VintaSoft Twain .NET SDK v10.2
Vintasoft.Twain Namespace / Device Class / Brightness Property
Example




In This Topic
    Brightness Property (Device)
    In This Topic
    Gets or sets the brightness of gray/palette/color images for current scan session.
    Syntax
    'Declaration
     
    Public Property Brightness As Single
    'Usage
     
    Dim instance As Device
    Dim value As Single
     
    instance.Brightness = value
     
    value = instance.Brightness
    public float Brightness {get; set;}
    public: __property float get_Brightness();
    public: __property void set_Brightness( 
       float value
    );
    public:
    property float Brightness {
       float get();
       void set (    float value);
    }
    Exceptions
    ExceptionDescription
    Thrown if device is in wrong state.
    Thrown if device does not support capability.
    Thrown if the .NET debugger is used and the function evaluation requires all threads to run.
    Remarks
    Call this property only when device is opened (State == DeviceState.Opened).

    Supported values of brightness can be received by the GetSupportedBrightnessValues method.

    This property has effect only if you do not use User Interface (ShowUI=False).

    This property has effect only for gray/palette/color images. Threshold property must be used for black-white images.
    Example
    This example shows how to adjust brightness/contrast and acquire color images from the device.
    Public Sub ScanColorImageWithBrightness(ByVal device As Device)
        device.ShowUI = False
        device.DisableAfterAcquire = True
                
        device.Open()
        device.PixelType = PixelType.RGB
        device.UnitOfMeasure = UnitOfMeasure.Inches
        device.Resolution = New Resolution(300.0F, 300.0F)
        device.Brightness = 128.0F
        device.Contrast = 0
                
        device.Acquire()
    End Sub
    public void ScanColorImageWithBrightness(Device device)
    {
        device.ShowUI = false;
        device.DisableAfterAcquire = true;
                
        device.Open();
        device.PixelType = PixelType.RGB;
        device.UnitOfMeasure = UnitOfMeasure.Inches;
        device.Resolution = new Resolution(300f, 300f);
        device.Brightness = 128f;
        device.Contrast = 0;
                
        device.Acquire();
    }
    Requirements

    Target Platforms: Windows 8, Windows 7, Windows Vista, Windows XP, Windows Server 2012, Windows Server 2008, Windows Server 2003

    See Also