👁 Computer vision

Unit 2 · How AI works · 9 min

To a computer, an image is a grid of numbers: pixels. Each pixel has red, green and blue values (0–255). Vision models learn edges, then shapes, then objects such as number plates or diseased leaves.

Words in this lesson

• 像素 (xiàng sù) — pixel
• 识别 (shí bié) — recognition

Project: Zoom into a photo until you see pixels; screenshot it and note the colours of three pixels.