3D Models from 2D Images A Lecture in the Freshman Seminar

3D Models from 2D Images A Lecture in the Freshman Seminar Series: Puzzling Problems in Science and Technology Oct. 2018 3D Models from 2D Images Slide 1

About This Presentation This presentation belongs to the lecture series entitled “Puzzling Problems in Science and Technology,” devised for a ten-week, one-unit, freshman seminar course by Behrooz Parhami, Professor of Computer Engineering at University of California, Santa Barbara. The material can be used freely in teaching and other educational settings. Unauthorized uses, including any use for financial gain, are prohibited. Behrooz Parhami Edition Released Revised First Oct. 2016 Oct. 2018 Oct. 2018 Revised 3D Models from 2D Images Revised Revised Slide 2

A 3D Object’s Six 2D Projections If we were to manufacture this object, we also need to know about its insides (e.g., is it hollow or solid?) Oct. 2018 3D Models from 2D Images Slide 3

3D Structures Built of Cubic Blocks A 3D assembly of blocks can be specified by three views: Top (Base) Top view (aka base view) Front view Right view (aka side view) Front Oct. 2018 3D Models from 2D Images Right (Side) Slide 4

3D Structures Built of Cubic Blocks Draw the top, front, and right projections in two cases 1. Shapes formed from blocks; 2. Shapes carved out in one piece How many blocks? Top Front Right Oct. 2018 3D Models from 2D Images Slide 5

3D Reconstruction from 2D Projections 5-minute video: https://www.youtube.com/watch?v PXp3D-R7--E Top Top Front Front Right Top Front Oct. 2018 Right Top Right Front 3D Models from 2D Images Right Slide 6

Challenge Puzzle 1: Draw the Three Views Draw once without and once with the removed piece Top Front Right Oct. 2018 3D Models from 2D Images Slide 7

Challenge Puzzle 2: Draw the Three Views Draw once without and once with the two removed pieces Top Front Right Oct. 2018 3D Models from 2D Images Slide 8

Comparing 3D Objects with 2D Projections Are these two objects the same? If not, list the differences. Change the projections so that they correspond to the 3D object Oct. 2018 3D Models from 2D Images Slide 9

Engineering Drawings of A 3D Object Draw the 3D object here Dashed lines represent elements that are invisible in that view (i.e., they are on the back side or inside the object) Front View Oct. 2018 Right View 3D Models from 2D Images Slide 10

Engineering Drawings of A 3D Object Front View Oct. 2018 Right View 3D Models from 2D Images Slide 11

3D Modeling in Practice 3D models are needed everywhere: Computer games Architecture Medical diagnostics Industrial manufacturing (mechanical parts, cars, planes, ) Oct. 2018 3D Models from 2D Images Slide 12

3D Optical Illusions: Sidewalk Art Oct. 2018 3D Models from 2D Images Slide 13

3D Optical Illusions How to create a 3D illusion: Hole on palm of hand 2-minute video: http://www.youtube.com/watch?v s2LrmAThAhk Oct. 2018 3D Models from 2D Images Slide 14

Computer Game Character Animation Similar to animation for film, but here speed is more important 1-minute video: http://www.youtube.com/watch?v yQuStfDbd9s Oct. 2018 3D Models from 2D Images Slide 15

UCSB’s Long-Term Development Plan Oct. 2018 3D Models from 2D Images Slide 16

Virtual Architectural Preview Residential complex viewed from different angles before it is built: 3-minute video: http://www.youtube.com/watch?v zeEiQfgicY Oct. 2018 3D Models from 2D Images Slide 17

Virtual Reconstruction of the Temple Mount UCLA’s Urban Simulation Team built a 3D computer model: 8-minute video: http://www.youtube.com/watch?v HHLD6RXVLaM Oct. 2018 3D Models from 2D Images Slide 18

3D Medical Imaging Multiple 2D images (views or slices) turned into a 3D model. 1-minute video: http://www.youtube.com/watch?v QeqzJbRgQx0 Oct. 2018 3D Models from 2D Images Slide 19

3D Modeling of a Car Turning 2D views into a 3D model 2-minute video: http://www.youtube.com/watch?v uwvthq5ZD0o Oct. 2018 3D Models from 2D Images Slide 20

3D Model Built from Slices: Terrains, etc. Oct. 2018 3D Models from 2D Images Slide 21

3D Model Built from Slices: Human Body Darth Vader’s head assembled from slices 2-minute video: http://www.youtube.com/watch?v S2G2ySEaJso Oct. 2018 3D Models from 2D Images Slide 22

3D Printing: Important Emerging Technology Printing an actual usable wrench with moving parts 4-minute video: http://www.youtube.com/watch?v qx5fDHqHVOE Oct. 2018 3D Models from 2D Images Slide 23

Example 3D Printing Application Airbus’s Thor concept aircraft: Built from sixty 3D-printed structural segments Nov. 2016 3D Models from 2D Images Slide 24

3D Pen: For Playful Experimentation Pen with rapidly cooling molten plastic “ink” for creating wireframes 2-minute video: http://www.youtube.com/watch?v 6r5q9T 7u8A Oct. 2018 3D Models from 2D Images Slide 25