Answer
See the explanation
Work Step by Step
To obtain polygonal meshes for the following cases:
a. A mob at a rock concert: Photogrammetry techniques can be employed to capture multiple images of the mob from various angles, which can then be processed to create a 3D polygonal mesh.
b. A building: Laser scanning or LiDAR technology can be used to scan the building's exterior and interior, generating point clouds that can be converted into polygonal meshes.
c. A sphere: As a basic geometric shape, a sphere can be easily modeled using 3D modeling software, such as Blender or Maya, where a simple mesh can be created directly.
d. A painted canvas: Photogrammetry can also be used here, where multiple images of the painted canvas are taken from different angles to reconstruct the surface and generate a polygonal mesh.
Explanation for correct answer:
The correct option for obtaining polygonal meshes for a painted canvas is option **d**. Photogrammetry techniques can be applied to capture multiple images of the canvas from various angles, which can then be processed to create a 3D polygonal mesh, capturing the texture and shape of the painted surface.
