Lab: RGB colors

Assigned

Monday, 11 September 2023

Summary

We explore techniques for building and transforming RGB colors.

Procedures to remember

Basic color procedures

• (rgb r g b) - create a new RGB color.
• (color-red c) - extract the red component of a color.
• (color-green c) - extract the green component of a color.
• (color-blue c) - extract the blue component of a color.

Working with color names

• (color-name->rgb name) - convert a color name to an RGB color.
• (colors-find name) - find all the colors that include name

Working with images

• (load-image name) - load an image
• (image-map color-transformation image)

The lab

• Use the file rgb-colors.rkt
• You should also download a copy of the kitten image to your desktop.

Acknowledgements

The kitten image was downloaded from http://public-photo.net/displayimage-2485.html. Unfortunately, the site behind that URL has disappeared. Nonetheless, the kitten image lives on.