[jira] Created: (PDFBOX-942) Image quality improvements

2011-01-14 Thread Olivier DOREMIEUX (JIRA) 
Image quality improvements
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 Key: PDFBOX-942
 URL: https://issues.apache.org/jira/browse/PDFBOX-942
 Project: PDFBox
  Issue Type: Bug
  Components: PDModel
Affects Versions: 1.4.0
Reporter: Olivier DOREMIEUX


The quality of the images inserted in a PDF documents could be improved by 
changing PDJpeg.java
In the API
public PDJpeg(PDDocument doc, BufferedImage bi) throws IOException

ImageIO.write(bi, jpeg, os);

could be replaced by :

  ImageWriter writer = null;
  Iterator iter = ImageIO.getImageWritersByFormatName(jpg);
  if (iter.hasNext()) {
  writer = (ImageWriter) iter.next();
  }
 
  ImageOutputStream ios = ImageIO.createImageOutputStream(os);
  writer.setOutput(ios);
 
  // Set the compression quality
  JPEGImageWriteParam iwparam = new 
JPEGImageWriteParam(Locale.getDefault());
  iwparam.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
  iwparam.setCompressionQuality(1.0f);
 
  // Write the image
  writer.write(null, new IIOImage(bi, null, null), iwparam);
 
  writer.dispose();

This increase the size of the generated PDF.
By default the JPEG quality is 0.75, in the patch I use 1.0, the maximum quality
As a suggestion the quality of the JPEG could be a global variable since it 
affect the size of the PDF


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[jira] Updated: (PDFBOX-942) Image quality improvements

2011-01-14 Thread Olivier DOREMIEUX (JIRA) 

 [ 
https://issues.apache.org/jira/browse/PDFBOX-942?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Olivier DOREMIEUX updated PDFBOX-942:
-

Attachment: PDJpeg.patch

 Image quality improvements
 --

 Key: PDFBOX-942
 URL: https://issues.apache.org/jira/browse/PDFBOX-942
 Project: PDFBox
  Issue Type: Bug
  Components: PDModel
Affects Versions: 1.4.0
Reporter: Olivier DOREMIEUX
 Attachments: PDJpeg.patch


 The quality of the images inserted in a PDF documents could be improved by 
 changing PDJpeg.java
 In the API
 public PDJpeg(PDDocument doc, BufferedImage bi) throws IOException
 ImageIO.write(bi, jpeg, os);
 could be replaced by :
   ImageWriter writer = null;
   Iterator iter = ImageIO.getImageWritersByFormatName(jpg);
   if (iter.hasNext()) {
   writer = (ImageWriter) iter.next();
   }
  
   ImageOutputStream ios = ImageIO.createImageOutputStream(os);
   writer.setOutput(ios);
  
   // Set the compression quality
   JPEGImageWriteParam iwparam = new 
 JPEGImageWriteParam(Locale.getDefault());
   iwparam.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
   iwparam.setCompressionQuality(1.0f);
  
   // Write the image
   writer.write(null, new IIOImage(bi, null, null), iwparam);
  
   writer.dispose();
 This increase the size of the generated PDF.
 By default the JPEG quality is 0.75, in the patch I use 1.0, the maximum 
 quality
 As a suggestion the quality of the JPEG could be a global variable since it 
 affect the size of the PDF

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You can reply to this email to add a comment to the issue online.