The VLFeat reference documentation has three parts:
| MATLAB functionsThe reference documentation of VLFeat MATLAB commands (this is an on-line version of the documentation built in the command themsevles). | C API referenceThis documentation includes descriptions of all the algorithms and hence it is useful even if you do not plan to use the C library directly. | Man pagesThe documentation of the command line
        utilities bundled with VLFeat (this is an on-line version
        of the Unix man found in the  | 
In addition to the documentation, there are also tutorials which introduce many of the algorithms contained in the library.