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Lesson 2. How multispectral imagery is drawn on computers - Additive Color Models

Leah Wasser

Learning Objectives

  • Describe the difference between additive and subtractive light models.
  • Explain how RGB images are rendered in a computer monitor.

The ~1 minute video below inspired the demonstration that you saw in class.

The 2:30 minute video below shows the difference between additive and subtractive light models and demonstrates subtractive models with paints.

The ~3 minute video below has no sound, but look closely as they zoom in on the pixels of an old school computer monitor. You will notice that each pixel is composed of three types of light red, green and blue.

Intro to Multispectral Data

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