Atmos Wiki

This page is read only. You can view the source, but not change it. Ask your administrator if you think this is wrong.
====== LiDAR/3D Scanner ======
A LiDAR or 3D scanner is employed to generate a three-dimensional model of instruments, structures, or the body within specialized software. This model is utilized to conduct simulations, among other applications.
===== Pre-scanning checklist =====
  - __**System requirements:**__   
    * **Know the system requirements.** Before setting up the LiDAR scanner, make sure your computer meets the minimum processor and graphics card requirements needed to run the scanner software.
  -  Connection with device : 
    * **Connecting with laptop** __**(RECOMMENDED)**__: To connect to a laptop, use the cables provided with the scanners.
    * Connecting with phone : (1) The scanner and phone should be connected to the same WiFi. (2) Visit the scanner's application to verify the connection with the device.

==== Before scanning ====
  - Choose a New Project
  - Check Camera setting/exposure : 
    * Open live camera view before scanning
    * Exposure indicator : 
      * **Green** = Proper exposure.
      * **Red** = Lost track of exposure (Proceed to the location where the scanning process was halted.).
      * Adjust lighting if needed for the settings.
  - **Tracking Method** : 
     * Geometry Mode : 
      - Uses the object's shape for tracking.
      - Recommended for objects with little surface texture.
     * Texture Mode: 
      - Relies on visible surface patterns.
      - Better for highly textured objects.    

===== Scanning Technique =====
  - Maintain approx. 60 cm of distance between the scanner and the object.
  - Avoid moving too close because it reduces tracking quality. 
  - Moving too far away leads to higher chances of losing tracking performance. 
  - The recommended scanning technique is to scan the object from multiple angles.
  - Avoid quick or jerky motions, as it will lead to losing track of the motion.
  - Continuously move around the object instead of making sudden direction changes.
  - The scanner builds a 3D map while moving, so smooth motion helps maintain tracking.

===== Anchoring Points =====
Begin scanning from a distinctive point. For example, for scanning the 2D-S instrument, scan from the top-semispherical part. 

Good anchor points : 
  * A unique end or  feature
  * Returning to an anchor point can help the scanner recover if tracking is lost.

===== If Tracking Lost(SLIP) =====
To Recover: 
  - Return to previously scanned area
  - Move slowly until tracking resumes
  - Continue scanning from that location.

===== IR Reflective Markers=====
If tracking repeatedly fails:
  - Apply IR reflective marker stickers around the object.
  - Switch the tracking mode from Point Cloud to Global Marker.
  - Markers provide additional reference points for the scanner.

===== Saving the scan =====
  - If the scan contains major slipping or distortion, discard it and rescan.
  - Save scans only when the object has been reconstructed correctly.