How is bitsPerRate set for PDF to TIFF conversion?

Question

I need to convert a PDF to a group 4 TIFF. I found certain objects I need to set to accomplish this (code is below). I am getting the exception below when performing the "write sequence" methon on the TIFF writer. I am wondering if anyone can offer any insight on how the bits per sample property is set and how can i change it?<br>:<br>
Thanks:<br>:<br>
Brian<br>
EXCEPTION:<br>
<br>
javax.imageio.IIOException: Bits per sample must be 1 for T4 compression!<br>
at com.sun.media.imageioimpl.plugins.tiff.TIFFT4Compressor.encode(TIFFT4Compressor.java:219)<br>
at com.sun.media.imageioimpl.plugins.tiff.TIFFImageWriter.writeTile(TIFFImageWriter.java:1256).<br>
at com.sun.media.imageioimpl.plugins.tiff.TIFFImageWriter.write(TIFFImageWriter.java:1555)<br>
at com.sun.media.imageioimpl.plugins.tiff.TIFFImageWriter.writeInsert(TIFFImageWriter.java:1683)<br>
at com.sun.media.imageioimpl.plugins.tiff.TIFFImageWriter.writeToSequence(TIFFImageWriter.java:1598)<br>
<br><br>
CODE:<br>
<br>
public static byte[] PDFToImage(byte[] bai, String imageType) <br>
{<br>
byte[] out = null; <br>
try <br>
{<br>
     PdfDecoder decoder = new PdfDecoder();<br>
     decoder.openPdfArray(bai);<br>
     if(decoder.isFileViewable()) <br>
     {<br>
          ByteArrayOutputStream baos = new ByteArrayOutputStream();<br>
          ImageOutputStream ios = ImageIO.createImageOutputStream(baos);<br>
          boolean foundWriter = false;<br>                    
          Iterator writerIter = ImageIO.getImageWritersByMIMEType("image/" + imageType);<br>
          while (writerIter.hasNext() && !foundWriter) <br>
          {<br>
               foundWriter = true;<br>
               TIFFImageWriter writer = (TIFFImageWriter)writerIter.next();<br>
               writer.setOutput(ios);<br>
               TIFFImageWriteParam param = new TIFFImageWriteParam(new Locale("en"));<br>
               param.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);<br>
               param.setCompressionType("CCITT T.4");<br>
               param.setCompressionQuality(1);<br>
          writer.prepareWriteSequence(null);<br>
               for (int i = 0; i < decoder.getPageCount(); i++) <br>
               {<br>
                    int pageNumber = i + 1;<br>
                    BufferedImage image = decoder.getPageAsImage(pageNumber);<br>
                    IIOImage iioImage = new IIOImage(image, null, null);<br>
                    try{<br>
                         writer.writeToSequence(iioImage, param);<br>
                    }catch(Exception e){<br>
                         throw e;<br>
                    }<br>
                    if(i==2)<br>
                    break;<br>
               }<br>
               writer.endWriteSequence();<br>
               ios.flush();<br>
               writer.dispose();<br>
               ios.close();<br>
               out = baos.toByteArray();<br>
          }<br>
          if (!foundWriter) <br>
          {<br>
               throw new RuntimeException("Error: no writer found for image type '"
                                   + imageType
                                   + "'");<br>
          }<br>
     }<br>
     decoder.closePdfFile();<br>
} <br>
catch (Exception e) <br>
{<br>
     e.printStackTrace();<br>
}<br>
return out;<br>
}<br>
Message was edited by:
breaknine

Answer 1

I'm facing same problem!!!