8.13. Structure from Motion (SfM) in Photogrammetry

Try these first

1. 1.

   What is Structure from Motion (SfM)?

   Hint

   Think about how pictures can show depth.

2. 2.

   What do we mean by image acquisition in SfM?

   Hint

   Consider what type of devices are used to take these images.

3. 3.

   What is Structure from Motion (SfM)?

   • A 2D modeling technique
   • A method to create 3D models from 2D images
   • A type of camera used in photography

   Hint

   Consider the relationship between the dimensions in this technique.

4. 4.

   True or False: SfM requires a calibrated camera to function effectively.

   • True
   • False

   Hint

   Think about what makes this method user-friendly.

5. 5.

   You are given a dataset of images from a disaster site captured by a drone. Describe the steps you would take using SfM to create a 3D model of the area and explain how you would ensure accuracy in your model.

   Hint

   Think about which step impacts accuracy the most.

6. 6.

   Consider a scenario where SfM yields a poor 3D reconstruction due to low-quality images. Propose a solution to improve the outcomes and explain why your approach would be effective.

   Hint

   What factors affect image quality, and how can they be improved?