我现在如何向图像添加自定义标记,但它没有显示为图像查看器中的标记名称。我只看到我指定的号码及其价值。
为什么我的自定义标签没有正确的名称?
using BitMiracle.LibTiff.Classic;
namespace WindowsFormsApplication1
{
class Program
{
private const TiffTag IMG_GUID = (TiffTag)666;
private static Tiff.TiffExtendProc m_parentExtender;
public static void TagExtender(Tiff tif)
{
TiffFieldInfo[] tiffFieldInfo =
{
new TiffFieldInfo(IMG_GUID, -1, -1, TiffType.ASCII, FieldBit.Custom, true, false, "IMG_GUID"),
};
tif.MergeFieldInfo(tiffFieldInfo, tiffFieldInfo.Length);
if (m_parentExtender != null)
m_parentExtender(tif);
}
static void Main(string[] args)
{
// Register the extender callback
// It's a good idea to keep track of the previous tag extender (if any) so that we can call it
// from our extender allowing a chain of customizations to take effect.
m_parentExtender = Tiff.SetTagExtender(TagExtender);
byte[] buffer = new byte[25 * 144];
string outputFileName = writeTiffWithCustomTags(buffer);
// restore previous tag extender
Tiff.SetTagExtender(m_parentExtender);
}
private static string writeTiffWithCustomTags(byte[] buffer)
{
string existingTiffName = "..\\..\\tifimages\\cramps.tif";
string outputFileName = existingTiffName;
using (Tiff image = Tiff.Open(outputFileName, "a"))
{
// set custom tags
image.SetDirectory(0);
string value = "test";
image.SetField(IMG_GUID, value);
image.CheckpointDirectory();
// Write the information to the file
image.WriteEncodedStrip(0, buffer, 25 * 144);
}
return outputFileName;
}
}
}
答案 0 :(得分:1)
您用于查看TIFF的应用程序应事先了解您的自定义标记,以便能够显示其名称。
这不会发生! (因为您可以为自定义标签选择几乎任意整数。)
因此,自定义标记显示为(整数,值)对没有任何问题。这就是自定义标签的工作方式。