Fork of openjpeg library for JPEG2000 encoding and decoding https://git.carlh.net/cgit/openjpeg/atom?h=floating_point_irreversible_encoding 2020-04-21T13:55:44Z 2020-04-21T13:55:44Z Even Rouault even.rouault@spatialys.com 2020-04-21T13:55:44Z urn:sha1:4edb8c83374f52cd6a8f2c7c875e8ffacccb5fa5 * -PLT switch added to opj_compress * Add a opj_encoder_set_extra_options() function that accepts a PLT=YES option, and could be expanded later for other uses. ------- Testing with a Sentinel2 10m band, T36JTT_20160914T074612_B02.jp2, coming from S2A_MSIL1C_20160914T074612_N0204_R135_T36JTT_20160914T081456.SAFE Decompress it to TIFF: ``` opj_uncompress -i T36JTT_20160914T074612_B02.jp2 -o T36JTT_20160914T074612_B02.tif ``` Recompress it with similar parameters as original: ``` opj_compress -n 5 -c [256,256],[256,256],[256,256],[256,256],[256,256] -t 1024,1024 -PLT -i T36JTT_20160914T074612_B02.tif -o T36JTT_20160914T074612_B02_PLT.jp2 ``` Dump codestream detail with GDAL dump_jp2.py utility (https://github.com/OSGeo/gdal/blob/master/gdal/swig/python/samples/dump_jp2.py) ``` python dump_jp2.py T36JTT_20160914T074612_B02.jp2 > /tmp/dump_sentinel2_ori.txt python dump_jp2.py T36JTT_20160914T074612_B02_PLT.jp2 > /tmp/dump_sentinel2_openjpeg_plt.txt ``` The diff between both show very similar structure, and identical number of packets in PLT markers Now testing with Kakadu (KDU803_Demo_Apps_for_Linux-x86-64_200210) Full file decompression: ``` kdu_expand -i T36JTT_20160914T074612_B02_PLT.jp2 -o tmp.tif Consumed 121 tile-part(s) from a total of 121 tile(s). Consumed 80,318,806 codestream bytes (excluding any file format) = 5.329697 bits/pel. Processed using the multi-threaded environment, with 8 parallel threads of execution ``` Partial decompresson (presumably using PLT markers): ``` kdu_expand -i T36JTT_20160914T074612_B02.jp2 -o tmp.pgm -region "{0.5,0.5},{0.01,0.01}" kdu_expand -i T36JTT_20160914T074612_B02_PLT.jp2 -o tmp2.pgm -region "{0.5,0.5},{0.01,0.01}" diff tmp.pgm tmp2.pgm && echo "same !" ``` ------- Funded by ESA for S2-MPC project 2017-09-19T15:06:19Z Even Rouault even.rouault@spatialys.com 2017-09-19T14:52:07Z urn:sha1:7e2b6bebff12eab8bdc17fc9af017e8c11652f4f This adds a opj_set_decoded_components(opj_codec_t *p_codec, OPJ_UINT32 numcomps, const OPJ_UINT32* comps_indices) function, and equivalent "opj_decompress -c compno[,compno]*" option. When specified, neither the MCT transform nor JP2 channel transformations will be applied. Tests added for various combinations of whole image vs tiled-based decoding, full or reduced resolution, use of decode area or not. 2017-07-30T17:46:52Z Even Rouault even.rouault@spatialys.com 2017-07-30T17:46:52Z urn:sha1:13cde9fa37249628af6b6f10601b733f87a025f4 2017-05-15T10:21:30Z Even Rouault even.rouault@spatialys.com 2017-05-15T10:21:30Z urn:sha1:3c2972f924857016bb454201c7e92f25de9105ee 2016-05-25T19:02:07Z Even Rouault even.rouault@spatialys.com 2016-05-25T14:36:47Z urn:sha1:d4b7f03cfa4732132767188782683f3d957da912 By default, only the main thread is used. If opj_codec_set_threads() is not used, but the OPJ_NUM_THREADS environment variable is set, its value will be used to initialize the number of threads. The value can be either an integer number, or "ALL_CPUS". If OPJ_NUM_THREADS is set and this function is called, this function will override the behaviour of the environment variable. 2014-09-19T10:26:35Z Antonin Descampe antonin@gmail.com 2014-09-19T10:26:35Z urn:sha1:6868ee373ecc69ac472b6d61decc4741723c1540 2014-04-03T15:30:57Z Antonin Descampe antonin@gmail.com 2014-04-03T15:30:57Z urn:sha1:d19a4ab6768c48b542c0add922eba0dcddae9ffe 2014-03-07T09:44:32Z Mathieu Malaterre mathieu.malaterre@gmail.com 2014-03-07T09:44:32Z urn:sha1:a7b051b172b7d8d1171729732e5b29aa80600d08 Fixes issue 253