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Copyright © John Lindsay, 2015

GEOG*2420

The Earth From Space


Colour Theory and Digital Imagery



John Lindsay
Fall 2015

Readings

JR Jensen Chapter 4, pp. 104-106

The additive colour model (RGB)

Additive colour
(source: unknown)

RGB colour and digital images

  • The additive colour model is commonly used to display digital imagery.

RGB colour and digital images

Digital image data
(source: Jensen, 2007)

RGB colour and digital images

How binary data work
(source: Lindsay, 2013)

RGB colour and digital images

Dynamic range (source: unknown)

RGB colour and digital images

Dynamic range and image bit depth
(source: Lindsay, 2013)

Additive colour model (RGB)

24-bit colour (source: unknown)

Additive colour model (RGB)

24-bit colour
(source: Lindsay, 2013)

Digital Colour-composite images

Colour composite image
(source: Lindsay, 2013)

Multispectral satellite data bands

Landsat 8 band designations
(source: USGS, 2015)

Multispectral satellite data bands

Common Landsat 8 band combinations Landsat 8 band combinations
(source: Butler, 2013)

Multispectral satellite data bands

Landsat 8 bands on the spectrum
(source: USGS, 2015)

Natural colour (Landsat-8 RGB-432)

Colour composite image
(source: Lindsay, 2013)

False-colour Infrared (Landsat-8 RGB-543)

Colour composite image
(source: Lindsay, 2013)

False-colour (Landsat-8 RGB-753)

Colour composite image
(source: Lindsay, 2013)

Subtractive colour model (CMYK)

CMYK colour model CMYK print example

Subtractive colour model (CMYK)

CMYK Colour model
(source: Jensen, 2007)

Subtractive colour model (CMYK)

Photgraphic filters
(source: http://www.aoe.com.au/filters.html)

Subtractive colour model (CMYK)

CMYK colors
(source: Lindsay, 2013)