在 .NET 2.0 中将位图转换为一个多页 TIFF 图像
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【中文标题】在 .NET 2.0 中将位图转换为一个多页 TIFF 图像【英文标题】：Convert bitmaps to one multipage TIFF image in .NET 2.0 【发布时间】：2008-12-29 19:19:56 【问题描述】：如何将位图数组转换为全新的 TIFF 格式图像，并将所有位图作为帧添加到这个新的 tiff 图像中？
使用 .NET 2.0。
【问题讨论】：
最新.net版本的解决方案？ 【参考方案1】：从第一个位图开始，将其放入 Image 对象中
Bitmap bitmap = (Bitmap)Image.FromFile(file);
将位图以 tiff 格式保存到内存
MemoryStream byteStream = new MemoryStream();
bitmap.Save(byteStream, ImageFormat.Tiff);
将 Tiff 放入另一个 Image 对象中
Image tiff = Image.FromStream(byteStream)
准备编码器：
var encoderInfo = ImageCodecInfo.GetImageEncoders().First(i => i.MimeType == "image/tiff");
EncoderParameters encoderParams = new EncoderParameters(2);
encoderParams.Param[0] = new EncoderParameter(Encoder.Compression, (long)EncoderValue.CompressionNone);
encoderParams.Param[1] = new EncoderParameter(Encoder.SaveFlag, (long)EncoderValue.MultiFrame);
保存到文件：
tiff.Save(sOutFilePath, encoderInfo, encoderParams);
对于后续页面，准备编码器：
EncoderParameters EncoderParams = new EncoderParameters(2);
EncoderParameter SaveEncodeParam = new EncoderParameter(
Encoder.SaveFlag,
(long)EncoderValue.FrameDimensionPage);
EncoderParameter CompressionEncodeParam = new EncoderParameter(
Encoder.Compression, (long)EncoderValue.CompressionNone);
EncoderParams.Param[0] = CompressionEncodeParam;
EncoderParams.Param[1] = SaveEncodeParam;
tiff.SaveAdd(/* next image as tiff - do the same as above with memory */, EncoderParams);
最后刷新文件：
EncoderParameter SaveEncodeParam = new EncoderParameter(
Encoder.SaveFlag, (long)EncoderValue.Flush);
EncoderParams = new EncoderParameters(1);
EncoderParams.Param[0] = SaveEncodeParam;
tiff.SaveAdd(EncoderParams);
这应该让你开始。
【讨论】：
优秀的答案。如果你描述你是如何得到它的（如果不是从试错中学到的），只会更完整，因为 MSDN 文档几乎无法理解。 @alabamasucks - 这是一个返回指定 mime 类型的 ImageCodecInfo 对象的函数。可以替换为：ImageCodecInfo.GetImageEncoders().First(i => i.MimeType == "image/tiff"); 我遇到了同样的黑色图像问题，原来我在调用 tiff 上的 write 之前关闭了位图流。 它将图像转换为 TIFF 但输出文件是黑白的。有什么理由吗？ 优秀的答案。我想补充一点，GetEncoderInfo() 方法记录在 MSDN 上的 msdn.microsoft.com/en-us/library/… 并且 Encoder.SaveFlag 可能需要完全限定——System.Drawing.Imaging.Encoder.SaveFlag。【参考方案2】：在谷歌上搜索了一下后发现了这篇文章。我尝试了 a'b'c'd'e'f'g'h' 在帖子中的代码，但这对我不起作用。也许，我做的不对。
无论如何，我发现另一篇将图像保存到多页 tiff 的帖子。这是帖子的链接：Adding frames to a Multi-Frame TIFF。
另外，这是对我有用的代码。它应该与那个帖子相同。
Encoder encoder = Encoder.SaveFlag;
ImageCodecInfo encoderInfo = ImageCodecInfo.GetImageEncoders().First(i => i.MimeType == "image/tiff");
EncoderParameters encoderParameters = new EncoderParameters(1);
encoderParameters.Param[0] = new EncoderParameter(encoder, (long)EncoderValue.MultiFrame);
// Save the first frame of the multi page tiff
Bitmap firstImage = (Bitmap) _scannedPages[0].RawContent;
firstImage.Save(fileName, encoderInfo, encoderParameters);
encoderParameters.Param[0] = new EncoderParameter(encoder, (long)EncoderValue.FrameDimensionPage);
// Add the remaining images to the tiff
for (int i = 1; i < _scannedPages.Count; i++)
Bitmap img = (Bitmap) _scannedPages[i].RawContent;
firstImage.SaveAdd(img, encoderParameters);
// Close out the file
encoderParameters.Param[0] = new EncoderParameter(encoder, (long)EncoderValue.Flush);
firstImage.SaveAdd(encoderParameters);
【讨论】：
【参考方案3】：死灵法师 接受的答案有点模糊。 这是完整的工作代码：
public class MultiPageTiff
private static System.Drawing.Imaging.ImageCodecInfo GetEncoderInfo(string mimeType)
System.Drawing.Imaging.ImageCodecInfo[] encoders =
System.Drawing.Imaging.ImageCodecInfo.GetImageEncoders();
if (encoders != null)
for (int i = 0; i < encoders.Length; i++)
if (encoders[i].MimeType == mimeType)
return encoders[i];
// End if (encoders[i].MimeType == mimeType)
// Next i
// End if (encoders != null)
return null;
// End Function GetEncoderInfo
public static System.Drawing.Image Generate(string[] filez)
System.Drawing.Image multiPageFile = null;
byte[] ba = null;
System.Drawing.Imaging.ImageCodecInfo tiffCodec = GetEncoderInfo("image/tiff");
using (System.IO.MemoryStream ms = new System.IO.MemoryStream())
for (int i = 0; i < filez.Length; ++i)
using (System.Drawing.Image inputImage = System.Drawing.Image.FromFile(filez[i]))
using (System.IO.MemoryStream byteStream = new System.IO.MemoryStream())
inputImage.Save(byteStream, System.Drawing.Imaging.ImageFormat.Tiff);
if (i == 0)
multiPageFile = System.Drawing.Image.FromStream(byteStream);
multiPageFile = SaveImages(tiffCodec, ms, multiPageFile, null);
else
using (System.Drawing.Image tiffImage = System.Drawing.Image.FromStream(byteStream))
multiPageFile = SaveImages(tiffCodec, ms, tiffImage, multiPageFile);
// End Using tiffImage
// End Using byteStream
// End Using inputImage
// Next i
ba = ms.ToArray();
// End Using ms
System.IO.File.WriteAllBytes(@"d:\mytiff.tiff", ba);
//if (multiPageFile != null)
//
// multiPageFile.Dispose();
// multiPageFile = null;
//
return multiPageFile;
private static System.Drawing.Image SaveImages(
System.Drawing.Imaging.ImageCodecInfo tiffCodec
, System.IO.MemoryStream outputStream
, System.Drawing.Image tiffImage, System.Drawing.Image firstImage)
using (System.Drawing.Imaging.EncoderParameters encParameters =
new System.Drawing.Imaging.EncoderParameters(3))
if (firstImage == null)
encParameters.Param[0] = new System.Drawing.Imaging.EncoderParameter(
System.Drawing.Imaging.Encoder.SaveFlag
, (long)System.Drawing.Imaging.EncoderValue.MultiFrame // 18L
);
else
encParameters.Param[0] = new System.Drawing.Imaging.EncoderParameter(
System.Drawing.Imaging.Encoder.SaveFlag
, (long)System.Drawing.Imaging.EncoderValue.FrameDimensionPage // 23L
);
encParameters.Param[1] = new System.Drawing.Imaging.EncoderParameter(
System.Drawing.Imaging.Encoder.ColorDepth, 24L
);
encParameters.Param[2] = new System.Drawing.Imaging.EncoderParameter(
System.Drawing.Imaging.Encoder.Compression
, (long)System.Drawing.Imaging.EncoderValue.CompressionLZW
);
if (firstImage == null)
firstImage = tiffImage;
((System.Drawing.Bitmap)tiffImage).SetResolution(96, 96);
firstImage.Save(outputStream, tiffCodec, encParameters);
else
((System.Drawing.Bitmap)tiffImage).SetResolution(96, 96);
firstImage.SaveAdd(tiffImage, encParameters);
if (encParameters.Param[0] != null)
encParameters.Param[0].Dispose();
if (encParameters.Param[1] != null)
encParameters.Param[1].Dispose();
if (encParameters.Param[2] != null)
encParameters.Param[2].Dispose();
// End Using encParameters
return firstImage;
【讨论】：
嘿，“string[] filez”这应该是什么类型的文件？我正在向其发送 pdf 文件的路径，但出现错误 任何类型的 System.Drawing.Image 都可以打开，例如 png、bmp、jpg、gif、tiff、wmf、exif 和 memorybmp。换句话说，没有 PDF 也没有 SVG。 docs.microsoft.com/en-us/dotnet/api/…【参考方案4】：有用的话题。谢谢（你的）信息。我需要从 base64 编码字符串数组中拼接多页图像。这是我根据这个线程中的信息汇总的。我不太明白为什么我必须创建一个明确指定的图像格式的内存流，但这就是最终的工作，如果有更好的方法来处理这个问题，请告诉我。谢谢
/// <summary>
/// Takes in an array of base64 encoded strings and creates a multipage tiff.
/// </summary>
/// <param name="sOutFile">file to be generated</param>
/// <param name="pagesbase64Array"></param>
private void SaevAsMultiPageTiff(string sOutFile, string[] pagesbase64Array)
System.Drawing.Imaging.Encoder encoder = System.Drawing.Imaging.Encoder.SaveFlag;
ImageCodecInfo encoderInfo = ImageCodecInfo.GetImageEncoders().First(i => i.MimeType == "image/tiff");
EncoderParameters encoderParameters = new EncoderParameters(1);
encoderParameters.Param[0] = new EncoderParameter(encoder, (long)EncoderValue.MultiFrame);
Bitmap firstImage = null;
try
using (MemoryStream ms1 = new MemoryStream())
using (MemoryStream ms = new MemoryStream(Convert.FromBase64String(pagesbase64Array[0])))
Image.FromStream(ms).Save(ms1, ImageFormat.Tiff);
firstImage = (Bitmap)Image.FromStream(ms1);
// Save the first frame of the multi page tiff
firstImage.Save(sOutFile, encoderInfo, encoderParameters); //throws Generic GDI+ error if the memory streams are not open when this is called
encoderParameters.Param[0] = new EncoderParameter(encoder, (long)EncoderValue.FrameDimensionPage);
Bitmap imagePage;
// Add the remining images to the tiff
for (int i = 1; i < pagesbase64Array.Length; i++)
using (MemoryStream ms1 = new MemoryStream())
using (MemoryStream ms = new MemoryStream(Convert.FromBase64String(pagesbase64Array[i])))
Image.FromStream(ms).Save(ms1, ImageFormat.Tiff);
imagePage = (Bitmap)Image.FromStream(ms1);
firstImage.SaveAdd(imagePage, encoderParameters); //throws Generic GDI+ error if the memory streams are not open when this is called
catch (Exception)
//ensure the errors are not missed while allowing for flush in finally block so files dont get locked up.
throw;
finally
// Close out the file
encoderParameters.Param[0] = new EncoderParameter(encoder, (long)EncoderValue.Flush);
firstImage.SaveAdd(encoderParameters);
【讨论】：
【参考方案5】：在处理和创建标准化格式的文件时，我不喜欢 Microsoft 的跟踪记录，我建议使用 ImageMagick，它以 MagickNet 的形式作为 .Net 库提供（请注意，http://midimick.com/magicknet/ 目前有间谍软件弹出窗口，我已通知网站所有者）。
【讨论】：
【参考方案6】：这里是多tiff文件的拆分操作。它就像字符串子字符串函数一样工作。图像的第一个索引将是您的 MasterBitMap，您将继续向 MasterBitmap 添加帧，直到索引结束。
public void SaveMultiFrameTiff(int start, int end)
string outputFileName = "out.TIF";
string inputFileName = "input.TIF";
try
Bitmap MasterBitmap = new Bitmap(inputFileName ); //Start page of document(master)
Image imageAdd = Image.FromFile(inputFileName ); //Frame Image that will be added to the master
Guid guid = imageAdd.FrameDimensionsList[0]; //GUID
FrameDimension dimension = new FrameDimension(guid);
// start index cannot be less than 0 and cannot be greater than frame count
if (start < 1 || end > MasterBitmap.GetFrameCount(dimension)) return;
EncoderParameters ep = new EncoderParameters(1);
//Get Image Codec Information
ImageCodecInfo[] codecs = ImageCodecInfo.GetImageEncoders();
ImageCodecInfo codecInfo = codecs[3]; //image/tiff
//MultiFrame Encoding format
EncoderParameter epMultiFrame = new EncoderParameter(System.Drawing.Imaging.Encoder.SaveFlag, (long)EncoderValue.MultiFrame);
ep.Param[0] = epMultiFrame;
MasterBitmap.SelectActiveFrame(dimension, start - 1);
MasterBitmap.Save(outputFileName, codecInfo, ep);//create master document
//FrameDimensionPage Encoding format
EncoderParameter epFrameDimensionPage = new EncoderParameter(System.Drawing.Imaging.Encoder.SaveFlag, (long)EncoderValue.FrameDimensionPage);
ep.Param[0] = epFrameDimensionPage;
for (int i = start; i < end; i++)
imageAdd.SelectActiveFrame(dimension, i);//select next frame
MasterBitmap.SaveAdd(new Bitmap(imageAdd), ep);//add it to the master
//Flush Encoding format
EncoderParameter epFlush = new EncoderParameter(System.Drawing.Imaging.Encoder.SaveFlag, (long)EncoderValue.Flush);
ep.Param[0] = epFlush;
MasterBitmap.SaveAdd(ep); //flush the file
catch (Exception ex)
throw ex;
【讨论】：
【参考方案7】：下面是如何在 vb.net 中执行此操作：
Imports System.Drawing.Imaging
Sub CreateTiff(sOutTiffFile As String, sInFile1 As String, sInFile2 As String)
Dim bitmap As Bitmap = Image.FromFile(sInFile1)
Dim byteStream As MemoryStream = New MemoryStream()
bitmap.Save(byteStream, System.Drawing.Imaging.ImageFormat.Tiff)
Dim tiff As Image = Image.FromStream(byteStream)
Dim oParams As EncoderParameters = New EncoderParameters(2)
oParams.Param(0) = New EncoderParameter(Imaging.Encoder.Compression, EncoderValue.CompressionCCITT4)
oParams.Param(1) = New EncoderParameter(Imaging.Encoder.SaveFlag, EncoderValue.MultiFrame)
tiff.Save(sOutTiffFile, GetEncoderInfo("image/tiff"), oParams)
'Next Page
Dim bitmap2 As Bitmap = Image.FromFile(sInFile2)
oParams.Param(1) = New EncoderParameter(Imaging.Encoder.SaveFlag, EncoderValue.FrameDimensionPage)
tiff.SaveAdd(bitmap2, oParams)
'Flush
Dim oFlushParams As EncoderParameters = New EncoderParameters(1)
oFlushParams.Param(0) = New EncoderParameter(Imaging.Encoder.SaveFlag, EncoderValue.Flush)
tiff.SaveAdd(oFlushParams)
End Sub
Private Function GetEncoderInfo(mimeType As String) As System.Drawing.Imaging.ImageCodecInfo
Dim encoders = System.Drawing.Imaging.ImageCodecInfo.GetImageEncoders()
For i As Integer = 0 To encoders.Length - 1
If encoders(i).MimeType = mimeType Then
Return encoders(i)
End If
Next
Return Nothing
End Function
【讨论】：
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