| prapi::extras::JHDistance | A proximity measure represented in "Jain A and Healey G (1998) A Multiscale Representation Including Opponent Color Features for Texture Recognition |
| prapi::extras::JHExtractor | JHExtarctor |
| prapi::extras::MMDistance | A proximity measure represented in "Manjunath B.S |
| prapi::extras::OutexClassificationEngine< T, I, C > | This class automatically parses and classifies Outex test suites |
| prapi::extras::OutexException | Thrown when something is wrong with a test suite |
| prapi::extras::OutexResult | This class is the container for Outex results |