/// <summary>
/// Saves the TIFF file with specified ICC profile.
/// </summary>
/// <param name="sourceFilePath">The path to a source TIFF file.</param>
/// <param name="iccProfilePath">The path to an ICC profile that should be applied to the source TIFF file.</param>
/// <param name="outputFilePath">The path to an output TIFF file.</param>
private static void Save(string sourceFilePath, string iccProfilePath, string outputFilePath)
{
    // open TIFF file
    using (Vintasoft.Imaging.Codecs.ImageFiles.Tiff.TiffFile tiffFile =
        new Vintasoft.Imaging.Codecs.ImageFiles.Tiff.TiffFile(sourceFilePath))
    {
        // create decoding settings
        Vintasoft.Imaging.Codecs.Decoders.DecodingSettings decodingSettings =
            new Vintasoft.Imaging.Codecs.Decoders.DecodingSettings();
        // enable color management
        decodingSettings.ColorManagement = new Vintasoft.Imaging.ColorManagement.ColorManagementDecodeSettings();
        // use embedded ICC profile
        decodingSettings.ColorManagement.UseEmbeddedInputProfile = true;
        // get image of TIFF page
        using (Vintasoft.Imaging.VintasoftImage image = tiffFile.Pages[0].GetImage(decodingSettings, null))
        {
            // load ICC profile data
            byte[] iccProfileData = System.IO.File.ReadAllBytes(iccProfilePath);

            // create ICC profile data
            using (Vintasoft.Imaging.ColorManagement.Icc.IccProfile profile =
                new Vintasoft.Imaging.ColorManagement.Icc.IccProfile(iccProfileData))
            {
                // create color transform command
                Vintasoft.Imaging.ImageProcessing.Color.ColorTransformCommand command = CreateCommand(image, profile);
                // transform image
                command.ExecuteInPlace(image);
            }

            // create TIFF file
            using (Vintasoft.Imaging.Codecs.ImageFiles.Tiff.TiffFile newTiffFile = CreateTiffFile(image, iccProfileData))
                // save TIFF file
                newTiffFile.Save(outputFilePath);
        }
    }
}

/// <summary>
/// Creates <see cref="Vintasoft.Imaging.ImageProcessing.Color.ColorTransformCommand"/>.
/// </summary>
/// <param name="sourceImage">The source image.</param>
/// <param name="iccProfile">The ICC profile.</param>
/// <returns>
/// The <see cref="Vintasoft.Imaging.ImageProcessing.Color.ColorTransformCommand"/>.
/// </returns>
private static Vintasoft.Imaging.ImageProcessing.Color.ColorTransformCommand CreateCommand(
    Vintasoft.Imaging.VintasoftImage sourceImage, Vintasoft.Imaging.ColorManagement.Icc.IccProfile iccProfile)
{
    // create command
    Vintasoft.Imaging.ImageProcessing.Color.ColorTransformCommand command =
        new Vintasoft.Imaging.ImageProcessing.Color.ColorTransformCommand();

    // create decode settings
    Vintasoft.Imaging.ColorManagement.ColorManagementDecodeSettings decodeSettings =
        new Vintasoft.Imaging.ColorManagement.ColorManagementDecodeSettings();

    // set the ICC profile
    switch (iccProfile.DeviceColorSpace)
    {
        case Vintasoft.Imaging.ColorSpaceType.CMYK:
            decodeSettings.OutputCmykProfile = iccProfile;
            break;

        case Vintasoft.Imaging.ColorSpaceType.sRGB:
            decodeSettings.OutputRgbProfile = iccProfile;
            break;

        case Vintasoft.Imaging.ColorSpaceType.Gray:
            decodeSettings.OutputGrayscaleProfile = iccProfile;
            break;

        default:
            throw new System.NotImplementedException();
    }

    // set the color transform
    command.ColorTransform = decodeSettings.ColorSpaceTransforms.GetColorTransform(
        sourceImage.ColorSpaceFormat, sourceImage.ColorSpaceFormat);

    return command;
}

/// <summary>
/// Creates the TIFF file.
/// </summary>
/// <param name="image">The image.</param>
/// <param name="iccProfileData">The ICC profile data.</param>
/// <returns>
/// The TIFF file.
/// </returns>
private static Vintasoft.Imaging.Codecs.ImageFiles.Tiff.TiffFile CreateTiffFile(
    Vintasoft.Imaging.VintasoftImage image, byte[] iccProfileData)
{
    // create TIFF file
    Vintasoft.Imaging.Codecs.ImageFiles.Tiff.TiffFile tiffFile =
        new Vintasoft.Imaging.Codecs.ImageFiles.Tiff.TiffFile();
    // add image
    tiffFile.Pages.Add(image);

    // get IFD tags
    Vintasoft.Imaging.Codecs.ImageFiles.Tiff.TiffTagCollection ifdTags =
        tiffFile.Pages[tiffFile.Pages.Count - 1].IFD.Tags;

    // add ICC profile tag
    ifdTags.Add(Vintasoft.Imaging.Codecs.ImageFiles.Tiff.TiffTagId.ICCProfile, iccProfileData);

    return tiffFile;
}