RTAB vs OSS Document 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.

OSS Document Scanner is a free and Open Source app to transform your mobile device into a powerful document scanner. SCAN * Scan your documents or receipts with a fast camera scan. * Enjoy the automatic edge detection feature allowing you to quickly scan many documents * Bulk scan documents or book pages * Import documents from images or even existing PDF * You can scan to PDF any kind of document: Receipts, IDs, notes, recipes, photos, business cards, whiteboards, books. You can then use and work with the generated PDFs on all your devices, phones, computers, tablets... ENHANCE * Improve PDFs quality by applying enhancing filters for color or black & white documents. * Edit crop * Reorder pages, merge documents * Rotate pages * Change brightness and contrast to create beautiful documents ORGANIZE * Create folders with colors for easy access * Sort documents * Name documents EXPORT * create PDF directly from your mobile device by converting photos, images, other documents, into beautiful and configurable PDFs. * export and share your documents to PDF or JPEG or PNG with your friends, family, colleagues SEARCH * OCR your documents using offline (to be downloaded first) and open source models in many languages. * Generate searchable PDFs by converting images to text using the powerful OCR models from the Tesseract project. SECURITY * Improve the security of your generated PDF by adding a password. SYNC * Synchronize your documents, PDFs, Images with your computers, other devices or local folder sync. * Sync to WebDAV, Google Drive or OneDrive PRIVACY * Use a free and Open Source document scanner to protect your privacy COMMUNITY * Provide feedback or even help translate the app. You are part of this project and you make help it grow so that everyone can enjoy the best free and open source document scanner