Visual simultaneous localization and mapping (vSLAM or visual SLAM) is an important technique for mobile robot localization in the global navigation satellite system denied (GNSS-denied) environments. However. the positioning accuracy could become unbearable due to the lack of image feature points when the robot navigates in a spacious indoor space. The drifting errors accumulated ove... https://www.diegojavierfares.com/flash-offer-A-D-EJ-123-Newton-Compact-Balance-Scale-120-x-0-001-g-hot-grab/