Photogrammetry : ok for organics, bad for mechanics

phunguss

Active Tinkerer
Dec 24, 2023
424
369
63
Stillwater, MN
I have a little turntable that I can program the speed on to take photos for photogrammetry. Programmed with an arduino to run a stepper motor, I originally built it for use with my Creality Scan Ferret 3D scanner.
01_turntable.jpg

The software for the scanner works best on windows, and I rearranged my office and don't have everything setup yet. This is a scan done with the Creality software in the past.
03_astronaut.jpg

I tried photgrammetry instead of the 3D scanner. Meh results. I have a multi-card reader and I want a white faceplace instead of black. Painting would have been easier.
02_part.jpg

Round and round, took 52 photos.... let AliceVision Meshroom run for about 8 hours to plot this mess:
Photogrammetry-test1.jpg

Then I spent about 4 hours just measuring and manually creating it in 3D instead.
Photogrammetry-test3.jpg

Better result by doing it manually.
05_3face.jpg

My faceplate results
06_done.jpg


But why do I want it in white? For a Mini eMac I am 3D printing. Notches in the bottom of the faceplate are for the spring loaded door.
IMG_633702-480p15mb.gif

I got the idea from a light switch.
Spring-maxresdefault.jpg
 
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mmu_man

Tinkerer
Jan 30, 2022
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Sadly yeah you still need to model mechanical things for accurate reproduction… Nice result!
 
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Towmater

New Tinkerer
Nov 22, 2021
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Spray it with foot powder talc, then “flick” cinnamon onto it to create the stochastic noise texture that photogrammetry requires. Tough scanning calls for tough actin’... Tinactin.
 

phunguss

Active Tinkerer
Dec 24, 2023
424
369
63
Stillwater, MN
Spray it with foot powder talc, then “flick” cinnamon onto it to create the stochastic noise texture that photogrammetry requires. Tough scanning calls for tough actin’... Tinactin.
I tried the foot powder with a puck mouse disassembled and it still came out horrible (all parts attached to a tube to get the best angles).
PM-powdered.jpg

But it was a good base I could take into 3D modeller and use it as a background to rebuild it with modelling tools.
PM-meshing.jpg

Next time, I will try the cinnamon specs! After the manual rebuild, I could convert my Bondi puck to Strawberry and build a miniature.
PM-mini.jpg