Hi
Ok I will try and explain the process as clear as I can.
Thanks for looking so far.
1) It starts of by loading the pdf and rendering the pages into
Buffered Images which are added to an
ArrayList(this.docList). The ArrayList (this.docList is sent to a method
(DisplayDocs2).
public JPanel *makeDocument*() throws IOException, FileNotFoundException{
File target = new File(filePath);
PDDocument pddocument = PDDocument.load(target);
JPanel displayView = new JPanel();
//try (PDDocument pddocument = PDDocument.load(target)) {
PDFRenderer pdfrend = new PDFRenderer(pddocument);
for (int i = 0; i < pddocument.getNumberOfPages(); i ++){
BufferedImage pageImage =
pdfrend.renderImageWithDPI(i,300,ImageType.RGB);
this.docList.add(pageImage);
}
displayProcessing = new DisplayDocs2(this.docList);
displayView = displayProcessing.getPanel();
pddocument.close();
return displayView;
}
2) In (DisplayDocs2) the Buffered Image in (docList) are painted
onto a JPanel. This JPanel is returned via
(Doc_processing) to a class called (FileMenu) where it is processed for
Display.
@Override
protected void paintComponent(Graphics g){
super.paintComponent(g);
if (docList.get(0).getWidth() > docList.get(0).getHeight()){
imageWidth = 900;
imageHeight = 595;
}
if (this.createdImage == null){
this.createdImage = new
BufferedImage(imageWidth,imageHeight*docList.size()*zoomup,
BufferedImage.TYPE_INT_ARGB);
}
Graphics g2 = this.createdImage.createGraphics();
if (controlWhichImage == 1){
for(BufferedImage eachImage : docList){
//Draw image on JPanel at the same time draw image on
this.createdImage
//g.drawImage(eachImage,
0,inty,imageWidth,imageHeight,this);
g2.drawImage(eachImage,0,inty,imageWidth,imageHeight,this);
intx += eachImage.getWidth();
inty += eachImage.getHeight();
}
There is no problem with pdf's that are produced on a computer the
problem comes when I try to view a scanned document.
I hope I have made this clear enough.
Gerry
On 20.09.2017 18:21, Tilman Hausherr wrote:
Hi,
Maybe explain what your "program" is. Explain the whole sequence from
start to finish. PDFBox doesn't reduce image quality if you just
loaded and saved a PDF.
Could it be that you created an image from a PDF, then created a PDF
from this image? If yes, then take care to render at a good dpi the
first time.
Tilman
Am 20.09.2017 um 18:12 schrieb [email protected]:
Hi
My PDF is the result of loading it into my program and then saving it
with the program. When I use document viewer it is clear, it is only
when I put it through my program that the file size is reduced from
1.2mB to 532.4kB ?
Gerry
-------- Forwarded Message --------
Subject: Re: pdf shows as very pixelated
Date: Wed, 20 Sep 2017 17:54:06 +0200
From: Tilman Hausherr <[email protected]>
Reply-To: [email protected]
To: [email protected]
Hi,
Your PDF is made from a low resolution scan, or from a hires image
that was reduced poorly. It looks bad even with Adobe Reader. The
size of the image within the PDF is 842 x 595. A good scan (300dpi)
is 3508 x 2480 pixels.
Tilman
Am 20.09.2017 um 17:42 schrieb [email protected]:
Hi
The link to my pdf is:
http://www116.zippyshare.com/v/WdY6AYy7/file.html
Regards
Gerry
On 20.09.2017 17:27, Tilman Hausherr wrote:
Hi,
http://filedropper.com/
Tilman
PS: please keep it on list. This is a recent flaw in thunderbird,
get the "reply to list" icon.
Am 20.09.2017 um 17:22 schrieb [email protected]:
Hi Tilman
Thanks for your quick reply.
Could you please give me the name of a Sharehoster you like to use
and I will post a pdf on there.
Thanks
Gerry
On 19.09.2017 18:11, Tilman Hausherr wrote:
Hi,
Please try again with 2.0.7. If it doesn't work as wished, please
upload the PDF to a sharehoster.
Tilman
Am 19.09.2017 um 17:44 schrieb Gerry:
Hi
I am using pdfbox-app-2.0.0 in my program.
I am using the following code:
public JPanel makeDocument() throws IOException,
FileNotFoundException{
File target = new File(filePath);
PDDocument pddocument = PDDocument.load(target);
JPanel displayView;
PDFRenderer pdfrend = new PDFRenderer(pddocument);
for (int i = 0; i < pddocument.getNumberOfPages(); i
++){
//BufferedImage pageImage =
pdfrend.renderImage(i,0.9f);
BufferedImage pageImage =
pdfrend.renderImageWithDPI(i,300);
this.docList.add(pageImage);
}
displayProcessing = new DisplayDocs2(this.docList);
displayView = displayProcessing.getPanel();
pddocument.close();
return displayView;
}
when I use this code to open a computer produced pdf (with a
white background) it works fine.
But when I try to open a pdf which was a scanned page it come
out pixelated and pretty much unreadable like grey instead of
white background has an effect.
Any help gratefully received. Sorry for my bad descriptive
skills I am learning as I go.
Gerry
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