What Exactly mean STL and LTM

[thanhnguyen]

Hi Mathieu,

I want to ask what does it mean when you say short term memory and long term memories. Are they on STM is Heap and LTM you save on Hard disk?

[kemfic1]

Some data is stored in RAM/Swap (STM)  for performance, and some is stored in your disk (LTM).

[matlabbe]

Conceptually, there are three kind of memories: Short-Term Memory (STM), Working Memory (WM) and Long-Term Memory (LTM). Basically, WM includes STM and it is in RAM. LTM is the database and it is stored on disk.

With parameter DbSqlite3/InMemory set to true, everything is stored in RAM. Beware what when set to true, the database is written on disk only on exit, so if the robot/computer crashes, we cannot recover the map created so far.

For more details about STM, WM and LTM, see the paper: Appearance-Based Loop Closure Detection for Online Large-Scale and Long-Term Operation (e.g., beginning of Section III)

cheers,
Mathieu