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A5 - Colours and Filters

We'll start by taking a quick look at colour theory.

Hue, Saturation, Value

Full article here.

Summary:

  • Hue is the location on the colour wheel or where in the rainbow where the colour lives.

  • Saturation is the vividness of the colour. As saturation approaches zero, the images approaches black and white. Another term, Chroma is (almost, but not quite) a synonym for saturation. For our purposes, we can consider these two terms to mean the same thing.

  • Value is the lightness of the colour. A lot of software, including Gimp, use the term Lightness in place of value.

Part 1 - Experiment

Open an image. Make sure the full layer is selected, then take some time to play around with some of the features under the menus Color and Filters.

You do not need to submit or show me anything for this part, but take time to really get a feel for what Gimp (or the alternate software you choose) has to offer.

Part 2 - Become an Expert on a Colour Tool or Filter

Either on your own or with a partner, you will learn about one colour tool or filter in as much detail as possible. Use articles and/or videos online to help you gain as much insight as possible.

Later, you will give a short presentation to the class about what you learned (if you really don't like the idea of presenting in front of the class, an alternate option is possible).

Before You Start Part 2

I would like to try to get as much variation as possible in these presentations. Therefore, please give me your top three choices of features you would like to do for this, and then I'll assign features the best I can based on everyone's preferences.

Part 3 - Four Quadrant Assignment

You will create two images similar to this:

For each of them, you should open an image, then duplicate the image layer three times so you have four layers in total. Adjusting your canvas size as needed, move each image within the layer so that you end up with one copy of the image in each of the four quadrants, as shown in the example above.

For Your First Image

  • Leave the top-left quadrant untouched
  • In each of the other quadrants, apply a different colour effect

For Your Second Image

  • Leave the top-left quadrant untouched
  • In each of the other quadrants, apply a different filter