PDF to PNG conversions of poor quality

Ask for help and post your question on how to use XnView Classic.

Moderators: XnTriq, xnview

Post Reply
BlueMax
Posts: 7
Joined: Sun Aug 26, 2012 1:00 am

PDF to PNG conversions of poor quality

Post by BlueMax » Sat Sep 08, 2012 9:50 pm

We have a number of PDF files that we are converting to PNG for use on our website. When using our PDF program (PDF Professional Converter) we can select the resulting resolution of the PNG and get optimal results. However, when we use XnVIEW to perform the conversions (individual or batch), the conversion dialog offers no option for effectively specifying a resulting resolution that helps the text.

Worse yet, whatever resolution XnVIEW is defaulting to is producing a poor image with course text that is hard to read. We also tried specifying a DPI value on the 'Transformations' tab of 300 dpi in the conversion dialog. This creates a huge file, but the resolution of the text is not any better. Does anyone know how to control the resulting resolution of the text in the PNG file when converting from PDF to PNG? (PDF Converter can do it, so XnVIEW should also)

User avatar
Peter2
XnThusiast
Posts: 1136
Joined: Thu Nov 24, 2005 3:07 pm
Location: CH

Re: PDF to PNG conversions of poor quality

Post by Peter2 » Sun Sep 09, 2012 4:21 pm

What are the DPI settings in "Options - General - Read/Wrtite - Read EPS/PS/AI/PDF"? Try the conversion with a higher value ...

Peter
XnView 2.48 German, Win 7 x64 Prof. / Win 10

eL_PuSHeR
Posts: 267
Joined: Sat Apr 25, 2009 9:23 am

Re: PDF to PNG conversions of poor quality

Post by eL_PuSHeR » Mon Sep 10, 2012 6:18 am

A workaround would be getting XPDF and then extracting all bitmaps from PDF using PDFimages and then converting them back to PNG with XnView.
Intel i7 5960X
Gigabye GA-X99-Gaming 5
8 GB DDR4 (2100)
GeForce GTX 970 (Gigabyte)

BlueMax
Posts: 7
Joined: Sun Aug 26, 2012 1:00 am

Re: PDF to PNG conversions of poor quality

Post by BlueMax » Mon Sep 10, 2012 5:30 pm

Peter2 wrote:What are the DPI settings in "Options - General - Read/Wrtite - Read EPS/PS/AI/PDF"? Try the conversion with a higher value ...Peter
Thank you Peter, you resolved the problem for us! We had no idea that the conversion program was also modifying the SOURCE document as an INPUT. Our focus was all over managing the output. We understand the program a little bit better now, thank you again for your insights.

User avatar
Peter2
XnThusiast
Posts: 1136
Joined: Thu Nov 24, 2005 3:07 pm
Location: CH

Re: PDF to PNG conversions of poor quality

Post by Peter2 » Mon Sep 10, 2012 8:23 pm

BlueMax wrote:...Thank you Peter, you resolved the problem for us! We had no idea that the conversion program was also modifying the SOURCE document as an INPUT....
Your welcome. Some month ago I had the same problem ...

Peter
XnView 2.48 German, Win 7 x64 Prof. / Win 10

User avatar
DOS386
Posts: 291
Joined: Sun Jun 11, 2006 2:43 pm

Re: PDF to PNG conversions of poor quality

Post by DOS386 » Mon Sep 24, 2012 8:35 am

eL_PuSHeR wrote:A workaround would be getting XPDF and then extracting all bitmaps from PDF using PDFimages and then converting them back to PNG with XnView
Alternatively, use PDFDRAW tool from MUPDF :-)
There is indeed no WinZIP under my rock.

eL_PuSHeR
Posts: 267
Joined: Sat Apr 25, 2009 9:23 am

Re: PDF to PNG conversions of poor quality

Post by eL_PuSHeR » Wed Sep 26, 2012 7:18 am

Intel i7 5960X
Gigabye GA-X99-Gaming 5
8 GB DDR4 (2100)
GeForce GTX 970 (Gigabyte)

Post Reply