Hi, I have attached a copy of my generated TIFF. Note, if I remove <transparent-page-background> from my config it makes no difference.
If I set the resolution and compression via the code (via TIFFRenderer), rather than via a config file the image quality is much improved. I can't explain this! Thanks Jeremias Maerki-2 wrote: > > I've produced the attached TIFF image with FOP Trunk (pretty much > equivalent to FOP 1.0) with practically the same configuration as you, > except for the > <transparent-page-background>true</transparent-page-background> > which you should remove. > > If by poor quality you mean the bi-level rendering by using a lightness > threshold, > that could be improved by rendering the bitmap internally in gray scales > and then rasterize it using Bayer or error-diffusion rastering. We have > code for that but it's not tied into the bitmap renderers and it would > also cost a lot of performance and allow much poorer compression levels. > > Maybe you should post an image to demonstrate what you consider poor > quality. > > On 05.10.2010 00:25:27 paulnnosh wrote: >> >> To add some additional information. I have now downgraded to 0.95 and >> while >> the black pages have gone the image quality is still very bad. I noticed >> that the log output states: >> >> 04-Oct-2010 21:30:56 org.apache.fop.render.java2d.Java2DRenderer >> getPageImage >> INFO: Rendering Page 1 (pageWidth 595, pageHeight 842) >> >> Which if I'm not mistaken is only 72dpi for an A4 page. I have set the >> target-resolution to 200dpi so I don't understand why the image is so >> bad. >> >> Thanks again... >> >> >> paulnnosh wrote: >> > >> > Hi, >> > >> > I'm using FOP 1.0 with Java 1.4 (I know, I know! I'm stuck with it for >> > now). >> > >> > I'm using FOP to convert XML into a CCITT T.6 compressed TIFF. >> > >> > With the config file below the output TIFF files are just coloured >> black. >> > >> > I can remove the transparent-page-background tag and that produces an >> > image but the quality is very very poor. >> > >> > I have Imageio version 1.1 on my classpath. >> > >> > My config is as follows: >> > >> > <fop version="1.0"> >> > <source-resolution>72</source-resolution> >> > <target-resolution>200</target-resolution> >> > <renderers> >> > <renderer mime="image/tiff"> >> > <transparent-page-background>true</transparent-page-background> >> > <compression>CCITT T.6</compression> >> > </renderer> >> > </renderers> >> > </fop> >> > >> > Can anyone shed any light on what the problem is here please? Any help >> > much appreciated. >> > >> > Many Thanks >> > >> >> -- >> View this message in context: >> http://old.nabble.com/FOP-1.0-TIFF-Image-Black-Pages-and-Poor-Image-Quality-tp29881437p29882800.html >> Sent from the FOP - Users mailing list archive at Nabble.com. >> > > > > Jeremias Maerki > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: fop-users-unsubscr...@xmlgraphics.apache.org > For additional commands, e-mail: fop-users-h...@xmlgraphics.apache.org > http://old.nabble.com/file/p29929378/C25C%2B-%2Bpoor%2Bquality.tiff C25C+-+poor+quality.tiff -- View this message in context: http://old.nabble.com/FOP-1.0-TIFF-Image-Black-Pages-and-Poor-Image-Quality-tp29881437p29929378.html Sent from the FOP - Users mailing list archive at Nabble.com. --------------------------------------------------------------------- To unsubscribe, e-mail: fop-users-unsubscr...@xmlgraphics.apache.org For additional commands, e-mail: fop-users-h...@xmlgraphics.apache.org
