does gvsig 1.11 open plain jp2 for you? do you have a small plain jp2 to play with?
ede On 21.09.2011 11:57, Rahkonen Jukka wrote: > Hi, > > I had a test with OpenJUMP-snapshot20110920-r2420-bin.zip on Windows Vista > 32-bit and Windows XP Pro 32-bit and jre 1.6.0_27. > > Test 1. > GeoJP2 (.jp2) images created with Kakadu kdu_compress. Original images have > been geotiffs and in this case kdu_compress is creating a GeoJP2 file with > included georeferencing info. > Result: 1-channel (black and white) and 3-channel images (RGB) are shown fine. > > Test 2. > JPEG2000 images created with ER Mapper Image Compressor 7.2 from > georeferenced images (tiff files with tfw). > Result: OK > > Test 3. > Non-georeferenced .jp2 files created with Kakadu and ER Mapper Image > Compressor. > Result: OpenJUMP seems to open the images (no error messager) but it does not > show them. Having a world file does not change the situation. I tried > worldfiles with the .j2w ectensions as well as .tfw with the same result - > image is not shown. > > Test 4. > I tried to convert on 3-channel 12000x12000 pixel image into .jp2 with > Geojasper (tif2jp2.bat). Procedure took very long and ended to program > termination with some system error message "memory can not be read". It may > be some hardware problem but first try with Geojasper was not very > inspirating. > > Test 5. > > FWTools 2.4.7 from http://fwtools.maptools.org comes with JP2ECW driver that > can write out JPEG2000 files. > I converted a test image (tiff+tfw) into .jp2 as > gdal_translate -of JP2ECW test.tif JP2ECW_test.jp2 > Result: OpenJUMP opens and shows the image with georeferencing. > > Note: This FWTools version writes also ECW and it is so old that the ECW > license at that time allowed converting source images which are less than 500 > GB in size into ECW. I am remenbering that ER Mapper had a free Image > Compressor 2.x with the same size limit. I would recommend downloading > FWTools 2.4.7 as long as it is available and keep it in a safe place for > future needs. > > Test 6. > OJ opens multi-channel .jp2 images (7 and 8 channel Landsat scenes) created > with Kakadu. Georeferencing is OK but the result is not usable because it is > not possible to select bands for viewing. One channel for grayscale or three > channels for RGB would make sense but not a grayscale presentation of all the > 7 channels in a pile. > > Test 7. > Simple .jpx and .jpf files can be used but not the more exotic variants. I > believe that these must also contain the internal georeferencing info but I > am not sure. It is also a long time since I have played with JPEG2000 and I > do not even remember for what these variants are usable. > > Test 8. > Unwrapped JPEG2000 code streams (.j2c, .j2k) cannot be viewed. Probably > because they are naturally lacking the georeferencing info. > > Conclusion: > OpenJUMP can show typical JP2 compatible 1-channel and 3-channel JPEG2000 > images if they include the georeferencing information internally (GeoJP2). > Such images can be created from geotiffs with Kakadu kdu_compress utility > which is free for personal use. Old versions of gdal_translate can be used > for creating OpenJUMP compatible .jp2 images with JP2ECW driver up to 500 GB > input file size. > Unfortunately OpenJUMP does not show at all images without georeferencing or > which have only .j2w world file for georeferencing. And unfortunately the > free Geojasper tool failed in my test. > > -Jukka Rahkonen- > > ------------------------------------------------------------------------------ > All the data continuously generated in your IT infrastructure contains a > definitive record of customers, application performance, security > threats, fraudulent activity and more. Splunk takes this data and makes > sense of it. Business sense. IT sense. Common sense. > http://p.sf.net/sfu/splunk-d2dcopy1 > _______________________________________________ > Jump-pilot-devel mailing list > Jump-pilot-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel ------------------------------------------------------------------------------ All the data continuously generated in your IT infrastructure contains a definitive record of customers, application performance, security threats, fraudulent activity and more. Splunk takes this data and makes sense of it. Business sense. IT sense. Common sense. http://p.sf.net/sfu/splunk-d2dcopy1 _______________________________________________ Jump-pilot-devel mailing list Jump-pilot-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel
