Description

BBTools is a Matlab-toolbox for large-scale computations with a black-box operator. A black-box operator is an operator that can be accessed only through a pair of routines that compute matrix-vector multiplications.

At NRU we use this for research in new reconstruction algorithms for PET and SPECT. However, the toolbox should be useful for many other fields such as inverse problems in general, and dimensionality reduction of large data sets (e.g. latent semantic indexing).

Online documentation

You can see a web-version of the online documentation here. Please note that the documentation is designed to be used from Matlab. The online version is only an approximation to the experience.

Platforms

BBTools will now support the AMD64 architecture under Linux. Although untested, AMD-clones by Intel should also be supported. Thus the following platforms are supported out of the box:

• Windows/PC (64-bit is not yet native)
• Linux/PC (32- and 64-bit native)
• HP/HPUX

Funding

The development of the toolbox would not be possible without the financial support from the following organizations:

• EU 6th Framework Programme
  Diagnostic Molecular Imaging
  Contract LSHB-CT-2005-512146 (DiMI)
• EU Fifth Framework Programme
  Neuroreceptor Changes in Mild Cognitive Impairment
  Contract QLK6-CT-2000-00502 (NCI-MCI)
• M.L. Jørgensens og Gunnar Hansens Fond
  J. nr. 2956
• Savværksejer Jeppe Juhl og hustru Ovita Juhls Mindelegat

Also, parts of the toolbox were developed at Tufts University, Massachussets, USA. This trip was made possible with funding from:

• Otto Mønsteds Fond
  J. nr. 03-71-898

Bugs

A critical bug was fixed which made BBTools err when estimating the norm of a Matlab-matrix under some circumstances where some columns was zero. This, in turn, caused BBMATRIX to fail for the same class of matrices.

All users are encouraged to upgrade to at least version 0.2.4c, released 09-Nov-2005.

An issue has been found with the installer running under the Ubuntu variant of Linux. While BBTools will still work, the documentation is not properly integrated into the Matlab environment. As a temporary workaround, while this issue is being investigated, is to use the command BBDOC to read the online documentation.

Files

The following files are available for download below: