THREE-DIMENSIONAL MODEL RECONSTRUCTION FROM IMAGES USING POSITION TRACKING AND STRUCTURE FROM MOTION
Open Access
- Author:
- Sattler, Benjamin Jacques
- Area of Honors:
- Industrial Engineering
- Degree:
- Bachelor of Science
- Document Type:
- Thesis
- Thesis Supervisors:
- Saurabh Basu, Thesis Supervisor
Catherine Mary Harmonosky, Thesis Honors Advisor - Keywords:
- photogrammetry
image processing
computer vision
image reconstruction
Structure from Motion - Abstract:
- Currently, reverse engineering techniques require a combination of laser scanners, coordinate measuring systems, and human interaction to generate usable files. All of these methods are both cost prohibitive and require many hours to complete. The end result is a three-dimensional model with varying degrees of accuracy. Recreating three-dimensional models is extremely beneficial in cases where the original manufacturer is no longer in business or if the part was manufactured prior to modern three-dimensional modeling techniques. This thesis investigates the accuracy of model generation using photogrammetry algorithms. A digital single-lens (DSLR) camera or a camera found on a modern cell phone are used to keep the cost and barrier to entry low. Initial work completed compared the accuracy of off-the-shelf software before moving on to customized algorithms. New methods combine position tracking from an inertial measurement system (IMU) alongside Structure from Motion (SfM) techniques to create accurate three-dimensional models. The two software packages evaluated are PhotoModeler made by EoS Systems Inc. and Remake made by AutoDesk. Three objects, each presenting different challenges to the photogrammetric method, are used to conclude which software package is more accurate. On all three tests, Remake was the most accurate, at best achieving tolerances of ±■(0.6833@1.2598) mm and at worst ±■(1.6688@1.0084) mm. After conducting tests on a newly created SfM algorithm written in MathWorks Inc’s. MATLAB, the length of a 76.2 mm cube was calculated to be 76.3 mm.