National Key Laboratory of Cognitive Neuroscience and Learning GNU General Public License (GPL) Yes Beijing Normal University NITRC M3 Yes The M3 (multi-modal imaging and multi-level characteristic with multi-classifier) is a brain imaging classification tool, which can help researchers to discriminate patients from normal controls. The M3 includes three steps: feature selection, maximum uncertainty linear discriminant analysis (MLDA)-based classification and multi-classifier. A leave-one-out cross-validation (LOOCV) is further used to estimate the performance of the M3. Finally, the most discriminative features are identified. 2011-9-26 M3 classification M3 GNU General Public License (GPL), MR, Alzheimer Disease http://www.nitrc.org/projects/pare/, http://www.nitrc.org/projects/pare/