多页tif图像的处理,多个图像合并为一个文件,或者反之.using System;using System.IO;using System.Drawing;using System.Drawing.Imaging; using System.Collections;
/// <summary> /// Summary description for TiffManager. /// </summary> public class TiffManager : IDisposable { private string _ImageFileName; private int _PageNumber; public Image image; private string _TempWorkingDir;
public TiffManager(string imageFileName) { this._ImageFileName=imageFileName; image=Image.FromFile(_ImageFileName); GetPageNumber(); } public TiffManager() { }
/// <summary> /// Read the image file for the page number. /// </summary> private void GetPageNumber() { Guid objGuid=image.FrameDimensionsList[0]; FrameDimension objDimension=new FrameDimension(objGuid);
//Gets the total number of frames in the .tiff file _PageNumber=image.GetFrameCount(objDimension); return; }
/// <summary> /// Read the image base string, /// Assert(GetFileNameStartString(@"c:\test\abc.tif"),"abc") /// </summary> /// <param name="strFullName"></param> /// <returns></returns> private string GetFileNameStartString(string strFullName) { int posDot=_ImageFileName.LastIndexOf("."); int posSlash=_ImageFileName.LastIndexOf(@"\"); return _ImageFileName.Substring(posSlash+1,posDot-posSlash-1); }
/// <summary> /// 把多页的tiff文件分页，返回Bitmap图像数组。 /// </summary> /// <param name="images">Bitmap图像数组</param> /// <param name="format">图像编码格式</param> public void SplitTiffImage(out Bitmap [] images ,EncoderValue format) { images =new Bitmap[this._PageNumber]; try { Guid objGuid=image.FrameDimensionsList[0]; FrameDimension objDimension=new FrameDimension(objGuid);
int number=0; //Saves every frame as a separate file. Encoder enc=Encoder.Compression; for (int i=0;i<_PageNumber;i++) { image.SelectActiveFrame(objDimension,number); EncoderParameters ep=new EncoderParameters(1); ep.Param[0]=new EncoderParameter(enc,(long)format); ImageCodecInfo info=GetEncoderInfo("image/tiff"); images[number] = (Bitmap)image.Clone(); number++; } } catch (Exception) { throw; } }
/// <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; }
/// <summary> /// This function will join the TIFF file with a specific compression format /// </summary> /// <param name="imageFiles">string array with source image files</param> /// <param name="outFile">target TIFF file to be produced</param> /// <param name="compressEncoder">compression codec enum</param> public void JoinTiffImages(string[] imageFiles,string outFile,EncoderValue compressEncoder) { try { //If only one page in the collection, copy it directly to the target file. if (imageFiles.Length==1) { File.Copy(imageFiles[0],outFile,true); return; }
//use the save encoder Encoder enc=Encoder.SaveFlag;
EncoderParameters ep=new EncoderParameters(2); ep.Param[0]=new EncoderParameter(enc,(long)EncoderValue.MultiFrame); ep.Param[1] = new EncoderParameter(Encoder.Compression,(long)compressEncoder);
Bitmap pages=null; int frame=0; ImageCodecInfo info=GetEncoderInfo("image/tiff");
foreach(string strImageFile in imageFiles) { if(frame==0) { pages=(Bitmap)Image.FromFile(strImageFile);
//save the first frame pages.Save(outFile,info,ep); } else { //save the intermediate frames ep.Param[0]=new EncoderParameter(enc,(long)EncoderValue.FrameDimensionPage);
Bitmap bm=(Bitmap)Image.FromFile(strImageFile); pages.SaveAdd(bm,ep); }
if(frame==imageFiles.Length-1) { //flush and close. ep.Param[0]=new EncoderParameter(enc,(long)EncoderValue.Flush); pages.SaveAdd(ep); }
frame++; } } catch (Exception) { throw; } return; }
/// <summary> /// This function will join the TIFF file with a specific compression format /// </summary> /// <param name="imageFiles">array list with source image files</param> /// <param name="outFile">target TIFF file to be produced</param> /// <param name="compressEncoder">compression codec enum</param> public void JoinTiffImages(ArrayList imageFiles,string outFile,EncoderValue compressEncoder) { try { //If only one page in the collection, copy it directly to the target file. if (imageFiles.Count==1) { File.Copy((string)imageFiles[0],outFile,true); return; }
Bitmap bm=(Bitmap)Image.FromFile(strImageFile); pages.SaveAdd(bm,ep); bm.Dispose(); }
if(frame==imageFiles.Count-1) { //flush and close. ep.Param[0]=new EncoderParameter(enc,(long)EncoderValue.Flush); pages.SaveAdd(ep); }
frame++; } } catch (Exception ex) {#if DEBUG Console.WriteLine(ex.Message);#endif throw; } return; }
/// <summary> /// Remove a specific page within the image object and save the result to an output image file. /// </summary> /// <param name="pageNumber">page number to be removed</param> /// <param name="compressEncoder">compress encoder after operation</param> /// <param name="strFileName">filename to be outputed</param> /// <returns></</returns> public void RemoveAPage(int pageNumber,EncoderValue compressEncoder,string strFileName) { try { //Split the image files to single pages. ArrayList arrSplited=SplitTiffImage(this._TempWorkingDir,compressEncoder); //Remove the specific page from the collection string strPageRemove=string.Format("{0}\\{1}{2}.TIF",_TempWorkingDir,GetFileNameStartString(this._ImageFileName),pageNumber); arrSplited.Remove(strPageRemove);
JoinTiffImages(arrSplited,strFileName,compressEncoder); } catch(Exception) { throw; }
return; }
/// <summary> /// Getting the supported codec info. /// </summary> /// <param name="mimeType">description of mime type</param> /// <returns>image codec info</returns> private ImageCodecInfo GetEncoderInfo(string mimeType) { ImageCodecInfo[] encoders=ImageCodecInfo.GetImageEncoders(); for (int j=0;j<encoders.Length;j++) { if (encoders[j].MimeType==mimeType) return encoders[j]; } throw new Exception( mimeType + " mime type not found in ImageCodecInfo" ); }
/// <summary> /// Return the memory steam of a specific page /// </summary> /// <param name="pageNumber">page number to be extracted</param> /// <returns>image object</returns> public Image GetSpecificPage(int pageNumber) { MemoryStream ms=null; Image retImage=null; try { ms=new MemoryStream(); Guid objGuid=image.FrameDimensionsList[0]; FrameDimension objDimension=new FrameDimension(objGuid);
image.SelectActiveFrame(objDimension,pageNumber); image.Save(ms,ImageFormat.Bmp); retImage=Image.FromStream(ms);
return retImage; } catch (Exception) { ms.Close(); retImage.Dispose(); throw; } }
/// <summary> /// Convert the existing TIFF to a different codec format /// </summary> /// <param name="compressEncoder"></param> /// <returns></returns> public void ConvertTiffFormat(string strNewImageFileName,EncoderValue compressEncoder) { //Split the image files to single pages. ArrayList arrSplited=SplitTiffImage(this._TempWorkingDir,compressEncoder); JoinTiffImages(arrSplited,strNewImageFileName,compressEncoder);
/// <summary> /// Image file to operate /// </summary> public string ImageFileName { get { return _ImageFileName; } set { _ImageFileName=value; } }
/// <summary> /// Buffering directory /// </summary> public string TempWorkingDir { get { return _TempWorkingDir; } set { _TempWorkingDir=value; } }
/// <summary> /// Image page number /// </summary> public int PageNumber { get { return _PageNumber; } } #region IDisposable Members
public void Dispose() { image.Dispose(); System.GC.SuppressFinalize(this); }
#endregion}
