将多个多页 tiff 图像合并为单个 tiff C#

Question

在我的场景中，我有 3 个或更多的多页 tiff 图像，我需要将它们合并成一个 tiff 图像。

下面是我试过的代码。它合并到单个 tiff 图像中，但仅与所有 tiff 图像的第一页合并。

private static void MergeTiff(string[] sourceFiles)
{
    string[] sa = sourceFiles;
    //get the codec for tiff files
    ImageCodecInfo info = null;
    foreach (ImageCodecInfo ice in ImageCodecInfo.GetImageEncoders())
        if (ice.MimeType == "image/tiff")
            info = ice;

    //use the save encoder
    Encoder enc = Encoder.SaveFlag;

    EncoderParameters ep = new EncoderParameters(1);
    ep.Param[0] = new EncoderParameter(enc, (long)EncoderValue.MultiFrame);

    Bitmap pages = null;

    int frame = 0;

    foreach (string s in sa)
    {
        if (frame == 0)
        {
            MemoryStream ms = new MemoryStream(File.ReadAllBytes(Path.Combine(Environment.CurrentDirectory, @"C:\Data_Warehouse\SVNRepository\CD.BNS.W5555.LT45555C.D180306.T113850.Z0101\", s)));
            pages = (Bitmap)Image.FromStream(ms);

            var appDataPath = @"C:\Data_Warehouse\SVNRepository\Tiffiles\";
            var filePath = Path.Combine(appDataPath, Path.GetRandomFileName() + ".tif");

            //save the first frame
            pages.Save(filePath, info, ep);
        }
        else
        {
            //save the intermediate frames
            ep.Param[0] = new EncoderParameter(enc, (long)EncoderValue.FrameDimensionPage);

            try
            {
                MemoryStream mss = new MemoryStream(File.ReadAllBytes(Path.Combine(Environment.CurrentDirectory, @"C:\Data_Warehouse\SVNRepository\CD.BNS.W5555.LT45555C.D180306.T113850.Z0101\", s)));
                Bitmap bm = (Bitmap)Image.FromStream(mss);
                pages.SaveAdd(bm, ep);
            }
            catch (Exception e)
            {
                //LogError(e, s);
            }
        }

        if (frame == sa.Length - 1)
        {
            //flush and close.
            ep.Param[0] = new EncoderParameter(enc, (long)EncoderValue.Flush);
            pages.SaveAdd(ep);

        }

        frame++;
    }

}

我需要将多个 tiff 图像与每个 tiff 图像的所有页面连接起来。请指教！

谢谢

编辑：根据以下答案更新

if (frame == 0)
            {
                MemoryStream ms = new MemoryStream(File.ReadAllBytes(Path.Combine(Environment.CurrentDirectory, @"C:\OMTest\Working\", s)));
                pages = (Bitmap)Image.FromStream(ms);

                var appDataPath = @"C:\Data_Warehouse\SVNRepository\Tiffiles\";
                var filePath = Path.Combine(appDataPath, Path.GetRandomFileName() + ".tif");

                //save the first frame
                pages.Save(filePath, info, ep);

                //Save the second frame if any
                int frameCount1 = pages.GetFrameCount(FrameDimension.Page);
                if (frameCount1 > 1)
                {
                    for (int i = 1; i < frameCount1; i++)
                    {
                        ep.Param[0] = new EncoderParameter(enc, (long)EncoderValue.FrameDimensionPage);
                        pages.SelectActiveFrame(FrameDimension.Page, i);
                        pages.SaveAdd(pages, ep);
                    }
                }
            }
            else
            {
                //save the intermediate frames
                ep.Param[0] = new EncoderParameter(enc, (long)EncoderValue.FrameDimensionPage);
                try
                {
                    MemoryStream mss = new MemoryStream(File.ReadAllBytes(Path.Combine(Environment.CurrentDirectory, @"C:\OMTest\Working\", s)));
                    Bitmap bm = (Bitmap)Image.FromStream(mss);
                    int frameCount = bm.GetFrameCount(FrameDimension.Page);
                    for (int i = 0; i < frameCount; i++)
                    {
                        bm.SelectActiveFrame(FrameDimension.Page, i);
                        pages.SaveAdd(bm, ep);
                    }
                }
                catch (Exception e)
                {
                    //LogError(e, s);
                }
            }

Answer 1

您需要 select the active frame to ensure you are getting all pages on the TIFF. In your code you need to get the count of frames 并遍历这些。

您的 else 块中的代码可能如下所示：

MemoryStream mss = new MemoryStream(File.ReadAllBytes(Path.Combine(Environment.CurrentDirectory, @"C:\Data_Warehouse\SVNRepository\CD.BNS.W5555.LT45555C.D180306.T113850.Z0101\", s)));
Bitmap bm = (Bitmap)Image.FromStream(mss);
int frameCount = bm.GetFrameCount(FrameDimension.Page);
for(int i=0;i<frameCount;i++){
    bm.SelectActiveFrame(FrameDimension.Page, i);
    pages.SaveAdd(bm, ep);
}

您可能需要调整它，因为我还没有测试它。

Answer 2

给定的代码非常适合将单页 TIFF 文件合并为单个多页 TIFF，但是，如果有多页 TIFF 文件作为源，它只会将它们的第一页合并到生成的 TIFF 文件中: 其他的将被丢弃。

由于我们找不到任何可以解决这个问题的工作示例，我们最终编写了一个小的 C# 帮助程序 class，它后来成为一个用 . NET 核心 2 和 C#。我们将项目命名为 MergeTIFF 并在 GNU v3 许可下在 GitHub 上发布了整个源代码，以便其他人可以使用它还有；我们还发布了 Windows 和 Linux（32 位和 64 位）的二进制文件。

以下是 C# 代码的相关摘录：

using System;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;

namespace MergeTiff.NET
{
    /// <summary>
    /// A small helper class to handle TIFF files
    /// </summary>
    public static class TiffHelper
    {
        /// <summary>
        /// Merges multiple TIFF files (including multipage TIFFs) into a single multipage TIFF file.
        /// </summary>
        public static byte[] MergeTiff(params byte[][] tiffFiles)
        {
            byte[] tiffMerge = null;
            using (var msMerge = new MemoryStream())
            {
                //get the codec for tiff files
                ImageCodecInfo ici = null;
                foreach (ImageCodecInfo i in ImageCodecInfo.GetImageEncoders())
                    if (i.MimeType == "image/tiff")
                        ici = i;

                Encoder enc = Encoder.SaveFlag;
                EncoderParameters ep = new EncoderParameters(1);

                Bitmap pages = null;
                int frame = 0;

                foreach (var tiffFile in tiffFiles)
                {
                    using (var imageStream = new MemoryStream(tiffFile))
                    {
                        using (Image tiffImage = Image.FromStream(imageStream))
                        {
                            foreach (Guid guid in tiffImage.FrameDimensionsList)
                            {
                                //create the frame dimension 
                                FrameDimension dimension = new FrameDimension(guid);
                                //Gets the total number of frames in the .tiff file 
                                int noOfPages = tiffImage.GetFrameCount(dimension);

                                for (int index = 0; index < noOfPages; index++)
                                {
                                    FrameDimension currentFrame = new FrameDimension(guid);
                                    tiffImage.SelectActiveFrame(currentFrame, index);
                                    using (MemoryStream tempImg = new MemoryStream())
                                    {
                                        tiffImage.Save(tempImg, ImageFormat.Tiff);
                                        {
                                            if (frame == 0)
                                            {
                                                //save the first frame
                                                pages = (Bitmap)Image.FromStream(tempImg);
                                                ep.Param[0] = new EncoderParameter(enc, (long)EncoderValue.MultiFrame);
                                                pages.Save(msMerge, ici, ep);
                                            }
                                            else
                                            {
                                                //save the intermediate frames
                                                ep.Param[0] = new EncoderParameter(enc, (long)EncoderValue.FrameDimensionPage);
                                                pages.SaveAdd((Bitmap)Image.FromStream(tempImg), ep);
                                            }
                                        }
                                        frame++;
                                    }
                                }
                            }
                        }
                    }
                }
                if (frame >0)
                {
                    //flush and close.
                    ep.Param[0] = new EncoderParameter(enc, (long)EncoderValue.Flush);
                    pages.SaveAdd(ep);
                }

                msMerge.Position = 0;
                tiffMerge = msMerge.ToArray();
            }
            return tiffMerge;
        }
    }
}

有关 and/or 下载它的更多信息，您可以查看我们发布的以下资源以更好地记录整个项目：

将多个多页 tiff 图像合并为单个 tiff C#

Merge multiple multi-page tiff images to a single tiff C#

.net

c#

drawing

tiff

image-processing