NoRights Podcast: S2E40 – 3D Scanning

This week Ben & Ian discuss 3D scanning and photogrammetry. Used in a wide variety of fields

Entertainment and Arts Industrial Scientific Forensic Cultural / Historic Heritage Medical General Discussion on Point Clouds

3D Scanner

Point Cloud

Point Cloud Guru

Point Clouds.org

Scanning Methods

Mechanical Contact Probe Scanning

Carriage Scanning Arm Scanning / Pen Scanning Coordinate Measuring Machine

Coordinate Measuring Machine

Digitzers

Pros – Older technology, but highly accurate, has a higher resolution.

Cons – Scanning is very slow and tedious, and could damage the object being scanning, such as older and valuable historical objects.

Useful for smaller objects, such as toys or figurines.

Laser Scanning

NextEngine

Arctec Portable Scanner

David Laserscanner

3D Scan with Virtucube and David Laserscanner David Laser Scanner offers DIY, low-cost 3D recording solution

Pros – Fairly accurate, with high resolution.

Cons – Scanning can be slow, depending on the desired resolution, and requires the subject to not move. Also multiple scans are required to construct and stitch together the whole model. Depending on the laser scanning method used, the shape is reconstructed, but without color information.

Useful for small to medium sized objects, such as toys, figurines, dolls, faces.

Structured Light Scanning

Structured-light 3D Scanner

Portable 3D Scanners: Handyscan 3D

Using Projectors and a Camera

Structured-light 3D Scanning

Real Time 3D Scanning with Structured Light

Real Time 3D Scanning How to Realtime 3D geometry video scanner

Picoscan

New TV Camera turns reality into 3D, The F5 Mantis Vision

Kinect

Kinect

Kinect-Hacks

Kinecthacks.com

KinectFusion Project Page

RecontrsuctMe Kinect for Windows with PCL

KinectFusion HQ

Low-cost 3d Laser Scanner and fast Surface Registration

Tutorial – ReconstructMe Multiscan

Comparison of ReconstructMe, KinectFusion and Skanect

Pros – The advantage of structured-light 3D scanners is speed and precision, and you can often capture the color information along with the model. Can be more precise than laser scanning. Also moving / animating objects can be captured in realtime.

Cons – Multiple scans / viewpoints are needed to reconstruct the whole model, and each scan needs to be stitched together either manually, or automatically depending on the software used in reconstructing the point cloud data. Useful for medium to large sized objects, depending on the method used, such as faces, people, progressive scanners can capture environments.

Photogrammetry Stereo(Multi-Image) Photogrammetry – Stereo Cameras – Multi-Camera Rigs – Image-Based Modeling – Reference Modeling – 3Sweep

3D Reconstruction from Multiple Images

The Importance of Camera Calibration

Introduction to Photogrammetry

Photogrammetry

Photogrammetry.com

[Photogrammetry] Autodesk 123d Catch – pt.1

Sketchup Model Building

How to Model for Google Earth using Google SketchUp

Camera Rig for 123D Catch

Turn Ordinary Photos Into Extraordinary 3D Models

Photoscan

PhotoModeler Scanner

Photosculpt

3-Sweep

3-Sweep: Extracting Editable Objects from a Single Photo, SIGGRAPH ASIA 2013

Pros – Very good accuracy, especially with capturing color detail with the model, no special equipment needed for scanning, easy workflow.

Cons – Process can be slow and require a large amount of images, using up disk space, multiple cameras gets expensive.

Useful for a variety of object sizes.

Photometric Stereo – Multiple Lighting Conditions – Shape From Shading – Form Recognition – Bump Mapping

Photometric Stereo

Photometry (optics)

Making PTMs

Virtual Reality, HDR, Photogrammetry at ICT

Non-Rigid Photometric Stereo with Colored Lights

3D Face Shots Snapped by Single Camera

Crazy Bump

Normal Map Photography

PixPlant

ShaderMap

Pros – High accuracy and detail and speed. Realtime capturing can also be possible from multiple angles.

Cons – Also results in a large amount of images which are captured, Multiple angles need to be captured and stitched together.

Useful for very small to medium sized objects, and also useful for capturing surface detail for bump mapping.

Light Fields (Capturing the angle of light) – Lytro

Light-field Camera

Lytro

Lytro Light Field Camera 8GB

Turn any DSLR into a light field camera, for free

Volumetric 3D and 4D Scanning

CT Scanning MRI Scanning Ultrasound 3D and 4D