What are Computer Graphics? From Pixels to Images

Learning Objectives Define computer graphics and explain its importance in modern technology. Identify a pixel as the fundamental building block of digital images. Explain the concepts of image resolution and aspect ratio. Describe how colors are represented digitally using RGB values. Differentiate between raster and vector graphics. Understand the basic process of how a computer displays an image on a screen. Ever wonder how your favorite video games look so real, or how animated movies bring characters to life? 🎮 It all starts with computer graphics! In this lesson, we'll explore the fascinating world of computer graphics, from the tiny dots that make up every picture to how computers create the stunning visuals we see every day. Understanding this foundation is ke...

TermDefinitionExample PixelThe smallest individual unit of a digital image or display. Each pixel typically represents a single point of color.Imagine a grid on your screen; each square in that grid is a pixel, showing one color. ResolutionThe number of pixels displayed on a screen or in an image, usually expressed as width x height (e.g., 1920x1080). Higher resolution means more detail.A 1920x1080 screen has 1920 pixels horizontally and 1080 pixels vertically, totaling over 2 million pixels. RGB Color ModelA system for representing colors by combining varying intensities of Red, Green, and Blue light. Each color component is typically represented by a number from 0 to 255.Pure Red is (255, 0, 0), Pure Green is (0, 255, 0), Pure Blue is (0, 0, 255). White is (255, 255, 255) and Black is (...

Pixel Grid Principle Digital images are fundamentally constructed from a finite grid of individual colored pixels. This rule explains that every visual element you see on a screen, from text to photos, is broken down into tiny colored squares. Understanding this helps in comprehending resolution and image quality. RGB Color Mixing Any color on a digital screen can be created by combining different intensities of Red, Green, and Blue light, each ranging from 0 (off) to 255 (full intensity). This rule is fundamental to how computers represent and display colors. By adjusting the three values (R, G, B), a vast spectrum of colors can be generated. Resolution vs. Detail Higher resolution (more pixels) allows for greater detail and sharper images, while lower resolution resu...