Looks like a raw JPEG2000 code-stream to me. Cheers, david ... David Taubman Senior Lecturer, School of Electrical Engineering and Telecommunications The...
Hi, In the following routine void kd_block_encoder::encode(kdu_block *block, bool reversible, double msb_wmse, kdu_uint16 estimated_threshold) before for the...
Hello, I ran into a problem with a VC++ application that might be interesting to others in similar situations. This application started failing during its JP2...
I have a program to manipulate NITF files. I took the Independent JPEG groups JPEG software and converted it to read and write blocks from a file, and to...
Hi Sunil, Good question, to which I cannot give you a good answer off the top of my head. Ultimately, this is just a normalization factor, which affects the ...
HI Russ, Firstly, you should appreciate that JPEG2000 is fundamentally much more complex than JPEG. I am surprised that the ratio between JPEG and JPEG2000...
Dear Mr. Taubman, I am studying the parallel structure of T1(make 3 coding pass decision in just one scan, encoding side) currently. You mentioned it can be...
Wei Wang
rickwwang@...
Feb 10, 2003 2:10 am
984
Hello, I am trying to understand the compression rate achieved by kdu_compress. The following table is the result of using kdu_compress on a 24 BPP photograph...
Hello group, I need a server that talks JPIP and can be (cross)compiled to the linux-arm platform. My goal is to demonstrate kdu_show running on Windows as the...
Hi Larry, This is one of the most commonly asked questions. The answer is that rate control happens only after the sample values have been quantized and...
Can I use the demo of Kakadu to compress image with multi channel in different resolution (all power of 2)? I know that JPG2000 support this feature, but can I...
Yes, you can do this with "kdu_compress" without any difficulty. Just put each channel in a separate PGM of BMP file (can be done with raw files of any...
Thanks, In this case, what is the syntex when I want to extract a rigion from of a specific channel (e.g medium.pgm)? The purpce is to work with very big...
Hi All, I am writing a parser for the jpeg2000 bit stream for post processing. Can any one help me on interpreting the packet header for the situation (I could...
I got some problems when I try it: 1) The time it takes to expand part from a small image is the same time as expand the same part from the big image. Why? 2)...
... Not sure what you mean. Wouldn't you expect this? ... Use `-raw_components'. Cheers, David ... David Taubman Senior Lecturer, School of Electrical...
I'll try a gain, Let say I have 3 images: Big(1000x1000), Med(500x500) and Small (250x250). If I compress only the 'Big' file with 'Stiles{250,250}' option, ...
HI Gal, Still you are not telling me what you mean by "compression performance". You are decompressing, not compressing, so what is your performance measure. ...
Hi again, When I'm talking about "performance" I'm interesting on the time it takes to finish the operation (usually expand). The application I do is a large...
Dr. Taubman, Could you please briefly outline the development plans for the next few releases of Kakadu? It would be useful to avoid redundant work by Kakadu...
Hi Gal, Since you are interested in speed of decompressing a small region from a large image, you should provide sufficient pointer information in the...
Dear Mr. Taubman, I am studying the parallel structure of T1(make 3 coding pass decision in just one scan, encoding side) currently. You mentioned it can be...
Hi Dwight, This is a good question. Version 3.5 has been a long time coming and will not be able to be released until some time in the second half of March....
Does someone Know where I can find more details abou jpeg 2000 internet protocol(jpip)...because I'm trying to implement it for wireless devices suppoting...
docdestin <docdestin@...
docdestin@...
Feb 17, 2003 4:04 pm
1002
Hi David, I think I need to read the book of JPG2000 in order to understand all the advance features that used in examles (r) & (t). Any way, can you (or...
HI Gal, I can't see why you can't try this yourself. Just use the example command lines given, decompress and measure the CPU time on your favourate machine. ...
JPIP is still in the working draft phase, and working drafts are not public documents, as far as I am aware. In any event, there are quite a few things which...
Hi! Does annyone know if it is possible to get the number of bytes used by each resolution in a JPEG2000 file. To clarify: I use the progression order RLCP to...
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