JPEG2000 source based on DWT

I want to know the JPEG2000 source written in Matlab.Or related information about JPEG2000 based on DWT.Please help.Thanks.

[Walter Roberson]

JPEG 2000 has a number of patent claims against it, with some of the claimants having given limited patent licenses and some of the claimants still not even having said anything other than "You are violating our patent". As best I can tell it is not possible to get a list of the licenses or the patent claims without purchasing the JPEG 2000 specification and by so doing agreeing to the "click-wrap" licenses.

In the organization I used to work for, it was absolutely completely forbidden to agree to license terms without having had an opportunity to read the license terms. A lot of other organizations have similar principles .

Because of these legal issues it is difficult for people to assist with anything to do with JPEG 2000.

[Lee Cindy]

OK.Got it.And thanks again for your answer.

I want to make sure if we can got the JPEG source freely.

Answer 1

[Walter Roberson]

I have never yet encountered a JPEG2000 implementation written in MATLAB; I have looked several times in response to queries here. The closest I have found is a MATLAB interface to C (C++ ?) source.

[Lee Cindy]

Thanks.Can u share it with me?

[Walter Roberson]

http://www.mathworks.com/matlabcentral/fileexchange/2682

[Lee Cindy]

Thanks.

Answer 2

[Image Analyst]

Why jpeg2000? PNG is becoming the standard these days. It's lossless compression (like jpeg2000), and has no license issues, so what's not to like? I'd recommend you use PNG. When I create images, that's all I use.

[Lee Cindy]

Thanks. Because I want to do wavelet(DWT) coefficient quantization,and I found that JPEG2000 may have the related process with wavelet coefficient quantizatiion,just like DCT with JPEG. But still now I couldn't find the method to do that.Can u help?

[Image Analyst]

I don't have the wavelet toolbox, and am not familiar with the JPEG2000 code. I'm not into developing new image storage formats, so I don't delve into the details of them, and leave that up to people who do develop formats. I just use the formats after they've been developed and become de facto standards. Sorry but I can't help.

[Lee Cindy]

Thanks.