我正在使用优秀的ExifLib从Windows Phone 8(http://www.codeproject.com/Articles/36342/ExifLib-A-Fast-Exif-Data-Extractor-for-NET-2-0)上的图像中提取Exif数据。但是,由于隐私限制,我需要能够从用户照片库中导入的图像中删除GPS exif数据。
不幸的是我无法找到一种方法来轻松编辑或删除这些数据,我缺少的任何指针或库?
非常感谢任何帮助。
答案 0 :(得分:4)
有blog post here显示如何在不重新编码图像的情况下删除EXIF数据。来自帖子的代码
using System.IO;
namespace ExifRemover
{
public class JpegPatcher
{
public Stream PatchAwayExif(Stream inStream, Stream outStream)
{
byte[] jpegHeader = new byte[2];
jpegHeader[0] = (byte)inStream.ReadByte();
jpegHeader[1] = (byte)inStream.ReadByte();
if (jpegHeader[0] == 0xff && jpegHeader[1] == 0xd8) //check if it's a jpeg file
{
SkipAppHeaderSection(inStream);
}
outStream.WriteByte(0xff);
outStream.WriteByte(0xd8);
int readCount;
byte[] readBuffer = new byte[4096];
while ((readCount = inStream.Read(readBuffer, 0, readBuffer.Length)) > 0)
outStream.Write(readBuffer, 0, readCount);
return outStream;
}
private void SkipAppHeaderSection(Stream inStream)
{
byte[] header = new byte[2];
header[0] = (byte)inStream.ReadByte();
header[1] = (byte)inStream.ReadByte();
while (header[0] == 0xff && (header[1] >= 0xe0 && header[1] <= 0xef))
{
int exifLength = inStream.ReadByte();
exifLength = exifLength << 8;
exifLength |= inStream.ReadByte();
for (int i = 0; i < exifLength - 2; i++)
{
inStream.ReadByte();
}
header[0] = (byte)inStream.ReadByte();
header[1] = (byte)inStream.ReadByte();
}
inStream.Position -= 2; //skip back two bytes
}
}
}