAmp_SetAutoValueExample.avi")
' this example demonstrates how to set an auto value on the
' video proc amp object.

Public Sub SetManualValueExample()
   ' reference the capture control
   Dim capturectrl As CaptureCtrl = _form.CaptureCtrl

   Try
      ' select the first device with analog in it's name
      ' Replace "Analog" with your video capture device name
      If capturectrl.VideoDevices("Logitech") Is Nothing Then
         Throw New Exception("No Logitech video devices available!")
      End If

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

      ' set a video compressor
      capturectrl.VideoCompressors.Mpeg2.Selected = True

      ' set the target file
      capturectrl.TargetFile = _outFile

      ' reference the video proc amp
      _videoprocamp = capturectrl.VideoProcAmp

      ' try to set the auto value
      If Not _videoprocamp Is Nothing Then
         ' set the saturation to the maximum supported value
         _videoprocamp.Saturation = _videoprocamp.SaturationInfo.Max

         ' set the sharpness to the minimum value
         _videoprocamp.Sharpness = _videoprocamp.SharpnessInfo.Min

         ' set the white balace to the maximum value
         _videoprocamp.WhiteBalance = _videoprocamp.WhiteBalanceInfo.Max

         ' set the hue to the minimum value
         ' later in the timer we will bump this value using the stepDelta
         _videoprocamp.Hue = _videoprocamp.HueInfo.Min

         ' subscribe to the capture progress event 
         ' so we can play with the hue setting above
         AddHandler capturectrl.Progress, AddressOf CaptureCtrl_Progress
      End If

      ' check for video capture available
      If capturectrl.IsModeAvailable(CaptureMode.Video) Then
         ' capture 15 seconds of video
         capturectrl.UseTimeLimit = True
         capturectrl.TimeLimit = 15

         ' subscribe to the compete event
         AddHandler capturectrl.Complete, AddressOf CaptureCtrl_Complete
         ' start the capture
         capturectrl.StartCapture(CaptureMode.Video)
      End If
   Catch e1 As Exception
      _result = False
   End Try

   ' we'll loop on the state and pump messages for this example.
   ' but you should not need to if running from a Windows Forms application.
   Do While capturectrl.State = CaptureState.Running
      Application.DoEvents()
   Loop
End Sub

Private Sub CaptureCtrl_Progress(ByVal sender As Object, ByVal e As ProgressEventArgs)
   If Not _videoprocamp Is Nothing Then
      ' roll the hue value around while capturing
      _videoprocamp.Hue += _videoprocamp.HueInfo.StepDelta

      ' reset it to the minimum if we reach the max
      If _videoprocamp.Hue >= _videoprocamp.HueInfo.Max Then
         _videoprocamp.Hue = _videoprocamp.HueInfo.Min
      End If
   End If
End Sub

Private Sub CaptureCtrl_Complete(ByVal sender As Object, ByVal e As EventArgs)
   ' set the result to what we expect
   _result = File.Exists(_outFile)
End Sub

Public NotInheritable Class LEAD_VARS
Public Const MediaDir As String = "C:\Program Files (x86)\LEAD Technologies\LEADTOOLS 18\Media"
End Class
using Leadtools;
using Leadtools.Multimedia;
using LeadtoolsMultimediaExamples.Fixtures;

public bool _result = false;
public CaptureCtrlForm _form = new CaptureCtrlForm();
public VideoProcAmp _videoprocamp;
public string _outFile = Path.Combine(LEAD_VARS.MediaDir, "VideoProcAmp_SetAutoValueExample.avi");
// this example demonstrates how to set an auto value on the
// video proc amp object.

public void SetManualValueExample()
{
   // reference the capture control
   CaptureCtrl capturectrl = _form.CaptureCtrl;

   try
   {
      // select the first device with analog in it's name
      // Replace "Analog" with your video capture device name
      if (capturectrl.VideoDevices["Logitech"] == null)
         throw new Exception("No Logitech video devices available!");

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

      // set a video compressor
      capturectrl.VideoCompressors.Mpeg2.Selected = true;

      // set the target file
      capturectrl.TargetFile = _outFile;

      // reference the video proc amp
      _videoprocamp = capturectrl.VideoProcAmp;

      // try to set the auto value
      if (_videoprocamp != null)
      {
         // set the saturation to the maximum supported value
         _videoprocamp.Saturation = _videoprocamp.SaturationInfo.Max;

         // set the sharpness to the minimum value
         _videoprocamp.Sharpness = _videoprocamp.SharpnessInfo.Min;

         // set the white balace to the maximum value
         _videoprocamp.WhiteBalance = _videoprocamp.WhiteBalanceInfo.Max;

         // set the hue to the minimum value
         // later in the timer we will bump this value using the stepDelta
         _videoprocamp.Hue = _videoprocamp.HueInfo.Min;

         // subscribe to the capture progress event 
         // so we can play with the hue setting above
         capturectrl.Progress += new ProgressEventHandler(CaptureCtrl_Progress);
      }

      // check for video capture available
      if (capturectrl.IsModeAvailable(CaptureMode.Video))
      {
         // capture 15 seconds of video
         capturectrl.UseTimeLimit = true;
         capturectrl.TimeLimit = 15;

         // subscribe to the compete event
         capturectrl.Complete += new EventHandler(CaptureCtrl_Complete);
         // start the capture
         capturectrl.StartCapture(CaptureMode.Video);
      }
   }
   catch (Exception)
   {
      _result = false;
   }

   // we'll loop on the state and pump messages for this example.
   // but you should not need to if running from a Windows Forms application.
   while (capturectrl.State == CaptureState.Running)
      Application.DoEvents();
}

void CaptureCtrl_Progress(object sender, ProgressEventArgs e)
{
   if (_videoprocamp != null)
   {
      // roll the hue value around while capturing
      _videoprocamp.Hue += _videoprocamp.HueInfo.StepDelta;

      // reset it to the minimum if we reach the max
      if (_videoprocamp.Hue >= _videoprocamp.HueInfo.Max)
         _videoprocamp.Hue = _videoprocamp.HueInfo.Min;
   }
}

void CaptureCtrl_Complete(object sender, EventArgs e)
{
   // set the result to what we expect
   _result = File.Exists(_outFile);
}

static class LEAD_VARS
{
public const string MediaDir = @"C:\Program Files (x86)\LEAD Technologies\LEADTOOLS 18\Media";
}
Requirements

Target Platforms

See Also

Reference

VideoProcAmp Class
VideoProcAmp Members

 

 


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Leadtools.Multimedia requires a Multimedia or Multimedia Suite license and unlock key. For more information, refer to: LEADTOOLS Toolkit Features