Aaron Boxer <boxerab <at> gmail.com> writes: > > Hello, > I recently started developing an open source jpeg2000 compression library using opencl. > I would like to base the library design on the very successful gdal library design. > Can anyone recomend any resources to help me to grok the high level design of gdal? > > Thanks so much, > Aaron
Hi, I would like to see something that is open source and fast with JPEG2000. I think that it would be OK to support only a subset of JPEG2000 standard if the basic operations would be super fast. I took just a moment ago some timings for another purpose but they may be interesting. I converted the same 12000x12000 pixel image (432 MB uncompressed) with a few different methods: GDAL (64-bit) from tiff to tiff: 3 seconds GDAL (64-bit) ECWJP2 (SDK 5.0) from lossless JPEG2000 to tiff: 21 seconds GDAL (64-bit) JP2KAK (SDK 7.3.2) from lossless JPEG2000 to tiff: 14 seconds Kakadu 7.3.2 (64-bit) kdu_expand from lossless JPEG2000 to tiff: 7 seconds. The new library with opencl should be at least as fast as ECWJP2 with GDAL but the faster the better. It is interesting to see that native Kakadu application was two times faster than GDAL with JP2KAK driver of the same Kakadu version. Of course the use case is very simple. -Jukka Rahkonen- _______________________________________________ gdal-dev mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/gdal-dev
