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