238,854 Miles

Earth

Moon

225,000,000 Miles

Earth

Moon Mars

Computer Vision

Using Stereoscopic Imaging Techniques to Produce a Three-Dimensional Scene

Kevin SchaeferSenior Honors PresentationMcKendree University4/24/2014

The goal:

3D

What’s in an image?

3 components:1. Red 1212. Green 1103. Blue 90

Stereo vision

Left viewpoint Right viewpoint

The Correlation Problem

Correlation algorithms

• Sum of Absolute Differences• One of the simplest methods of block searching in

images

• Assuming normalized images:

Disparity

Left viewpoint Right viewpoint

Roof

Tree branch

Calculating Distance to Objects• Distance to an object is inversely proportional to

the disparity of that object

Left viewpoint Right viewpoint

Roof (farther away)

Tree branch (closer)

ApplicationsMars Curiosity RoverSpirit & Opportunity