将位图列表保存到单个Tiff中 [英] Save List of bitmaps into a single Tiff

问题描述

大家好。



我一直在尝试以编程方式操作tiff图像。这就是说我的最终产品作为列表中的单个图像加载如下：

Hi all.

I have been experimenting with manipulating tiff images programmatically. That said my final product is loaded as a list of individual images in a list like so:

List<Bitmap> images = new List<Bitmap>();

我知道图像在那里，因为我可以在图片框中显示它们。



我的问题在这里正试图整理所有图像并保存为单个多页tiff文件。



到目前为止这是我在微软网站上找到的代码：Encoder.SaveFlag Field [ ^ ]

I know the images are there as I can display them in picturebox.

My problem here is trying to collate all images and save as single multipage tiff file.

so far this is the code which I have found on the Microsoft site: Encoder.SaveFlag Field[^]

ImageCodecInfo myImageCodecInfo;
System.Drawing.Imaging.Encoder myEncoder;
EncoderParameter myEncoderParameter;
EncoderParameters myEncoderParameters;

// Get an ImageCodecInfo object that represents the TIFF codec.
myImageCodecInfo = GetEncoderInfo("image/tiff");

// Create an Encoder object based on the GUID 
// for the SaveFlag parameter category.
myEncoder = System.Drawing.Imaging.Encoder.SaveFlag;

// Create an EncoderParameters object. 
// An EncoderParameters object has an array of EncoderParameter 
// objects. In this case, there is only one 
// EncoderParameter object in the array.
myEncoderParameters = new EncoderParameters(1);

// Save the first page.
myEncoderParameter = new EncoderParameter(myEncoder, (long)EncoderValue.CompressionCCITT4);
myEncoderParameters.Param[0] = myEncoderParameter;

final_Tiff.Save(destinaton, myImageCodecInfo, myEncoderParameters);

foreach (Bitmap bmp in images)
   {
   // Save rest of the pages.
   myEncoderParameter = new EncoderParameter(myEncoder, (long)EncoderValue.CompressionCCITT4);
   myEncoderParameters.Param[0] = myEncoderParameter;
   final_Tiff.SaveAdd(bmp, myEncoderParameters);
   }

// Close the multiple-frame file.
myEncoderParameter = new EncoderParameter(myEncoder, (long)EncoderValue.Flush);
myEncoderParameters.Param[0] = myEncoderParameter;
final_Tiff.SaveAdd(myEncoderParameters);

麻烦发生在：

The trouble occurs at:

final_Tiff.Save(destinaton, myImageCodecInfo, myEncoderParameters);

，错误消息：对象引用未设置为对象实例。



我检查了这些值，但它们不是空的。欢迎任何建议，并提前感谢。

with error message: Object reference not set to an instance of an object.

I did check these values and they are not null. Any suggestions are welcome, and thanks in advance.

推荐答案

首先，看看这个开源库： https://thetifflibrary.codeplex.com [ ^ ]。



您可以查看源代码以查看元数据修改是否可用。它应该是。



还有一些CodeProject文章： http://www.codeproject.com/search.aspx?q=multipage+tiff+&doctypeid=1 [ ^ ]。



首先，看看这个：将图像保存到多页TIFF文件中或将图像添加到现有TIFF文件中 [ ^ ]。



另见这一篇：一个简单的TIFF管理课程 [ ^ ]。



您可以向作者询问有关解决方案的问题。

-SA

First of all, look at this open-source library: https://thetifflibrary.codeplex.com[^].

You can look at the source code to see if metadata modification is available. It should be.

There is also a number of CodeProject articles: http://www.codeproject.com/search.aspx?q=multipage+tiff+&doctypeid=1[^].

First of all, look at this one: Save images into a multi-page TIFF file or add images to an existing TIFF file[^].

See also this one: A simple TIFF management class[^].

You can ask the authors your question about the resolution.

—SA

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