VintaSoft Twain .NET SDK 14.1: Руководство для .NET разработчика
Vintasoft.Sane Namespace / SaneAcquiredImage Class
Члены типа Объект Синтаксис Example Иерархия Требования Смотрите также
В этом разделе
    Класс SaneAcquiredImage
    В этом разделе
    Представляет изображение, полученное с SANE устройства.
    Объектная модель
    SaneAcquiredImage
    Синтаксис
    'Declaration
    
    Public NotInheritable Class SaneAcquiredImage
    
    
    public sealed class SaneAcquiredImage
    
    
    public __gc __sealed class SaneAcquiredImage
    
    
    public ref class SaneAcquiredImage sealed
    
    
    Пример

    Вот C#/VB.NET код, который демонстрирует, как получить изображения с SANE устройства и обработать изображения.

    
    ''' <summary>
    ''' Acquires images from SANE device and processes images.
    ''' </summary>
    Public Sub AcquireImagesFromSaneDeviceAndProcessImages()
            ' create SANE device manager
            Using deviceManager As New Vintasoft.Sane.SaneLocalDeviceManager()
                    ' open SANE device manager
                    deviceManager.Open()
    
                    ' get count of SANE devices
                    Dim deviceCount As Integer = deviceManager.Devices.Count
                    If deviceCount = 0 Then
                            System.Console.WriteLine("Devices are not found.")
                            Return
                    End If
    
                    ' select the first SANE device
                    Dim device As Vintasoft.Sane.SaneLocalDevice = deviceManager.Devices(0)
    
                    ' open SANE device
                    device.Open()
    
                    Dim acquiredImage As Vintasoft.Sane.SaneAcquiredImage
                    Do
                            Try
                                    ' acquire image from SANE device
                                    acquiredImage = device.AcquireImageSync()
                                    ' if image is received
                                    If acquiredImage IsNot Nothing Then
                                            System.Console.WriteLine("Image is acquired.")
    
                                            ' process acquired image
                                            ProcessSaneAcquiredImage(acquiredImage)
                                    Else
                                            ' if image is not received
                                            System.Console.WriteLine("Scan is completed.")
                                            Exit Try
                                    End If
                            Catch ex As System.Exception
                                    System.Console.WriteLine(String.Format("Scan is failed: {0}", ex.Message))
                                    Exit Try
                            End Try
                    ' while device has more images to scan
                    Loop While device.HasMoreImagesToScan
    
                    ' close SANE device
                    device.Close()
    
                    ' close SANE device manager
                    deviceManager.Close()
            End Using
    
            System.Console.ReadLine()
    End Sub
    
    ''' <summary>
    ''' Processes image, which is acquired from SANE device.
    ''' </summary>
    Private Sub ProcessSaneAcquiredImage(acquiredImage As Vintasoft.Sane.SaneAcquiredImage)
            Try
                    ' subscribe to the processing events
                    AddHandler acquiredImage.Processing, New System.EventHandler(Of Vintasoft.Sane.ImageProcessing.SaneAcquiredImageProcessingEventArgs)(AddressOf acquiredImage_Processing)
                    AddHandler acquiredImage.Progress, New System.EventHandler(Of Vintasoft.Sane.ImageProcessing.SaneAcquiredImageProcessingProgressEventArgs)(AddressOf acquiredImage_Progress)
                    AddHandler acquiredImage.Processed, New System.EventHandler(Of Vintasoft.Sane.ImageProcessing.SaneAcquiredImageProcessedEventArgs)(AddressOf acquiredImage_Processed)
    
                    ' despeckle image
                    acquiredImage.Despeckle(8, 25, 30, 400)
                    ' deskew image
                    acquiredImage.Deskew(Vintasoft.Sane.ImageProcessing.SaneBorderColor.AutoDetect, 1, 1)
                    ' detect border of image
                    acquiredImage.DetectBorder(5)
            Catch ex As System.Exception
                    System.Console.WriteLine("Error: " & ex.Message)
            Finally
                    ' unsubscribe from the processing events
                    RemoveHandler acquiredImage.Processing, New System.EventHandler(Of Vintasoft.Sane.ImageProcessing.SaneAcquiredImageProcessingEventArgs)(AddressOf acquiredImage_Processing)
                    RemoveHandler acquiredImage.Progress, New System.EventHandler(Of Vintasoft.Sane.ImageProcessing.SaneAcquiredImageProcessingProgressEventArgs)(AddressOf acquiredImage_Progress)
                    RemoveHandler acquiredImage.Processed, New System.EventHandler(Of Vintasoft.Sane.ImageProcessing.SaneAcquiredImageProcessedEventArgs)(AddressOf acquiredImage_Processed)
            End Try
    End Sub
    
    ''' <summary>
    ''' Image processing is started.
    ''' </summary>
    Private Sub acquiredImage_Processing(sender As Object, e As Vintasoft.Sane.ImageProcessing.SaneAcquiredImageProcessingEventArgs)
            System.Console.Write(e.Action.ToString() & " ")
    End Sub
    
    ''' <summary>
    ''' Image processing is in progress.
    ''' </summary>
    Private Sub acquiredImage_Progress(sender As Object, e As Vintasoft.Sane.ImageProcessing.SaneAcquiredImageProcessingProgressEventArgs)
            System.Console.Write(".")
    End Sub
    
    ''' <summary>
    ''' Image processing is finished.
    ''' </summary>
    Private Sub acquiredImage_Processed(sender As Object, e As Vintasoft.Sane.ImageProcessing.SaneAcquiredImageProcessedEventArgs)
            System.Console.WriteLine(" finished")
    End Sub
    
    
    
    /// <summary>
    /// Acquires images from SANE device and processes images.
    /// </summary>
    public void AcquireImagesFromSaneDeviceAndProcessImages()
    {
        // create SANE device manager
        using (Vintasoft.Sane.SaneLocalDeviceManager deviceManager = new Vintasoft.Sane.SaneLocalDeviceManager())
        {
            // open SANE device manager
            deviceManager.Open();
    
            // get count of SANE devices
            int deviceCount = deviceManager.Devices.Count;
            if (deviceCount == 0)
            {
                System.Console.WriteLine("Devices are not found.");
                return;
            }
    
            // select the first SANE device
            Vintasoft.Sane.SaneLocalDevice device = deviceManager.Devices[0];
    
            // open SANE device
            device.Open();
    
            Vintasoft.Sane.SaneAcquiredImage acquiredImage;
            do
            {
                try
                {
                    // acquire image from SANE device
                    acquiredImage = device.AcquireImageSync();
                    // if image is received
                    if (acquiredImage != null)
                    {
                        System.Console.WriteLine("Image is acquired.");
    
                        // process acquired image
                        ProcessSaneAcquiredImage(acquiredImage);
                    }
                    // if image is not received
                    else
                    {
                        System.Console.WriteLine("Scan is completed.");
                        break;
                    }
                }
                catch (System.Exception ex)
                {
                    System.Console.WriteLine(string.Format("Scan is failed: {0}", ex.Message));
                    break;
                }
            }
            // while device has more images to scan
            while (device.HasMoreImagesToScan);
    
            // close SANE device
            device.Close();
    
            // close SANE device manager
            deviceManager.Close();
        }
    
        System.Console.ReadLine();
    }
    
    /// <summary>
    /// Processes image, which is acquired from SANE device.
    /// </summary>
    private void ProcessSaneAcquiredImage(Vintasoft.Sane.SaneAcquiredImage acquiredImage)
    {
        try
        {
            // subscribe to the processing events
            acquiredImage.Processing += new System.EventHandler<Vintasoft.Sane.ImageProcessing.SaneAcquiredImageProcessingEventArgs>(acquiredImage_Processing);
            acquiredImage.Progress += new System.EventHandler<Vintasoft.Sane.ImageProcessing.SaneAcquiredImageProcessingProgressEventArgs>(acquiredImage_Progress);
            acquiredImage.Processed += new System.EventHandler<Vintasoft.Sane.ImageProcessing.SaneAcquiredImageProcessedEventArgs>(acquiredImage_Processed);
    
            // despeckle image
            acquiredImage.Despeckle(8, 25, 30, 400);
            // deskew image
            acquiredImage.Deskew(Vintasoft.Sane.ImageProcessing.SaneBorderColor.AutoDetect, 1, 1);
            // detect border of image
            acquiredImage.DetectBorder(5);
        }
        catch (System.Exception ex)
        {
            System.Console.WriteLine("Error: " + ex.Message);
        }
        finally
        {
            // unsubscribe from the processing events
            acquiredImage.Processing -= new System.EventHandler<Vintasoft.Sane.ImageProcessing.SaneAcquiredImageProcessingEventArgs>(acquiredImage_Processing);
            acquiredImage.Progress -= new System.EventHandler<Vintasoft.Sane.ImageProcessing.SaneAcquiredImageProcessingProgressEventArgs>(acquiredImage_Progress);
            acquiredImage.Processed -= new System.EventHandler<Vintasoft.Sane.ImageProcessing.SaneAcquiredImageProcessedEventArgs>(acquiredImage_Processed);
        }
    }
    
    /// <summary>
    /// Image processing is started.
    /// </summary>
    private void acquiredImage_Processing(object sender, Vintasoft.Sane.ImageProcessing.SaneAcquiredImageProcessingEventArgs e)
    {
        System.Console.Write(e.Action.ToString() + " ");
    }
    
    /// <summary>
    /// Image processing is in progress.
    /// </summary>
    private void acquiredImage_Progress(object sender, Vintasoft.Sane.ImageProcessing.SaneAcquiredImageProcessingProgressEventArgs e)
    {
        System.Console.Write(".");
    }
    
    /// <summary>
    /// Image processing is finished.
    /// </summary>
    private void acquiredImage_Processed(object sender, Vintasoft.Sane.ImageProcessing.SaneAcquiredImageProcessedEventArgs e)
    {
        System.Console.WriteLine(" finished");
    }
    
    

    Иерархия наследования

    System.Object
       Vintasoft.Sane.SaneAcquiredImage

    Требования

    Целевые платформы: .NET 8; .NET 7; .NET 6

    Смотрите также