What is MidJourney?

MidJourney is an AI-powered system that creates images from user prompts. On their website, they describe themselves as: “An independent research lab. Exploring new mediums of thought. Expanding the imaginative powers of the human species.”

How does it work?

Similar to OpenAI’s DALL-E or Google’s Imagen, it’s a text-to-image generation tool. You just type in a textual description, called a prompt and let the AI do its magic.

How does AI do its magic?

Under the hood, it’s a neural network that uses a diffusion model to generate images.

Diffusion models work by altering the training data with the addition of Gaussian noise, gradually removing the details in the data set till it becomes pure noise, and then training a neural network to reverse this corruption process. Running this reversed corruption process synthesises data from pure noise by slowly reducing noise to produce a clean sample.

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