Dear David, I have made a simple program which takes jpc streams and produce mj2 file. Jpc streams are tiled images {128,128} When I decompress my mj2 file...
HI Yoav, You should not expect any signficant decompression speed differences. The main advances have been in features and memory efficiency for compression. ...
Hi Ettendu, I understand that you do not want to use it for commercial purposes, but for reasons of fairness and keeping track of copies, we have a standing...
Dear Dr. Taubman, I'm a student and I'm developing a Jpeg2000 application for a mobile phone. I'm using Java. I'm trying to implement a jpip client to download...
Mike, For those of us attempting to compile Kakadu on OS X, it would be very helpful if you would post your compiler flags used, solutions to problems etc, to...
djr333a
dave@...
May 5, 2003 9:39 pm
1172
I'm looking at various JPEG2000 packages to incorporate into an application where (small) size is important. Looks like the kdu .dll is about 300KB. What...
Hi. Sure thing. Here's the relevant bits of my makefile in "coresys/make": KDU_GLIBS = CC = gcc INCLUDES = -I../common C_OPT = -O2 -Wno-uninitialized...
You could probably get it down under 300 KBytes, but it would be at least 200 kBytes. Cheers, david ... David Taubman Senior Lecturer, School of Electrical...
Hi, Is it possible to specify absolute step sizes for each subband for each component? I assume you can but when I tried it I get the following warning: Kakadu...
I am trying to use kakadu for compressing 16 bit gray scale images of DICOM FILE. I extracted the pixel data and i am storing it in a raw file. I am having...
comhari
comhari@...
May 9, 2003 5:38 am
1178
is Kdu_compress expects Big endian for raw only. or for all other images...
comhari
comhari@...
May 9, 2003 5:57 am
1179
Hi Comhari, "kdu_show" has no trouble viewing 16-bit (or more) images on an 8-bit per sample display. It simply reconstructs at the appropriate bit-depth. ...
Thank you for your reply. I am having the sampe problems again. Let me explain you what i did. I am having the raw pixel data in my file. Ht = 256 wdth =...
comhari
comhari@...
May 9, 2003 9:49 am
1181
As you know dicom has only 12 bits so I suggest you get rid of all other bits, i.e. in your case bit 16 (or 15 depending on how you count). That might fix your...
Thank you. I compressed the dicom raw to a j2c and after decompression i viewed in my Dicom Viewer it seems to work fine. But the j2c file comes as full gray...
comhari
comhari@...
May 10, 2003 6:36 am
1183
Kakadu is showing the image. The problem is that your data uses maximum 4096/65536=1/16 of the total 16-bit range. So everything shows up with very little...
Hi, I'm using kdu_show to view a very big image. The image is 20000x40000 pixels, 8 bit, and was compressed using kdu_compress with tiles (1024x1024 pixels),...
Hello, sorry for that rookie question but I would like to know how to get the pixel value at a certain position. I read in and displayed a .jp2 image. However,...
Hi Yoav and all, I also have a problem when I working with the "kdu_expand.exe" on a big file that was compress with tiles. In this case, if I using 'region'...
HI Lars, Perhaps the best suggestion for you would be to use the "kdr_region_decompressor" object, configured to decompress a small region of the image...
Hi Yoav, If you do not include pointer marker segments into a JPEG2000 code-stream, Kakadu will parse linearly through it, storing all the intermediate...
HI Gal, Same answer applies to your application. You might like to include TLM marker segments as well, using the "make_tlm" post-processing application. But...
Hello, I'm trying kakadu programs and looking the messages on this forum also, and it seems like kaekadu doesn't support alpha channels at the moment. This is...
This is not a problem with kakadu, which can decode the alpha channel okay. It's a question of what the application built using kakadu chooses to do with it....
Hi again, well, I tried before sending the first post fnord plugin, and it doesn't save properly the alpha channel (or I'm missing something), it flattens to...
Hi Georges, It is not really true that Kakadu does not support alpha channels. Alpha channels are described in the JP2/JPX formats in terms of "opacity" and/or...
Hi David, thanks for your answer. Your explanation is what I guessed from some posts, since I haven't yet the sdk. I surely understand that kakadu is fully...
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