AutoBright Свойство (Device)

В этом разделе

Determines that brightness should be automatically detected.

Синтаксис

Visual Basic
C#
Управляемые расширения для C++
C++/CLI

'Declaration

Public Property AutoBright As Boolean

public bool AutoBright { get; set; }

public: __property bool get_AutoBright();
public: __property void set_AutoBright(
   bool value
);

public:
property bool AutoBright {
   bool get();
   void set(bool value);
}

Исключения

Исключение	Описание
TwainInvalidStateException	Thrown if device is in wrong state.
TwainDeviceCapabilityException	Thrown if device does not support capability.
DebuggerException	Thrown if the .NET debugger is used and the function evaluation requires all threads to run.

Ремарки

Call this property only when device is opened (State == DeviceState.Opened).

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.

Пример

This C#/VB.NET code shows how to adjust brightness/contrast and acquire color images from the device.

VB.NET


Public Sub ScanColorImageWithAutoBright(device As Vintasoft.Twain.Device)
    device.ShowUI = False
    device.DisableAfterAcquire = True

    device.Open()
    device.PixelType = Vintasoft.Twain.PixelType.RGB
    device.UnitOfMeasure = Vintasoft.Twain.UnitOfMeasure.Inches
    device.Resolution = New Vintasoft.Twain.Resolution(300.0F, 300.0F)
    device.AutoBright = True
    device.Contrast = 0

    device.Acquire()
End Sub


public void ScanColorImageWithAutoBright(Vintasoft.Twain.Device device)
{
    device.ShowUI = false;
    device.DisableAfterAcquire = true;

    device.Open();
    device.PixelType = Vintasoft.Twain.PixelType.RGB;
    device.UnitOfMeasure = Vintasoft.Twain.UnitOfMeasure.Inches;
    device.Resolution = new Vintasoft.Twain.Resolution(300f, 300f);
    device.AutoBright = true;
    device.Contrast = 0;

    device.Acquire();
}

Требования

Целевые платформы: .NET 9; .NET 8; .NET 7; .NET 6; .NET Framework 4.8, 4.7, 4.6, 4.5, 4.0, 3.5

Смотрите также

Справочник

Device Class
Члены типа Device

Brightness
GetSupportedBrightnessValues
Open
Threshold

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