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Workshop Report WHI 18-11-2022 On site

Report File
  • Location type:
    on site
  • Location:
    BRUSSELS (Exhibition Hall)
  • Date / Time:
    2022-11-18 / 9h to 13h (4h)
  • Crew:
    Robby HOUBEN (WHI), SolèneLELIEVRE (Objet Témoin), Julien VANDANJON-RANCOULE (Objet Témoin)
  • Item(s) Shooted (Reference Code(s)):
    Mark IV LODESTAR III (Vehicule#1110216)
  • Section (if relevant):
    Vehicule, WW1 section

Shooting Summary


Preproduction actions performed (1h) : Making OFF Pictures link here - Early tests Uploads link here

  • Setup Unplugging of internal exhibition lighting, removal of sponsons plexiglass, installation of color accurate lighting device through the roof hatch
  • Pollution and Safety measures : Crew protective equipment shoes, gloves, suit
  • Public line delimitation around the asset and temporary security signaling studs, research crew signalisation for regular visitors
  • Side Object visual pollution : masking with Black Matte Clothing

Tested 3rd Party softwares

Production

  • Shooting of Exterior Front Pilot and Officer openings in photogrammetry via KIRI Engine App Cloud Service - SUCCESSFUL
  • Shooting of Exterior Shell (COMPLETE) in photogrammetry via Drone Dji Mavic Mini 2 for post-treatment via KIRI Engine Online Web Service (Beta) - SUCCESSFUL
  • Shooting of Exterior Shell (COMPLETE) in photogrammetry via Android Smartphone for post-treatment via Scann3D Service (Beta) - FAILED
  • Shooting of Exterior Shell (COMPLETE) in Lidar with Apple iPad Pro via Scaniverse Application - BAD QUALITY
  • Shooting of Exterior Shell Focus on Left Sponson with Apple iPad Pro via Scaniverse Application - SUCCESSFUL
  • Shooting of Exterior Shell Rear Fuel Tank Shielding with Apple iPad Pro via Scaniverse Application - SUCCESSFUL
  • Shooting of Exterior Shell Roof Trench Beam and pending Chains with Apple iPad Pro via Scaniverse Application - SUCCESSFUL
  • Shooting of Interior Shell Left Sponson Graffiti Wall with Apple iPad Pro via Scaniverse Application - SUCCESSFUL
  • Shooting of Interior Shell Interior of Right Sponson Gunner Position with Apple iPad Pro via Scaniverse Application - BAD QUALITY
  • Shooting of Interior DAIMLER Engine with Apple iPad Pro via Scaniverse Application - SUCCESSFUL
  • Shooting of Interior Driver and Officer Seats with Apple iPad Pro via Scaniverse Application - SUCCESSFUL
  • Shooting of Interior 360° 6 crew positions POV with XPhase Pro S camera and combined lighting (exhibition + extra sources) - IMPROVABLE

Total raw pics produced: 496

Successful Panoramic Views Rebuilt: 0

360° Equirectangular shots/rebuilds: 6

Total pics delivered: Work in Progress

Nb of Cameras: 4

Camera Types: Smartphone(x), iPad Pro M1, Canon 5Ds, xPhase Pro S

Issues

Internal spaces Lighting power to improve, Needs more and smaller sources instead of Chinese Lantern which is too visually polluting the scene, softer lighting and homogeneous repartition via face windows, pistol hatches and other hidden holes in vehicule shelf.

Fast Conclusions Debrief

The Lidar and photogrammetry shooting is globaly a success, proving simple and affordable tools such as Android and Apple smartphones are able to produce quick usable 3D models for basic measurements and museography drafting. Some limitations appeared though, wich need to be listed and used in project planning and scheduling :

  1. No native Apps are provided by hardware manufacturers, 3rd party apps are required, but the offer is plethorus and accurate choice can be a jungle
  2. Apple LiDar offers the most quick and easy worksflow with intuitive user interface including live vision of surfaces mapped vs surfaces yet unknown to the device. Production cycle
  3. Even with matte surface and homogeneous lighting, some object features are tricky for system reconstruction, like perfectly cylindrical barrels (such as canons)  and aerial bars and wires (such as angle iron) only attached to the main body of the object via extremity contact points. Post processed Photogrammetry does better job on this than Apple LiDar.
  4. With the same Devices : Different apps produce different results, one single app may not cover all cases alone, algorithms are the key here, but invisible to the digitization operator before final compilation result. Therefore the choice of an app for a regular production cycle may consider quality of rendering algorithms depending on two main factors :
    1. Duration of the capture (auto-pointcloud decimation may be an issue on some devices)
    2. Size of the Objet scanned (large objects take more time, then are more subject to decimation quality downgrade risk)
  5. Obvious but still worth mentionning : Local Rendering shows quicker limits than cloud post-processing. Said differently : results obtained directly on Phone ou Tablet in 10 minutes are usually far less accurate than results obtained after letting the device upload all data to a High performance Cloud Computing Service wich usually delivers better quality results in 30minutes to 3 hours. Therefore being able to select the option "keep the raw data" while capturing is a must-have. Some apps simply doesn't allow local post-processing (such as KIRI Engine) and some apps doesn't allow external reprocessing (such as Scanniverse). 
  6. Even with practical and immediate applications, Captured 3D models from reality in complex environments such as Museum Showroom must not be considered scientifically accurate beyond a certain point (non-homogeneous lighting, color deviation, reflections, lack of space for distance capture consistency, algoritmic interpretation distorsion...) and thus may at least be CLEANED in a desktop 3D editing software as part of the regular workflow. Timings for this to follow.

Workshop production samples

Here are some samples of the actual raw productions of the Workshop :

Objet Témoin ASBL website is proudly curated by J. Vandanjon Consulting - Our work is documented under creative commons license, but some items mentioned and illustrated may be regulated by specific conditions of private collectors, NGOs, foundations and public museums. Please advise. thx.