Colour Perception and the Trichromatic Theory
Colour isn't really "in" objects — it's how our eyes and brain respond to light.
What this unit covers
Unit 3: Digital Image Fundamentals and Colour Models
- 1 Definition of a Digital Image: Sampling and QuantizationA selfie holds no faces at all, only a grid of numbers made by sampling the scene and rounding its brightness. · 4 min
- 2 Basic Image Concepts: Pixel, Resolution, Colour Depth and Frame RatePixel, resolution, colour depth and frame rate — four small words that every picture on every screen depends on. · 3 min
- 3 Types of Digital Images: Binary, Grayscale, Colour and IndexedBlack and white, shades of grey, full colour or a clever palette — what a pixel stores decides what kind of image you have. · 3 min
- 4 Colour Perception and the Trichromatic TheoryColour isn't really "in" objects — it's how our eyes and brain respond to light. · 3 min
- 5 Colour Models: RGB, CMY(K) and HSVWhy does your screen mix red, green and blue while the printer reaches for cyan, magenta and yellow? · 7 min
- 6 Image Processing in MATLAB: Basic CommandsAn image is just a matrix, so a few lines of MATLAB can load, show, change and save one. · 3 min