Considerable progress has been made in image compression research since the publication of the original JPEG standard in 1996. Based on many of these improvements, the Part 1 baseline and Part 2 extensions of the JPEG2000 standard have recently been published. Our primary involvement in the standards process (we are currently working on Part 10 extensions for support of 3D and floating point scientific data) is directed at incorporating features and flexibility for scientific data coding applications, which is not a priority for many other participants.
One of the fundamental components of the JPEG2000 standard is a decorrelating wavelet transform, based on perfect reconstruction two-channel filter banks. While Part 1 of the JPEG2000 standard provides only two fixed filter banks, designed for good performance over a wide range of image types, the extensions in Part 2 of the standard allow the use of filter banks designed for specific applications (for example, multi-spectral satellite imagery or synthetic aperture radar data). The original draft of Part 2 excluded support for a large class of filter banks, which were believed to be incompatible with the framework of the baseline standard. Our research in this area lead to the development of an effective mechanism for supporting this class of filter banks.