Help Movies: Before and After

II. Analyzing Images
Title: Before and After Comparison
Type: Spectral analysis

Essential Question: Are there differences between two digital images? How can you use digital image analysi s to analyze the similarities and differences between two digital images? Has anything been moved or change d from one scene when compared to a similar digital image of the same scene?

Description: In this program you learn how to import two digital images of a typical scene, and use color a nalysis to make a comparison image. The comparison image will show whether there are changes or not. You mu st start with two images that are taken from the same place. This is a technique for comparison of plant an d tree growth, sky and cloud changes, and for fun, detective work in your office.