How to scan the top part of page?

In This Topic

DeviceImageLayout class allows to control the image layout of the device.

Here is an example that demonstrates how to acquire only the top part of page:

/// <summary>
/// Acquire a part of image.
/// </summary>
public void AcquireImagePart(Vintasoft.Twain.Device device)
{
    // disable UI
    device.ShowUI = false;

    // open the device
    device.Open();
    // specify that black-white images must be acquired
    device.PixelType = Vintasoft.Twain.PixelType.BW;
    // set the inches as unit of measure
    device.UnitOfMeasure = Vintasoft.Twain.UnitOfMeasure.Inches;
    // get current image layout
    System.Drawing.RectangleF imageLayout = device.ImageLayout.Get();
    // set the image layout (get only the top half of the page)
    device.ImageLayout.Set(0, 0, imageLayout.Width, imageLayout.Height / 2); 

    // acquire images asynchronously
    device.Acquire();
}

VB.NET

''' <summary>
''' Acquire a part of image.
''' </summary>
Public Sub AcquireImagePart(ByVal device As Vintasoft.Twain.Device)
    ' disable UI
    device.ShowUI = False

    ' open the device
    device.Open()
    ' specify that black-white images must be acquired
    device.PixelType = Vintasoft.Twain.PixelType.BW
    ' set the inches as unit of measure
    device.UnitOfMeasure = Vintasoft.Twain.UnitOfMeasure.Inches
    ' get current image layout
    Dim imageLayout As System.Drawing.RectangleF = device.ImageLayout.[Get]()
    ' set the image layout (get only the top half of the page)
    device.ImageLayout.[Set](0, 0, imageLayout.Width, imageLayout.Height / 2)

    ' acquire images asynchronously
    device.Acquire()
End Sub

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