MQ codec of JPEG 2000

Matlab community,

I am a student working on JPEG 2000 image compression scheme using matlab. I have written the code as per the guidelines specified in the standard. Everything is working fine except the mq codec. My program is giving me the correct results most of the time but occasionally, giving errors.

I have taken the (cx,d) pairs generated from the EBCOT coder after coding of an 4X4 block and gave these pairs as an input to the mq encoder. After decoding, the decoder is giving erroneous decision values for some contexts. I am unable to find out where the actual problem is.

Please help me with this, since I do not have much time left to complete my project.

[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 work for, it is 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.