JPG压缩的TIF文件如何在c#中读取

我在调用这个函数的时候发现碰到JPG压缩的TIF文件就出错，其他tif文件就正常，如何解决啊？
       /// <summary>
        /// This function will output the image to a TIFF file with specific compression format
        /// </summary>
        /// <param name="outPutDirectory">The splited images' directory</param>
        /// <param name="format">The codec for compressing</param>
        /// <returns>splited file name array list</returns>    public ArrayList SplitTiffImage(string outPutDirectory, EncoderValue format)
        {
            string fileStartString = outPutDirectory + "\\" + GetFileNameStartString(_ImageFileName);
            ArrayList splitedFileNames = new ArrayList();
            try
            {
                Guid objGuid = image.FrameDimensionsList[0];
                FrameDimension objDimension = new FrameDimension(objGuid);                //Saves every frame as a separate file.
                Encoder enc = Encoder.Compression;
                int curFrame = 0;
                for (int i = 0; i < _PageNumber; i++)
                {
                    image.SelectActiveFrame(objDimension, curFrame);
                    EncoderParameters ep = new EncoderParameters(1);
                    ep.Param[0] = new EncoderParameter(enc, (long)format);
                    ImageCodecInfo info = GetEncoderInfo("image/tiff");
                 
                    //Save the master bitmap
                    string fileName = string.Format("{0}{1}.TIF", fileStartString, i.ToString());
                    image.Save(fileName, info, ep);
                    splitedFileNames.Add(fileName);                    curFrame++;
                }
            }
            catch (Exception)
            {
                throw;
            }            return splitedFileNames;
        }