Hi! .. I'd like to ask a question. I've noticed that JPEG2000 coefficients are in RGB color space. Is it possible for kdu software (kdu_compress) to save the...
... software ... such ... the ... Hi, kdu_compress with -jp2_space option can directly compress a RGB, YCbCr,LUM and restricted ICC profile images, not sure of...
Hi David: Since upgrading to Kakadu 5 we have had some trouble with some of our images. The scale we are sending to the compositor does not seem to correspond...
Hi all, Since I see that some people are still working with the FCD I just wanted to let everyone know that you can get a free copy of the standard from ITU...
I am having some trouble getting the documentation compiled on the Mac. It is a dual G5 with 785Mbytes of ram, running 10.4.2. I keep getting the following...
Don, While I was also initially unable to get the Kakadu 5.0 documentation to build under Mac OS X 10.4.2 using the Makefile-Darwin-Altivec-gcc that comes with...
... Hi, David I have two questions to ask you here . 1) In the early version(before 4.3) , the dwt_gcc is written directly by assembly language( maybe it is...
Hi , Yuan Meng Does the Intel c++ Compilier support AMD64 well ? Regards, Forrest ... inline ... platform ... library. ... optimizations for x86 ... processors...
Hello, forestcg, thanks for your attention. I admit that I know little about CPU acceleration, and my experiments were based on IPP5.0 demo-- its jpeg2000 vc...
I don't understand the correct use of the -rate option. In the message blow, you say the rate is relative to depth and compression ratio but i think the size...
I don't appear to have any problem loading the image in question through kdu_show (remotely or locally). I also don't have a problem loading the image locally...
hi, this is what i understand... lets consider a gray scale 256x256 image with 8 bit per pixel before compression.so the total file size before compression is...
How can I compress with kdu_compress images with compression ratio 100% 70% 50% e.t.c? I noticed the -rate <bits/pels> argument, but I've noticed too, that...
Hello, I've been reading the JPEG2000 book and papers published on JPEG2000 ROI. It seems Kakadu's implimentation (encoding) on Maxshift and scaling methods...
Hello, You said you are having grayscale images - let's suppose they are 8 bit images (with 256 gray levels). If you wish to get 1:100 compression ratio, the...
If by "default" you mean failing to specify a rate, then I would caution against saying that kdu_compress defaults to "near" lossless compression, simply...
Greg may be right and it might be better to stop using the phrase "near lossless compression" because it is always either lossless or not. About the...
I have a TIFF image 21600 columns by 32800 rows x 8 bit RGB = 1.98 GB, that I need to convert to a lossless (or irreversible) (Geo) JPEG2000 image containing 8...
... I believe the common term for this is "visually lossless". The decompressed image is not bit-for-bit identical to the original. However, it's so close to...
Greg, I think your wrong in assuming that people are using kdu_compress to accomplish this. "Many our clients have been compressing large GIS images using...
Please remember that kdu_compress is provided as a demonstration sample for how to use the Kakadu SDK core system. It is not designed, nor is it intended, to...
Question about tiles... ... I have been using tiles in the TIFF format for the purpose of being able to extract any portion of the image on demand. I can't...
Hi, I'd also suggest that it would be better to use a customised application. However, if your heart is set on using kdu_compress you could use the following...
Jim, The concept of subdividing a raster image into square or rectangular tiles is the same for TIFF and JPEG2000 images, but there are some implementation...
Hi, Having tiles in JPEG2000 means about the same as in TIFF. The original image is devided in blocks which are compressed totally individually. This is easily...
Hello everyone, I've seen very few threads on this subject and would like to see if I can get some help on it. For a group project we are trying to move kakadu...
... I ... It should be possible, but it's not a simple job. If possible, I'd recommend using the new Microsoft Visual Studio 2005. That's a much newer...
I am pleased to report that all that was necessary was adding the - flush_period option to kdu_compress. With the -flush_period option, kdu_compress accepts as...
1. In the example I originally gave, I stated that I was creating a losslessly compressed JPEG2000, so in that case there are no visible tile boundaries. 2. I...
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