RTAB vs NightWalk Depth Scanner

RTAB-Map (Real-Time Appearance-Based Mapping) is an Open Source LiDAR / RGB-D / Stereo Graph-Based SLAM (Simultaneous Localization and Mapping) approach based on an online incremental appearance-based loop closure detector. The loop closure detector uses a bag-of-words approach to determinate how likely a new image comes from a previous location or a new location. When a loop closure hypothesis is accepted, a new constraint is added to the map's graph, then a graph optimizer minimizes the errors in the map in real-time. An optional memory management approach can be used to limit the number of locations used for loop closure detection and graph optimization, so that real-time constraints on large-scale environnements are always respected. ARKit's visual inertial odometry (VIO) is used as the SLAM front-end for RTAB-Map (the SLAM back-end). * Note that unlike other scanning apps that optimize the map only after mapping, with RTAB-Map you get loop closure detection and map optimization online so you can have a live feedback to know when you have enough constraints in the map for good global optimization before stopping the scan. *** 3D reconstruction available only with LiDAR sensor. Features: * Online 3D scanning/mapping of the environment. * Online loop closure detection and map correction. * Save in DB format (RTAB-Map desktop and rtabmap_ros format). * Export in PLY, LAS or OBJ. * Multi-session mapping (save and continue later). * Use Apriltags to help finding loop closures in textureless environments. * Mixed AR/VR First-Person in visualization mode. * Raw ARKit data recording (up to 60 Hz!), useful to record long sessions without comprising battery life.

NightWalk transforms your iPhone into a powerful tool for exploring dark environments. Using the LiDAR sensor, the app creates real-time depth-based visuals, helping you understand the space around you—even in total darkness. Take clear photos and record videos of what the LiDAR sees, and save them right to your device. Switch between color palettes, including grayscale and enhanced contrast modes, to match your preferences or lighting conditions. Need to measure distance? Tap the Distance button to activate a center-target reticle that instantly displays how far an object is from you. This is perfect for navigating unfamiliar areas, inspecting spaces, or simply experimenting with LiDAR’s capabilities. Customize the app’s performance in the settings: Choose smoother, faster scanning, or prioritize visual quality for more detailed results. Please note: NightWalk operates within the effective LiDAR range of approximately 10 cm to 5 meters. Objects closer than 10 cm or farther than 5 meters may not be detected accurately. Whether you’re indoors, outdoors, or simply curious, NightWalk gives you a new way to experience the world around you.