BitDepthReductionMode Property (Device)

In This Topic

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

Syntax

Visual Basic
C#
Managed Extensions for 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);
}

Exceptions

Exception	Description
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.

Remarks

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

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

Example

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(200F, 200F)

        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();
}

Requirements

Target Platforms: .NET 8, .NET 7; .NET 6; .NET Framework 4.8, 4.7, 4.6, 4.5, 4.0, 3.5

Reference

Device Class
Device Members

GetSupportedBitDepthReductionModes
Open

Send Feedback