Photogrammetry
with
Phones
Meetup 3
Lets look at some Models
(Scaniverse/Reality Capture)
Week 3
Polycam (iOS & Android)
Common Problems
Holes,
Geometry
Focus
Tool Tips
Lidar
Cropping
Next Assignment: Larger Objects/Scenes
with Polycam
MJ: Market Leader
iOS & Android
Free - but limitations (100 photos, 5 captures)
7-day free trial for PRO, but
keen to trap you into subscription
Web site storage
Video: Polycam Lidar vs Photo Modes
iOS Android
Video: Polycam: How to Capture: LIDAR
Video: Polycam: How to Capture Photo Mode
iOS only
Upload/Share
Obscure 'other apps'
Advice
Common Issues
Avoid shiny, reflective,
transparent
Light evenly
Take lots of photos
Don't move object
Why?
Camera Calculations
Shadows
baked in
Redundancy
Better texture?
Whole scene capture
Holes
Fixes?
Manual fix in Blender
Auto-fix (some choice)
in another tool
(e.g. Meshmixer)
Use Polycam +Add More/'Extend' tool
and take more Photos
Tricky Geometry/
Poor Angles
See model
Fixes?
Plan your shoot
Selfie-Sticks
Use Polycam 'Extend' tool
and take more Photos
Focus
Fixes?
Initial focus &
tap on screen to re-focus
during shoot
Review photos taken and
drop any bad ones
Lighting
Fixes?
Diffuse.
Multiple LEDS
Gauze
Under-lighting
Fill the Screen
Fixes?
Move closer
Fill the Screen
Fixes?
Move closer
Phone macro lens
(but apps might not use)
Physical Macro lens attached
Q&A
Questions so far?
Tool Tips
Light-weight Tripod
acting as selfie stick
Monopod
See model
S
Lidar Theory
Video: What is Lidar? Note: Resolution
Q&A
Questions so far?
Lidar?
Cropping
Video:
PolyCam Cropping
/ Mark Cropping
Assignment
Make at least one larger model using:
Polycam
Upload to Sketchfab
Turn-in link via Discord
Next meeting is 'small object capture' & Kiri Engine
DO
Pick a large object
(car-sized or above)
Plan your circling & heights
Maybe, use selfie-stick for reach
Use Lidar, if available
DON'Ts
Get too close to your object
be surprised if people ask "WHAT are you doing?"
See Model: Folly
PWP week3
By Mark Jeffcock
