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Jerry Huang | All posts tagged 'barcode'

Jerry Huang apps and developing apps

scan barcode from TIFF

31. July 2010 09:25 by Jerry in Cool stuff

http://www.codeproject.com/KB/graphics/BarcodeImaging3.aspx

The ariticle above is really something awesome, you may easily scan barcode in an image, pure managed code. It supports Code39, Code39ex, Code128, EAN, EAN-2, EAN-5.

Together with below utility class, I used it in an application to scan barcode from tiff

Code
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using System;
using System.IO;
using System.Drawing;
using System.Drawing.Imaging;using System.Collections;namespace AMA.Util
{/// <summary>/// Summary description for TiffManager./// </summary>public class TiffManager : IDisposable{private string _ImageFileName;private int _PageNumber;private 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>/// 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+"<a href="file://\\"+GetFileNameStartString(_ImageFileName">\\"+GetFileNameStartString(_ImageFileName</a>);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 bitmapstring 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 encoderEncoder 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 framepages.Save(outFile,info,ep);}else{//save the intermediate framesep.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;}//use the save encoderEncoder 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 framepages.Save(outFile,info,ep);}else{//save the intermediate framesep.Param[0]=new EncoderParameter(enc,(long)EncoderValue.FrameDimensionPage);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 DEBUGConsole.WriteLine(ex.Message);
#endifthrow;}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 collectionstring 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);return;}/// <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 Memberspublic void Dispose(){image.Dispose();System.GC.SuppressFinalize(this);}#endregion}
}