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Outcome School · Retrieval and RAG15 min read

by Amit Shekhar · 26 June 2026

How do Image Embeddings work?

How image embeddings work. We will also see why we need image embeddings, how a computer turns a picture into numbers, how we measure the similarity between two of them, and where they are used in the real world.

2,961 words#ai#system-design4 recall cards

How do Image Embeddings work?
Read on Outcome School ↗then come back to lock it in
Before you read, guess

Why do raw pixel values fail to represent semantic content?

Ten seconds, a guess, then read — a wrong guess still makes the answer stick.

What this article covers

  1. What is an embedding?
  2. What is an image embedding?
  3. Why do we need image embeddings?
  4. How does a computer see an image?
  5. How are image embeddings created?
  6. A simple numeric walkthrough
  7. How do we measure similarity between two embeddings?
  8. A code example
  9. Where are image embeddings used?
  10. Summary

The article lives on outcomeschool.com. Read it there, then come back: the tutor in the margin has read it and will answer questions, and the questions below check what stayed.

Before you go

In one sentence, what was this chapter about?

From memory, without scrolling up. Writing it is what makes it yours; the grade is only to show you what you had.

How sure?