Hi, I am not Erwan, but I have done some experimentation with jpeg2000. There are really millions of ways to make a valid jpeg2000 file (even the baseline .jp2 file, not to mention the more featured .jpx format). All standard complient clients should open all baseline 'flavours' but unfortunately it is not always the case. An all too many software handle jpeg200 in very ineffective way. They for example try to decompress the image to some own memory or file structure instead of reading streams directly from jpeg2000 files. It may work fine with digital camera files but not with multi-gigabyte geospatial imagery. Jpeg2000 can be extremely fast to use and there is no need to accept slow solutions. Slowness is not due to jpeg2000 but poor implementation.
If you have geospatial imagery in mind, I would recommend to test mainly with big enough images, 10000 by 10000 pixels could be a minimum. ER Mapper compressor creates pretty good geospatial jpeg2000 files but you can use other tools as well. Jpeg2000 is, after all, a standard, even it really seems to be much easier to handle format like ER Mapper ECW that is always the same. What I believe is important with geospatial jpeg2000 is that the progression order should be RPCL of PCRL. Then there should be precincts in the image, and enough resolution levels. -Jukka- > -----Alkuperäinen viesti----- > Lähettäjä: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] > Puolesta Paul Austin > Lähetetty: 27. syyskuuta 2007 19:03 > Vastaanottaja: List for discussion of JPP development and use. > Aihe: Re: [JPP-Devel] Image Framework In OpenJUMP > > Hi Erwan, > > Have you done any experimentation with Jpeg2000, I tried some > experiments with imagemagik on linux and found that it's > difficult to get it to work with the many different flavours > of Jpeg200. For example the samples I had were generated by > ermappers codec and it could not read them. > > Cheers, > Paul > > > erwan bocher wrote: > > Dear all, > > > > The main pb for SIGLE that it needs gdal dlls. You can find a last > > version here but only for windows (sorry Stefan :-)). > > http://r1.bocher.free.fr/temp/bv_tanato/Tanato.zip > > > > With the IRSTV team we are finishing a new georaster > library based on > > imageJ. We want to publish the core in few days. It can be a good > > thing for OJ because we have : > > > > - processing system like crop, slope, accumulation grid, > convolution > > filter > > - utilities , rasterization, histogram, lookup table.. > > > > We read only worldfile but geotiff is under development. In the > > future we want to integrate geo jpeg2000. > > > > Feel free. > > > > R1. > > > > > > 2007/9/27, Giuseppe Aruta <[EMAIL PROTECTED]>: > > > >> Hi SS, > >> I did some test some months ago between the raster plugins. > >> > >> This is a comparition I did between Pirol Raster plugin and the > >> embedded "Add Image Layer" raster plugin in OpenJUMP > >> > >> What Pirol can do (and OpenJUMP not) > >> 1) support Transparency > >> 2) Support mask colour > >> 3) raster layers are saved in the project file > >> > >> What Add immegery layer does better (comparing to > >> Pirol) > >> 1) Support ECW (in windows, with ECW libraries) > >> 2) it seems faster in rendering. Expecially when I change the zoom > >> level > >> > >> I use the embedded "Add Image Layer" which seems useful > for regular > >> usage (expecially if you active ECW). > >> I use Pirol only if I need to set transparency and/or I > want to save > >> the project with raster layer (very rare). > >> I also had problems with Sigle plugin. As far as I remember Pirol > >> plugin and Sigle seemed to be in conflict each other. Try > to install > >> Sigle without Pirol. > >> Anyhow I never tested Sigle since embedded OJ raster > plugin does more > >> o less the same things and works fine. > >> ********************************************** > >> I hope that someone will manege one day the "bride" > >> between Prol and embedde raster plugins in order to have > the best of > >> both :-) > >> *********************************************** > >> > >> Peppe > >> > >> --- Sunburned Surveyor <[EMAIL PROTECTED]> ha scritto: > >> > >> > >>> What plug-ins are you guys using to view raster images in > OpenJUMP > >>> or its sister programs? > >>> > >>> I tried installing the Sigle Plug-In, but I still got JAI errors > >>> even after I installed JAI. (Maybe I installed the JAI > for the JDK > >>> and I needed to install it for the JRE.) Is anyone else > sucessfully > >>> using the Sigle Plug-In to view images? Could you offer > some tips on > >>> the corrext JAI installer to use? > >>> > >>> I also tried to view images in SkyJUMP, but when I zoom extents > >>> nothing is visible. > >>> > >>> In summary, the only JUMP flavor that I can use to view images > >>> currently is JUMP 1.2. > >>> > >>> I'm just wondering what others are using to view raster images in > >>> OpenJUMP, and if we might need to consider integrating > support for > >>> viewing raster images from JUMP 1.2 in OpenJUMP. > >>> > >>> The Sunburned Surveyor > >>> > >>> > >>> > >> > --------------------------------------------------------------------- > >> ---- > >> > >>> This SF.net email is sponsored by: Microsoft Defy all challenges. > >>> Microsoft(R) Visual Studio 2005. > >>> > >>> > >> http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ > >> > >>> _______________________________________________ > >>> Jump-pilot-devel mailing list > >>> Jump-pilot-devel@lists.sourceforge.net > >>> > >>> > >> https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel > >> > >> > >> ___________________________________ > >> L'email della prossima generazione? Puoi averla con la > nuova Yahoo! > >> Mail: http://it.docs.yahoo.com/nowyoucan.html > >> > >> > >> > --------------------------------------------------------------------- > >> ---- This SF.net email is sponsored by: Microsoft Defy all > >> challenges. Microsoft(R) Visual Studio 2005. > >> http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ > >> _______________________________________________ > >> Jump-pilot-devel mailing list > >> Jump-pilot-devel@lists.sourceforge.net > >> https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel > >> > >> > > > > > > > > > -------------------------------------------------------------- > ----------- > This SF.net email is sponsored by: Microsoft Defy all > challenges. Microsoft(R) Visual Studio 2005. > http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ > _______________________________________________ > Jump-pilot-devel mailing list > Jump-pilot-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel > ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2005. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Jump-pilot-devel mailing list Jump-pilot-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel
