OpenSeqSLAM2.0 is a MATLAB toolbox that allows users to thoroughly explored the SeqSLAM method for addressing the visual place recognition problem. The visual place recognition problem is centred around recognising a previously traversed route, regardless of whether it is seen during the day or night, in clear or inclement conditions, or in summer or winter. Recognising previously traversed routes is a crucial capability of navigating robots.

The toolbox provides a number of easy-to-use graphical interfaces that allow users to interactively learn about the SeqSLAM algorithm by exploring and playing with its underlying behaviour. Through visual GUIs users are able to:

• explore a number of previously published variations to the SeqSLAM method (including search and match selection methods);
• visually track progress;
• interactively tune parameters;
• dynamically reconfigure matching parameters while viewing results;
• explore precision-recall statistics;
• visualise difference matrices, match sequence images, and image pre-processing steps;
• view and export matching videos;
• automatically optimise selection thresholds against a ground truth;
• sweep any numeric parameter value through a batch operation mode; and
• operate in headless mode with parallelisation available.

The toolbox is open-source and available on GitHub. See the links below for further details.