BitDepthReductionMode Свойство (Device)

В этом разделе

Gets or sets the bit depth reduction mode of images for current scan session.

Синтаксис

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

'Declaration

Public Property BitDepthReductionMode As BitDepthReductionMode

public BitDepthReductionMode BitDepthReductionMode { get; set; }

public: __property BitDepthReductionMode get_BitDepthReductionMode();
public: __property void set_BitDepthReductionMode(
   BitDepthReductionMode value
);

public:
property BitDepthReductionMode BitDepthReductionMode {
   BitDepthReductionMode get();
   void set(BitDepthReductionMode 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).

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

Пример

This C#/VB.NET code shows how to acquire black-white images from the device.

VB.NET


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

    device.Open()
    device.PixelType = Vintasoft.Twain.PixelType.BW
    device.PixelFlavor = Vintasoft.Twain.PixelFlavor.Chocolate
    device.BitDepthReductionMode = Vintasoft.Twain.BitDepthReductionMode.Threshold
    device.Threshold = 128
    device.UnitOfMeasure = Vintasoft.Twain.UnitOfMeasure.Inches
    device.Resolution = New Vintasoft.Twain.Resolution(200.0F, 200.0F)

    device.Acquire()
End Sub


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

    device.Open();
    device.PixelType = Vintasoft.Twain.PixelType.BW;
    device.PixelFlavor = Vintasoft.Twain.PixelFlavor.Chocolate;
    device.BitDepthReductionMode = Vintasoft.Twain.BitDepthReductionMode.Threshold;
    device.Threshold = 128;
    device.UnitOfMeasure = Vintasoft.Twain.UnitOfMeasure.Inches;
    device.Resolution = new Vintasoft.Twain.Resolution(200f, 200f);

    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

GetSupportedBitDepthReductionModes
Open

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