Bilder von einem TWAIN-Scanner mit einer .NET-Konsolenanwendung unter Linux erfassen

dotnet new console --framework net7.0

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <OutputType>Exe</OutputType>
    <TargetFramework>net7.0</TargetFramework>
    <RootNamespace>ConsoleApp1</RootNamespace>
    <ImplicitUsings>enable</ImplicitUsings>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="Vintasoft.Shared" Version="3.4.0.1" />
    <PackageReference Include="Vintasoft.Shared" Version="14.0.1.1" />
  </ItemGroup>

</Project>

using System;
using System.IO;

using Vintasoft.Twain;

namespace ConsoleApp1
{
    class Program
    {

        static void Main(string[] args)
        {
            Vintasoft.Twain.TwainGlobalSettings.Register("VintaSoft", "support@vintasoft.com", "2023-04-02", "...");
        
            try
            {
                // create TWAIN device manager
                using (DeviceManager deviceManager = new DeviceManager())
                {
                    // open TWAIN device manager
                    if (!OpenDeviceManager(deviceManager))
                        return;

                    // select TWAIN device
                    Device device = SelectDevice(deviceManager);
                    // if device is not selected
                    if (device == null)
                        return;

                    // specify that device UI should not be shown
                    device.ShowUI = false;
                    // specify that image scanning progess UI should not be shown
                    device.ShowIndicators = false;
                    // specify that device must be disabled after image scan
                    device.DisableAfterAcquire = true;

                    // open the device
                    device.Open();

                    // set device parameters
                    device.TransferMode = TransferMode.Native;
                    device.PixelType = PixelType.BW;
                    device.XferCount = 1;

                    // create directory for TIFF file
                    string directoryForImages = Path.GetDirectoryName(Directory.GetCurrentDirectory());
                    directoryForImages = Path.Combine(directoryForImages, "Images");
                    if (!Directory.Exists(directoryForImages))
                        Directory.CreateDirectory(directoryForImages);

                    string multipageTiffFilename = Path.Combine(directoryForImages, "multipage.tif");

                    // acquire image(s) from the device
                    int imageIndex = 0;
                    AcquireModalState acquireModalState = AcquireModalState.None;
                    do
                    {
                        acquireModalState = device.AcquireModal();
                        switch (acquireModalState)
                        {
                            case AcquireModalState.ImageAcquired:
                                // save acquired image to a file
                                device.AcquiredImage.Save(multipageTiffFilename);
                                // dispose an acquired image
                                device.AcquiredImage.Dispose();

                                Console.WriteLine(string.Format("Image{0} is saved.", imageIndex++));
                                break;

                            case AcquireModalState.ScanCompleted:
                                Console.WriteLine("Scan is completed.");
                                break;

                            case AcquireModalState.ScanCanceled:
                                Console.WriteLine("Scan is canceled.");
                                break;

                            case AcquireModalState.ScanFailed:
                                Console.WriteLine(string.Format("Scan is failed: {0}", device.ErrorString));
                                break;

                            case AcquireModalState.UserInterfaceClosed:
                                Console.WriteLine("User interface is closed.");
                                break;
                        }
                    }
                    while (acquireModalState != AcquireModalState.None);

                    // close the device
                    device.Close();

                    // close the device manager
                    deviceManager.Close();
                }
            }
            catch (Exception ex)
            {
                Console.WriteLine("Error: " + ex.Message);
            }

            Console.WriteLine("Press any key to continue...");
            Console.ReadKey();
        }

        /// <summary>
        /// Opens the TWAIN device manager.
        /// </summary>
        /// <param name="deviceManager">Device manager.</param>
        /// <returns><b>True</b> - device manager is opened successfully; otherwise, <b>false</b>.</returns>
        private static bool OpenDeviceManager(DeviceManager deviceManager)
        {
            // try to use TWAIN device manager 2.x
            deviceManager.IsTwain2Compatible = true;
            // if TWAIN device manager 2.x is not available
            if (!deviceManager.IsTwainAvailable)
            {
                Console.WriteLine("TWAIN device manager is not available.");
                return false;
            }

            // open the device manager
            deviceManager.Open();

            return true;
        }

        /// <summary>
        /// Selects the TWAIN device.
        /// </summary>
        /// <param name="deviceManager">TWAIN device manager.</param>
        /// <returns>TWAIN device if device is selected; otherwiase, <b>null</b>.</returns>
        private static Device SelectDevice(DeviceManager deviceManager)
        {
            int deviceCount = deviceManager.Devices.Count;
            // if no devices are found in the system
            if (deviceCount == 0)
            {
                Console.WriteLine("Devices are not found.");
                return null;
            }

            Console.WriteLine("Device list:");
            for (int i = 0; i < deviceCount; i++)
            {
                Console.WriteLine(string.Format("{0}. {1}", i + 1, deviceManager.Devices[i].Info.ProductName));
            }

            int deviceIndex = -1;
            while (deviceIndex < 0 || deviceIndex > deviceCount)
            {
                Console.Write(string.Format("Please select device by entering the device number from '1' to '{0}' or press '0' to cancel: ", deviceCount));
                deviceIndex = Console.ReadKey().KeyChar - '0';
                Console.WriteLine();
            }
            Console.WriteLine();

            if (deviceIndex == 0)
                return null;

            return deviceManager.Devices[deviceIndex - 1];
        }

    }
}

dotnet build Scan_Images.csproj

dotnet ./Scan_Images.dll