Module Topic:
Photogrammetry
The science and technology of obtaining reliable information about physical objects and the environment through the process of recording, measuring and interpreting photographic images and patterns of electromagnetic radiant imagery and other phenomena.
The term photogrammetry was coined by the Prussian architect Albrecht Meydenbauer, which Photogrammetric data can be complemented with range data from other techniques. Photogrammetry is more accurate in the x and y direction while range data are generally more
accurate in the z direction. This range data can be supplied by techniques like photogrammetry, LiDAR, laser scanners (using time of flight, triangulation or interferometry), white-light digitizers and any other technique that scans an area and returns x, y, z coordinates for multiple discrete points (commonly called "point clouds"). Photos can clearly define the edges of buildings when the point cloud footprint cannot. It is beneficial to incorporate the advantages of both systems and integrate them to create a better product.
A 3D visualization can be created by georeferencing the aerial photos and LiDAR data in the same reference frame, orthorectifying the aerial photos, and then draping the orthorectified images on top of the LiDAR grid. It is also possible to create digital terrain models and thus 3D visualizations using pairs (or multiples) of aerial photographs or satellite (e.g. SPOT satellite imagery). Techniques such as adaptive least squares stereo matching are then used to produce a dense array of correspondences which are transformed through a camera model to produce a dense array of x, y, z data which can be used to produce digital terrain model and orthoimage products. Systems which use these techniques, e.g. the ITG system, were developed in the 1980s and 1990s but have since been supplanted by LiDAR and radar-based approaches, although these techniques may still be useful in deriving elevation models from old aerial photographs or satellite images.
Software to be covered:
Autodesk Recap Autodesk Recap Photo Matterport Portable
Free Educational version
Free Educational version
Mobile version is a free download.
Interconnectivity Software – Revit, sketch up and beyond
Hardware needs:
Laptop with external Graphics Card Cell Phone
Digital Camera
Hardware that will be covered:
Droning Technology Lidar Scanners Matter Port Scanners
Problem Narrative:
Photogrammetry – Application, Process, & Beyond. Practical Applications with current technologies. How to apply this technology for design.
The future of the industry.
Creating objects from polygonal space. Final – 3D Printed model of extracted data.
Sessions Outline:
Session 1 - 2/9
Introduction – Presentation to the process of Photogrammetry – live examples of current work. – Introduction to the software Cloud Solutions
Session 2 - 2/16
First pass and presentation of Process – find an object and convert it to a digital model – converting Photogrammetry into a 3D software platform. – editing basics, both in photogrammetry software.
Session 3 - 2/23
Final 3D presentation – Physical Model and presentation of the documented process.
Resources or Readings: Web resources:
Basics of Autodesk Recap
https://knowledge.autodesk.com/support/recap/learn
Basics of Autodesk Recap Photo
https://learn.microsoft.com/en-us/dynamics365/mixed-reality/guides/3d-content- guidelines/autodesk-recap-photo