Re: PDF Quality
Hi,
Gesendet: Fr, 14. Jan 2011
Von: Olivier DOREMIEUXoliv...@doremieux.org
I wasn't too happy with the quality of the generated PDF, especially
because I am generating the PDF from images, so I did play a little bit
with PDJpeg
In public PDJpeg(PDDocument doc, BufferedImage bi) throws IOException {
I did replace :
//ImageIO.write(bi, jpeg, os);
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();
The quality is much better. I think by default the compression quality
is 0.75
The PDF file is bigger. So maybe we could have a global parameter to set
the desired quality, and use it in iwparam.setCompressionQuality(1.0f);
Hope this help and which that change can be integrated.
Looks interesting. Thanks for the contribution. Please file an issue on JIRA [1]
and attach a patch containing a diff against the current trunk. Don't forget to
check the Grant license to ASF... checkbox.
BR
Andreas Lehmkühler
[jira] Commented: (PDFBOX-588) Problem extracting text in newline characters
[ https://issues.apache.org/jira/browse/PDFBOX-588?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=12981815#action_12981815 ] Mel Martinez commented on PDFBOX-588: - Wow. That is wierd. It only takes 40 seconds to extract from PDF Ref v1.7 on my box, with PDFBox v1.4.0. Do you maybe have a font file that is heavily fragmented or something like that? Problem extracting text in newline characters - Key: PDFBOX-588 URL: https://issues.apache.org/jira/browse/PDFBOX-588 Project: PDFBox Issue Type: Bug Components: Text extraction Affects Versions: 0.8.0-incubator, 1.3.1, 1.4.0 Environment: Win XP Reporter: Hesham Assignee: Andreas Lehmkühler Attachments: Enters-sample.pdf, PDFBOX588-Enters-sample.txt, PDFBOX588-Enters-sample1.png, PDFBOX588-Enters-sample1.png, PDFTextStripper.patch Hello , I have a PDF file with 1 page only, when I try to extract its text using : String pageData = stripper.getText( pdfFile ); It ignores some Enter characters between lines, so the last word in the line and the first word in the next line appear as 1 word without spaces between them !! While if I copy the PDF text manually from the PDF and paste it in a text editor, Enter characters appear after the same lines that caused the problem in PDFBox. Please check the attached file as a sample. Is there a way to fix this ? Best regards , -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.
[jira] Created: (PDFBOX-942) Image quality improvements
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
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.
[jira] Updated: (PDFBOX-942) Image quality improvements
[
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
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
[jira] Commented: (PDFBOX-588) Problem extracting text in newline characters
[
https://issues.apache.org/jira/browse/PDFBOX-588?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=12981910#action_12981910
]
Hesham commented on PDFBOX-588:
---
I do not know what is a fragmented font !
But i have created a sample project to test extracting text from the PDF
reference, and it took the same time i mentioned for the 2 PDFBox versions. I
do not understand how it works fine with you !
Here is my code :
private void readPDFButtonActionPerformed() {
try {
PDDocument pdfRef = PDDocument.load(
C:\\pdf_reference_1.7.pdf );
PDFTextStripper stripper = new PDFTextStripper();
for( int pageNum = 1; pageNum pdfRef.getNumberOfPages();
pageNum++ ) {
System.out.println( pageNum );
stripper.setStartPage( pageNum );
stripper.setEndPage( pageNum );
stripper.getText( pdfRef );
}
System.out.println( Done );
} catch (IOException e) {
e.printStackTrace();
}
}
Problem extracting text in newline characters
-
Key: PDFBOX-588
URL: https://issues.apache.org/jira/browse/PDFBOX-588
Project: PDFBox
Issue Type: Bug
Components: Text extraction
Affects Versions: 0.8.0-incubator, 1.3.1, 1.4.0
Environment: Win XP
Reporter: Hesham
Assignee: Andreas Lehmkühler
Attachments: Enters-sample.pdf, PDFBOX588-Enters-sample.txt,
PDFBOX588-Enters-sample1.png, PDFBOX588-Enters-sample1.png,
PDFTextStripper.patch
Hello ,
I have a PDF file with 1 page only, when I try to extract its text using :
String pageData = stripper.getText( pdfFile );
It ignores some Enter characters between lines, so the last word in the line
and the first word in the next line appear as 1 word without spaces between
them !!
While if I copy the PDF text manually from the PDF and paste it in a text
editor, Enter characters appear after the same lines that caused the problem
in PDFBox.
Please check the attached file as a sample.
Is there a way to fix this ?
Best regards ,
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
