在我的场景中，我需要3个或更多的多页tiff图像，我需要将它们合并为一个tiff图像。
下面是我尝试过的代码。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图像的所有页面合并在一起。请指教！
谢谢
编辑：从下面的答案中更新
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);
}
}
答案 0 :(得分：2)
您需要select the active frame以确保在TIFF上获取所有页面。在您的代码中，您需要get the count of frames并遍历这些。
else块中的代码可能看起来像这样：
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);
}
您可能需要对其进行调整，因为我尚未对其进行测试。
答案 1 :(得分：0)
给定的代码非常适合将单页TIFF文件合并为单个多页TIFF文件，但是，如果有多页TIFF文件作为源，它将仅合并其第一页在结果TIFF文件中：其他的将被丢弃。
由于找不到任何可以解决该问题的示例，我们最终编写了一个小的C＃帮助程序类，该类后来成为用.NET Core 2和C＃编写的成熟的多平台控制台应用程序。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，以便其他所有人也可以使用它。我们还发布了适用于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;
}
}
}
有关其他信息和/或要下载，请查看我们发布的以下资源以更好地记录整个项目：